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Table of Contents
How much does it cost to repair a lower unit?
A typical set of parts for the gearcase can cost $500-600 and may go higher if the gearcase is severely damaged. If you have your local mechanic repair the lower unit, his labor will run about $300-400 for this type of repair.
What causes lower unit failure?
Just random failures due to normal wear and tear. Wear and tear over time. Fishing line around prop shaft damaging seal and allowing gear lube to leak out or water to get in. Impact when a propeller hits bottom. 17 thg 8, 2019
How much does it cost to rebuild an outboard lower unit?
Rebuilding your engine will cost around $2,500. That difference of $1,000 to $2,000 will buy a lot of gas, so consider carefully. 30 thg 10, 2019
What color should lower unit oil be?
What Color Should Lower Unit Gear Oil Be? Brand new gear oil should be a shade of blue, green, brown, or yellow, depending on the brand. Used gear oil should be a black/dark variation of the brand new color. Knowing what these colors mean and also the other colors you will encounter is important.
Why is my lower unit leaking oil?
The problem will be simple to see once the lower unit is pulled. It also could be that your new gear case has a blown seal , especially if it was overfilled . The seal below the water pump can get sucked in when it cools if there is too much lube in it because of not enough airspace for expansion … 22 thg 11, 2016
Can you fill lower unit oil from top?
This. Adding from the top, with the bottom buttoned up so oil doesn’t drain right back out, creates an air pocket. It is a pain filling from the bottom though… Yep, if there isn’t oil in the LU, then there is air. 6 thg 10, 2012
How do you know your outdrive is bad?
Bad outboard lower units can give the operator shifting issues, and other signs will include water in the gear lube, metallic particles on the drain screw magnet, clunking sounds when shifted, or the loss of the ability to shift into gears.
How do you know if you spun a hub?
To tell if your hub has spun, mark a line on the back of the prop hub with lipstick. You can also score your mark using a file. With the mark in place over the inner and outer hub, it’s a simple matter to pull the prop and see if the mark has broken in two. If it has, you have spun a hub. 10 thg 2, 2020
How often should you change lower unit oil?
every 100 hours Most sterndrive and outboard manufacturers advise you to change the gearcase oil in your lower unit every 100 hours or once a year (whichever comes first). Clean oil is critical for protecting the heavily loaded gears in your lower unit and preventing expensive damage. 24 thg 6, 2019
When should a marine engine be rebuilt?
After 5,000 hours, yacht owners can choose between rebuilding their engine fully or partially. Most marine engines don’t get fully worn out. What’s more common is for one or a few parts to start malfunctioning. 16 thg 1, 2020
How much does it cost to put a new motor on a boat?
So if you are one of these lucky ones, your engine replacement will cost around $5,000 if you either want something smaller or get a good deal. $10,000 is the top of the range estimate you will have to pay in case you are looking for more power, and/or fancy one of the bigger manufacturer brands.
Are rebuilt outboards reliable?
When finished, a rebuilt outboard engine can be reliable. The skill of the rebuilder and the quality of the components used will really determine the outcome. The quality of the original design and manufacturing will also influence the rebuilt engine reliability. 11 thg 7, 2020
What causes water in lower unit of outboard motor?
This is usually caused by a leaky seal due to fishing line or other fine debris that got wrapped around your prop shaft. If you have water in your oil, don’t finish the oil change because water will just seep back in when you get out on the water. 11 thg 6, 2015
What does water in gear oil look like?
It’s unusual for industrial gear oil to have a milky appearance because it has good water separation properties. Free water should be settling down to the bottom of the reservoir tank, which can easily be drained out. However, it is possible for water to contaminate a gear box. 23 thg 2, 2016
Why is lower unit oil black?
If it does stink that’s just an indication of very old worn out oil . Assuming no water or shavings, drain it, flush it , refill it , and enjoy it .. if it had water in it the oil would be milky. black is good just drain it and refill with new oil just make sure you change the little gasket with new one. 27 thg 5, 2017
How do I know if my gearbox needs oil?
Signs That You Need to Change Your Transmission Fluid Puddles under your car. … Roaring sounds when you accelerate or go around corners. … Difficulty shifting. … Engine revving when going around corners. A chattering noise when you start driving. … A slight burning smell. Warning light. 11 thg 12, 2020
Why is my lower unit leaking water?
The reason you are seeing water coming from the seam is that 1- the water pump is not sealed to the water tube to the engine or 2- the adaptor that seals the midsection to the lower unit has been installed incorrectly, the seals on the adaptor are gone (most common), or the adaptor was not reinstalled, the one thing I … 27 thg 10, 2012
What kind of oil goes in a lower unit?
You can use any brand of lubricant that has a grade designation of API GL5 SAE 80 or 90 weight. Make sure you do not mix different oil brands or weights. into the BOTTOM drain hole. Then slowly squeeze the bottle to force the oil into the lower unit.
How much oil does a lower unit hold?
How much gear oil does a lower unit hold? Lower Unit Oil Needed by Model Model Approximate Fluid Ounces Required 25 (4-stroke) 9.5 fl oz 30 (2-stroke) 14.5 fl oz 30 (4-stroke) 9.5 fl oz 27 thg 10, 2020
Do I need to drain lower unit oil to change impeller?
Yes, you will need to drain the lower unit fluid. 11 thg 5, 2010
How do I know if my gimbal bearing is bad?
Your gimbal bearing will make the most noise when turning the boat. Will be a low pitched growl. Noise will usually subside some after several shots of grease to the gimbal zerk on the starboard side of the transom housing. A bad gimbal bearing will make noise anytime engine is running. 4 thg 6, 2012
Are mercury lower units interchangeable?
Are Mercury and Mariner lower units interchangeable? No. Different type lower. It doesn’t have to be a black max, and it can be a mercury or mariner. 1 thg 9, 2020
Should prop spin freely neutral?
some prop spin in neutral is normal, as long as it is just going slowly, gear not going into neutral may be an adjustment or a repair. Just the fact the driveshaft is turning down there can get the lower unit oil moving and that will cause a prop to spin. 7 thg 12, 2010
Can you fix a spun prop?
A hub can spin inside of a prop due to damage to the hub, damage to the inside diameter of the propeller or incorrect propeller installation. Fixing a spun propeller will require the assistance of a boat propeller repair shop to press the old hub out of the propeller and the new hub into the propeller.
What type of oil goes in a Mercury lower unit?
Mercury Premium SAE 80W90 Gear Lube is recommended for lower units for outboards below 75 horsepower. Mercury Premium SAE 80W90 Gear Lube should not be mixed with Mercury High-Performance SAE 90 Gear Lube. 26 thg 1, 2017
How much does it cost to rebuild a marine diesel engine?
How Much Does A Diesel Rebuild Cost? It generally costs between $2,000 and $4,000 to rebuild an engine. 15 thg 2, 2022
How long do marine engines last?
The average marine gasoline engine runs for 1,500 hours before needing a major overhaul. The average marine diesel engine will run for more than three times that long and log an average 5,000 hours under the same conditions.
How long will a marine diesel engine last?
5,000 hours Fortunately, resilience is one of the defining features of a diesel engine. Even in this challenging environment, the life expectancy of a marine diesel engine is an impressive 5,000 hours on average. With attentive maintenance, that lifespan can reach 8,000 hours. 16 thg 12, 2019
How much does it cost to rebuild a 5.0 Mercruiser?
From my research on the web, a 5.7Lt rebuilt replacement should cost under $3000 per engine, plus labor – 5.0Lt around $2200.. 4 thg 11, 2015
How much is a new motor for a pontoon boat?
There is a wide variety of outboard engines ranging anywhere from 25HP to 450HP which will run approximately $6,000-$80,000 just for the engine. The higher the horsepower, the more expensive the engine. Some pontoon manufacturers also offer the option of having two engines on the boat. 10 thg 12, 2020
How much does a Yanmar Diesel Engine cost?
The prices may range from $6 to $7. For the engine (Yanmar) and installation, you need to budget $5,000. … How Much Is A New Yanmar? Model Name Model Price in the USA Yanmar SA324 Garden Tractor $ 21,399 USD (approx) Yanmar SA424 Garden Tractor $ 24,321 USD (approx) 2 hàng khác • 16 thg 2, 2022
Is it worth rebuilding a boat motor?
The outboard engine is too old, parts are likely scarce, and the technology is dated. If it’s an ’80s engine with some or all the features previously mentioned, and a new engine is out of the question, rebuilding can be a good option that will add years to your old outboard’s life. 30 thg 10, 2019
How much does it cost to rebuild an outboard motor?
During a typical engine rebuild, parts and labor costs are in the range of $2,500 to $4,000. It usually involves just replacing bearings and seals and then removing the engine, obviously replacing the seals and bearings, before re-installing the engine in its original installation. 11 thg 2, 2022
How long does a rebuilt outboard last?
A typical estimate from the industry is that an outboards motor last around 1,500 hours of operation. Assuming the average owner uses their boat 200 hours a year, this would mean that the motor would last between seven and eight years. That sounds about right in my experience. 6 thg 5, 2021
What color should lower unit oil be?
What Color Should Lower Unit Gear Oil Be? Brand new gear oil should be a shade of blue, green, brown, or yellow, depending on the brand. Used gear oil should be a black/dark variation of the brand new color. Knowing what these colors mean and also the other colors you will encounter is important.
How much does it cost to repair a lower unit?
A typical set of parts for the gearcase can cost $500-600 and may go higher if the gearcase is severely damaged. If you have your local mechanic repair the lower unit, his labor will run about $300-400 for this type of repair.
What happens if water gets in lower unit oil?
You have to change that oil and find out were it is leaking, If the problem is not address the water will ruin the lower unit gears, (drain the oil/water mix and put fresh oil back in). The lower unit needs to come off the engine, the water pump seals and area need to be checked so have your pump changed/replaced. 6 thg 11, 2006
What does Milky lower unit oil mean?
Milky oil means water has gotten into the lower unit. It is usually a bad propshaft seal, rather than a waterpump seal. But it is a job for your local shop. They’ll replace the seals and pressure check the lower unit. They’ll also be able to tell you if anything more than seals is required. 11 thg 5, 2008
Why is my lower unit oil milky?
That milky color and consistency is most likely due to water intrusion. It will not break down from use and get lighter, like other oils as it breaks down and gets used it darkens. Time to change seals and when you do your water pump do the whole kit and not just the impeller. 26 thg 2, 2019
How do you test an outboard water pump?
How Do You Test an Outboard Water Pump? On many outboards, you can simply put on the muffs and start the engine. You should see a steady stream of water coming out of the holes on the top of the engine. However, some brands do pump out a stream, but it might not look steady.
What causes water in lower unit of outboard motor?
This is usually caused by a leaky seal due to fishing line or other fine debris that got wrapped around your prop shaft. If you have water in your oil, don’t finish the oil change because water will just seep back in when you get out on the water. 11 thg 6, 2015
Why is my lower unit oil grey?
Gray in the lower unit oil is indicative of metal shavings coloring the oil. In the case of gear work; or even a power head replacment, it is not unusual to have a bit more than average shavings work loose as all the parts seat in. 27 thg 10, 2005
Why is my gear oil grey?
The grey color in the transmission oil is clutch friction plate material, not water. Water will make it a milky color… Inspect that the clutch cable and mechanisms are operating properly. Next, check your friction plates to make sure they are all in spec. 1 thg 3, 2010
What are symptoms of dirty transmission?
6 Signs Your Transmission Fluid is Bad and Needs Changing Dirty transmission fluid. Transmission whining noise. Gears slipping. Can’t go into reverse gear. Slipping out of gear. Engine running hot. Grinding noise. 25 thg 1, 2021
How do I know if my gearbox needs replacing?
Signs Your Car Needs Gearbox Repair Problems shifting gears. If you’re encountering hesitation or resistance when putting the car into gear or a jerking motion when shifting gears, this is a sign that something is wrong with the transmission system. … Unusual noises. … Leaking fluid. … A burning smell. 7 thg 5, 2020
Can you fill lower unit oil from top?
This. Adding from the top, with the bottom buttoned up so oil doesn’t drain right back out, creates an air pocket. It is a pain filling from the bottom though… Yep, if there isn’t oil in the LU, then there is air. 6 thg 10, 2012
How do I know if my Mercruiser lower unit is bad?
Bad outboard lower units can give the operator shifting issues, and other signs will include water in the gear lube, metallic particles on the drain screw magnet, clunking sounds when shifted, or the loss of the ability to shift into gears.
Why is my prop leaking oil?
The oil that this boater was seeing is probably partially burned 50:1 oil from the engine powerhead. This mixture of oil and carbon builds up in the exhaust chamber of the engine, and eventually will wash off and drain out. The result is a very black oily sludge coming from the propeller.
How often should you change lower unit oil?
every 100 hours Most sterndrive and outboard manufacturers advise you to change the gearcase oil in your lower unit every 100 hours or once a year (whichever comes first). Clean oil is critical for protecting the heavily loaded gears in your lower unit and preventing expensive damage. 24 thg 6, 2019
How much oil does a lower unit hold?
How much gear oil does a lower unit hold? Lower Unit Oil Needed by Model Model Approximate Fluid Ounces Required 25 (4-stroke) 9.5 fl oz 30 (2-stroke) 14.5 fl oz 30 (4-stroke) 9.5 fl oz 27 thg 10, 2020
Can you use regular gear oil in an outboard?
So, can you use any old gear lube in your marine lower unit? If you want the best protection possible, and want your lower unit to last as long as your boat, then the answer is no. Consult your engine’s manual and look for the proper marine gear lube for your application. 1 thg 5, 2019
Can you run an outboard motor out of the water?
Can Outboard Motor Run Out Of Water? It is never a good idea to start an outboard motor without a water supply – it must either be in the water or connected to a hose. When the motor is run without a water supply for even a few seconds, the vanes of the rubber water pump impeller can be damaged or destroyed. 3 thg 12, 2021
How often should an outdrive be serviced?
Annual Service Most outboard, sterndrive and gasoline inboard engines require basic service every 100 hours or annually.
How much does a new outdrive cost?
New 2022 Mercury BRAVO-3 CLASSIC (Early Design) Outdrive – $7,595.00.
How often should you grease a gimbal bearing on a boat?
Changing the oil every year is the right thing to do as well as greasing the prop shaft. One item you are missing is the removal of the lower unit and greasing the u-joints. The grease fitting on the side is to grease the gimbal bearing. 17 thg 3, 2009
How often should bellows be replaced?
every two years Inspect the bellows annually and replace it every two years. Many, myself included, feel that if the drive is removed for inspection, you may as well just replace the bellows while you’re at it. 14 thg 4, 2010
What does a gimbal bearing on a boat do?
Gimbal bearings are specialty ball bearings/races. One of their main marine uses is in boat engine drive shafts where the bearings maintain alignment using gimbal technology. A gimbal bearing and a driveshaft arrangement is shown below. 21 thg 4, 2011
Can you run an outboard motor without the lower unit?
You can run it as long as needed that way. I have run the outboard hooked up to the garden hose for a few seconds before without issues…just wondering if you can run it with the l/u off…. 10 thg 12, 2017
How do you know if you spun a hub?
To tell if your hub has spun, mark a line on the back of the prop hub with lipstick. You can also score your mark using a file. With the mark in place over the inner and outer hub, it’s a simple matter to pull the prop and see if the mark has broken in two. If it has, you have spun a hub. 10 thg 2, 2020
Does a boat prop spin in neutral?
some prop spin in neutral is normal, as long as it is just going slowly, gear not going into neutral may be an adjustment or a repair. Just the fact the driveshaft is turning down there can get the lower unit oil moving and that will cause a prop to spin. 7 thg 12, 2010
Why is my boat running high rpm?
Cold water is denser than warm water and causes you boat to ride higher out of the water. As a result, your boat has less drag and goes faster. Since it goes faster, the motor also runs faster. Since the air is colder, the air is denser. 16 thg 5, 2011
Why does prop spin freely when in gear engine off?
Your prop will rotate in one direction freely whether in forward or reverse. If it spins freely in both directions and was working fine before you changed the pump, your shift linkage is out of adjustment. Shift adjustments vary from one engine to the other. 9 thg 4, 2011
How tight should boat prop be?
The prop nut should be pretty darn tight. I dont use a torque wrench on mine but I crank it down good. Use a block of wood between the propeller blade and lower unit to hold the prop from turning while you tighten it. 10 thg 7, 2012
How do you test a boat propeller?
Checking Prop Pitch Head to a calm, open expanse of water and take your boat up to wide open throttle (WOT). Trim the motor up to reach maximum speed. This will be the point just before the prop loses bite and the speed begins to fall off. Note the motor’s RPM while at top speed/WOT.
What is spinning a prop?
A spun propeller means that the prop hub has spun inside the propeller. Once the hub spins inside of the propeller, the propeller will spin freely and not along with the hub. A hub can spin inside of a prop due to damage to the hub, damage to the inside diameter of the propeller or incorrect propeller installation.
What does spinning a prop mean?
If we want to give a short definition of a “spun” propeller, we would say that it is the weakness of responsiveness to the rotation of our engine’s propshaft which is due to the detachment of the rubber hub of the propeller and to its following wear because of the friction and temperature increase.
Why wont my boat go any faster?
Have you checked your propeller for debris? It’s not uncommon for fishing line, rope, seaweed or other debris to entangle itself around the blade, restricting it’s normal movement. Cutting away any entangled debris such as this should solve your problem. Another possible cause is an air leak in the fuel line.
How do I check my lower unit gear oil?
Tips If a bit of oil drains from the vent hole of the outboard lower unit, rub it between your thumb and forefinger. There will be a few tiny metal shavings, smaller than a grain of sand, in the oil; that’s normal gear wear. … If the oil coming from the vent is milky, that’s the result of water in the oil.
How much oil does a MerCruiser lower unit take?
Brand Model Oz./Qts. Mercury/Mariner 225/250/275/300 Verado 28.7 MerCruiser Alpha One Gen II 1.22 US Quarts MerCruiser Alpha One Gen II 2.0 US Quarts MerCruiser Alpha One Gen II 1.75 US Quarts 28 hàng khác
How does water get into lower unit?
You have seals on both sides of your water pump. You can have a warped lower unit which will allow water to seep in; even with new seals. You can have a touch or roughness on a seal seat that doesn’t let a seal seal. Take the lower unit to a “good” dealer and have them go through your lower unit. 10 thg 9, 2011
Why is my lower unit oil milky?
That milky color and consistency is most likely due to water intrusion. It will not break down from use and get lighter, like other oils as it breaks down and gets used it darkens. Time to change seals and when you do your water pump do the whole kit and not just the impeller. 26 thg 2, 2019
Can I use regular gear oil in my lower unit?
You can use any brand of lubricant that has a grade designation of API GL5 SAE 80 or 90 weight. Make sure you do not mix different oil brands or weights. into the BOTTOM drain hole. Then slowly squeeze the bottle to force the oil into the lower unit.
Is it cheaper to rebuild or replace an engine?
A scheduled overhaul is almost always less expensive than a new engine. Rebuilding to repair is usually cheaper than buying a new engine, too. You may save up to half of the cost of a new engine by rebuilding. However, sometimes rebuilding is not a good option. 24 thg 5, 2021
When should a marine engine be rebuilt?
After 5,000 hours, yacht owners can choose between rebuilding their engine fully or partially. Most marine engines don’t get fully worn out. What’s more common is for one or a few parts to start malfunctioning. 16 thg 1, 2020
Is 500 hours on a boat motor a lot?
500 hours on a boat is not a lot. In fact, 500 hours is a sweet spot to buy/sell a boat. If the boat is used around 30-100 hours each year, a boat with 500-hours is a good pick because 30-100 hours each year imply the owner probably would have done annual maintenance; otherwise, the boat couldn’t get that long.
Is it OK to run boat at full throttle?
No it’s not bad on the motor. All outboards are designed for continuous WOT operation. Of course, your fuel economy may suffer! If everything is rigged correctly, I know of no reason why it should be of great concern.
How much does it cost to rebuild a marine diesel engine?
How Much Does A Diesel Rebuild Cost? It generally costs between $2,000 and $4,000 to rebuild an engine. 15 thg 2, 2022
What is a lot of hours on a marine diesel?
Diesel engines when maintained properly can give you 6,000 to 8,000 hours of good use before needing a major overhaul. This means, some diesel engines can easily last the full lifetime of the boat. When making a choice of engine type, most boaters who choose a diesel do so for their durability. 12 thg 4, 2021
How many hours on a marine diesel before rebuild?
5,000 hours The average marine gasoline engine runs for 1,500 hours before needing a major overhaul. The average marine diesel engine will run for more than three times that long and log an average 5,000 hours under the same conditions.
What is the most reliable diesel marine engine?
Known to be one of the most reliable diesel engines out there, the 3L Powerstroke still has plenty of performance potential. Also, it is easy for any application to run as it can deliver up to 235 horsepower and 500 pounds of torque. 10 thg 2, 2022
What is a lot of hours on a diesel engine?
A properly maintained diesel engine lasts anywhere between 6,000 to 8,000 hours before need for repairs. When the engine lasts longer on a boat, some diesel engines are good at working long hours. They are well-suited for boats because they must be durable for long periods of time. 19 thg 2, 2022
How many hours will a 5.0 MerCruiser last?
If you do, you should get more than 4-5 years unless you’re boating in the saltiest of waters. I have a 5.0 with 775 hours still runs good. As said, you need to keep up with maintenance. Salt or fresh, closed cooling vs raw water cooling make a big difference. 27 thg 8, 2015
How much does it cost to put a new engine in a boat?
So if you are one of these lucky ones, your engine replacement will cost around $5,000 if you either want something smaller or get a good deal. $10,000 is the top of the range estimate you will have to pay in case you are looking for more power, and/or fancy one of the bigger manufacturer brands.
How much does a new inboard motor cost?
Inboards typically require between $1,000 and $1,500 in costs. As long as the boat is equipped with an engine that is capable of 5 to 10 horsepower, nothing much can prevent a sailboat from docking successfully. Easy to maintain, the engines are easy to run and inexpensive. 23 thg 2, 2022
How much does a new 150 hp outboard cost?
How Much Does A 150 Hp Outboard Cost? $15,305. Although there have been many legendary Yamaha four-stroke engines since the creation of the F150 in 1915, the F150 is one of the strongest, fastest and lightest four-stroke boats ever sold. No other pontoons or flats boat ever exceed the F150 for reliability. 15 thg 2, 2022
How much does a 75 hp outboard motor cost?
How much does a 75 hp outboard cost? Horsepower (HP) Price Range 50 $6,000 to $7,000 60 $6,500 to $7,500 70 $7,200 to $8,000 75 $7,300 to $8,300 17 thg 9, 2019
How much does it cost to install a diesel engine?
The cost of replacing a diesel engine typically ranges between $5,500 and $11,000. 12 thg 2, 2022
How much does it cost to rebuild an outboard lower unit?
Rebuilding your engine will cost around $2,500. That difference of $1,000 to $2,000 will buy a lot of gas, so consider carefully. 30 thg 10, 2019
How much does it cost to rebuild a lower unit?
A typical set of parts for the gearcase can cost $500-600 and may go higher if the gearcase is severely damaged. If you have your local mechanic repair the lower unit, his labor will run about $300-400 for this type of repair.
How often should I change lower unit oil?
Most sterndrive and outboard manufacturers advise you to change the gearcase oil in your lower unit every 100 hours or once a year (whichever comes first). Clean oil is critical for protecting the heavily loaded gears in your lower unit and preventing expensive damage. 24 thg 6, 2019
What are the most reliable outboard motors?
So before you make any moves, be sure to check out these best-of-the-best outboard engines. Yamaha V-Max SHO 115 – Best Mid-Size Outboard For Acceleration. … Yamaha F250 – Most Reliable Outboard. … Suzuki DF350A – Most Efficient Design. … Mercury Racing 450r – Best High-Performance Racing Outboard. Mục khác… • 11 thg 5, 2021
How many hours will a 2 stroke outboard last?
A typical two-stroke or four-stroke outboard engine should provide 1,500 hours of run time. Based on the average use of 200 hours per year, this will last 7-8 years. However, changing your oil every 50 hours of operation and regularly flushing the engine can see your outboard engine last 10 to 20 years. 6 thg 5, 2021
Are Mercury 4 strokes reliable?
4-stroke engines are more reliable, fuel-efficient, and quieter but heavier and slower in general. Constant development, in particular by Mercury Marine, has narrowed the performance and maintenance differences on the two different styles, but the general perception remains mostly accurate. 5 thg 8, 2021
What color is lower unit oil?
A greyish milky color to your lower unit oil indicates water in the oil. Unless it is excessive, on an older motor, this is normal and why you drain it, and replace it, before it freezes. 12 thg 11, 2007
Can you fill lower unit oil from top?
This. Adding from the top, with the bottom buttoned up so oil doesn’t drain right back out, creates an air pocket. It is a pain filling from the bottom though… Yep, if there isn’t oil in the LU, then there is air. 6 thg 10, 2012
What type of oil goes in a Mercury lower unit?
Mercury Premium SAE 80W90 Gear Lube is recommended for lower units for outboards below 75 horsepower. Mercury Premium SAE 80W90 Gear Lube should not be mixed with Mercury High-Performance SAE 90 Gear Lube. 26 thg 1, 2017
How much oil does a lower unit hold?
How much gear oil does a lower unit hold? Lower Unit Oil Needed by Model Model Approximate Fluid Ounces Required 25 (4-stroke) 9.5 fl oz 30 (2-stroke) 14.5 fl oz 30 (4-stroke) 9.5 fl oz 27 thg 10, 2020
Why is lower unit oil black?
If it does stink that’s just an indication of very old worn out oil . Assuming no water or shavings, drain it, flush it , refill it , and enjoy it .. if it had water in it the oil would be milky. black is good just drain it and refill with new oil just make sure you change the little gasket with new one. 27 thg 5, 2017
Why is my lower unit oil black?
The black lube and burnt smell,just means overdue. Nothing worse then the smell of burnt lower unit fluid,cause of a gear failure.It used to clean a few guys out of our shop. Biggest thing to look for is metal shavings or evidence of water. 24 thg 11, 2014
Can you run an outboard motor without the lower unit?
You can run it as long as needed that way. I have run the outboard hooked up to the garden hose for a few seconds before without issues…just wondering if you can run it with the l/u off…. 10 thg 12, 2017
What does water in gear oil look like?
It’s unusual for industrial gear oil to have a milky appearance because it has good water separation properties. Free water should be settling down to the bottom of the reservoir tank, which can easily be drained out. However, it is possible for water to contaminate a gear box. 23 thg 2, 2016
Will water separate from gear oil?
The time it takes the water to separate will depend on the system’s temperature, as well as the additive formulation, age of the oil and the base oil type. Some oils are designed to hold water in suspension rather than to allow it to separate out, making gravity separation a less-than-effective strategy.
What causes water in lower unit of outboard motor?
This is usually caused by a leaky seal due to fishing line or other fine debris that got wrapped around your prop shaft. If you have water in your oil, don’t finish the oil change because water will just seep back in when you get out on the water. 11 thg 6, 2015
Are mercury lower units interchangeable?
Are Mercury and Mariner lower units interchangeable? No. Different type lower. It doesn’t have to be a black max, and it can be a mercury or mariner. 1 thg 9, 2020
What does bad gear oil look like?
Grey is definitely a bad sign. If you have grey gear oil, that means metal, a serious amount of metal! Grey means that a gear, bearing, or another component has failed inside of the gear case and then was ground to powder, and mixed into the gear lube. Grey is usually a sign that the gear case is blown up.
Why is my lower unit oil grey?
Gray in the lower unit oil is indicative of metal shavings coloring the oil. In the case of gear work; or even a power head replacment, it is not unusual to have a bit more than average shavings work loose as all the parts seat in. 27 thg 10, 2005
How do you clean a lower unit?
Simple Green Water Spot Remover works great for getting it off. Some say distilled vinegar in a 50/50 solution with water works as well but I haven’t tried that. Spray it down heavily, scrub it, then rinse THOROUGHLY. Then wax the midsection and lower cowling. 11 thg 9, 2010
Why is gear oil yellow?
Gearbox Oil & Yellow Metals Sulphur is added because it forms a protective coating and it increase the oil’s slipperiness. So, sulphur forms a protective coating, and then eats away the bronze.
How do I know if my boat water pump is bad?
Signs of a bad boat impeller are either boat engine overheats when you try to accelerate, loss in impeller vanes flexibility, physical wear & tear like cracks in impeller vane roots, melted or worn of vanes. Even if you see less or no water coming out of tell-tale, it might be due to a bad impeller.
How can u tell if water pump is bad?
5 Symptoms of a Failing Water Pump Coolant Leaking. One of the first signs of a potentially faulty water pump is a puddle of coolant on the ground where you’ve parked your car. … Rust or Deposit Build-Up. … Noise. … Overheating. … Steam. 26 thg 10, 2020
Why is my lower unit leaking oil?
The problem will be simple to see once the lower unit is pulled. It also could be that your new gear case has a blown seal , especially if it was overfilled . The seal below the water pump can get sucked in when it cools if there is too much lube in it because of not enough airspace for expansion … 22 thg 11, 2016
Can I use regular gear oil in my lower unit?
You can use any brand of lubricant that has a grade designation of API GL5 SAE 80 or 90 weight. Make sure you do not mix different oil brands or weights. into the BOTTOM drain hole. Then slowly squeeze the bottle to force the oil into the lower unit.
What does Milky lower unit oil mean?
Milky oil means water has gotten into the lower unit. It is usually a bad propshaft seal, rather than a waterpump seal. But it is a job for your local shop. They’ll replace the seals and pressure check the lower unit. They’ll also be able to tell you if anything more than seals is required. 11 thg 5, 2008
What color should gear oil be?
Healthy transmission fluid should be relatively clear or pink in color. If your transmission fluid is deep red or brown, your transmission fluid is old and most likely causing extra damage within your transmission. If it is dark brown, that is a sign you have burnt transmission fluid from overheating. 4 thg 11, 2019
Should I change brown transmission fluid?
Brown/Dark Brown Once the transmission fluid turns brown, which is usually at about 30,000 miles, it’s time to change it. The brown transmission fluid will become opaque, which means you can’t see through it anymore. 15 thg 6, 2021
What color is manual transmission fluid?
Manual transmission fluid, like engine oil, is generally brown to amber in color. Commonly recommended manual transmission fluid formulations include SAE 80W, 75W-90, 80W-90 and SAE 90. In some cases, a multi-grade engine oil or automatic transmission fluid may be recommended.
What are the signs you need a new transmission?
What Are the Transmission Failure Symptoms? Refusal to Switch Gears. If your vehicle refuses or struggles to change gears, you are more than likely facing a problem with your transmission system. … Burning Smell. … Noises When in Neutral. … Slipping Gears. … Dragging Clutch. … Leaking Fluid. … Check Engine Light. … Grinding or Shaking. Mục khác… • 16 thg 3, 2017
How do you know if your gearbox oil needs changing?
6 Signs Your Transmission Fluid is Bad and Needs Changing Dirty transmission fluid. Transmission whining noise. Gears slipping. Can’t go into reverse gear. Slipping out of gear. Engine running hot. Grinding noise. 25 thg 1, 2021
Can transmission fluid get low without a leak?
Considerations. If your automobile’s transmission fluid gets too low, it usually means that it has a leak in its transmission system. This is because transmission fluid does not gradually burn away, like engine oil. It can only be lost through leakage.
What is the most common cause of gear failure?
Gear failure can stem because of many reasons but is mostly caused due to the most ordinary issues. … Gear failure cause statistics: 34.4% – Inadequate lubrication. 19.6% – Contamination. 17.7% – Installation errors. 6.9% – Overload. 2.8% – Handling errors. 9 thg 12, 2019
How do you check a gearbox?
Methods for Inspecting a Gearbox Visual walkaround. Visual inspection through inspection ports. Borescope inspection. Measure temperature. Thermometers. Resistance temperature detector (RTD) probes. Thermography. Measure oil pressure. Measure sound and vibration. Inspect filter elements.
How much does a gearbox cost to replace?
Namely the type of gearbox that you need and whether or not it is a manual or automatic gearbox. (Automatic and 4WD gearboxes are more expensive.) On average expect to pay between $1000-1500.00 for most reconditioned gearboxes, plus any labour/installation costs to install. 24 thg 2, 2014
How often should you change your lower unit oil?
every 100 hours Most sterndrive and outboard manufacturers advise you to change the gearcase oil in your lower unit every 100 hours or once a year (whichever comes first). Clean oil is critical for protecting the heavily loaded gears in your lower unit and preventing expensive damage. 24 thg 6, 2019
How much does it cost to repair a lower unit?
A typical set of parts for the gearcase can cost $500-600 and may go higher if the gearcase is severely damaged. If you have your local mechanic repair the lower unit, his labor will run about $300-400 for this type of repair.
Do I need to drain lower unit oil to change impeller?
Yes, you will need to drain the lower unit fluid. 11 thg 5, 2010
What causes lower unit failure?
Just random failures due to normal wear and tear. Wear and tear over time. Fishing line around prop shaft damaging seal and allowing gear lube to leak out or water to get in. Impact when a propeller hits bottom. 17 thg 8, 2019
Can you start a Mercruiser without water?
It is not recommended to start a boat without water. In most outboard and inboard engines, impellers (rubber pumps) are used to circulate water to the cooling system of the boat. If the impeller does not have water to cool off and lubricate, it will heat up very quickly and possibly damage itself. 1 thg 12, 2021
Why is my lower unit oil black?
The black lube and burnt smell,just means overdue. Nothing worse then the smell of burnt lower unit fluid,cause of a gear failure.It used to clean a few guys out of our shop. Biggest thing to look for is metal shavings or evidence of water. 24 thg 11, 2014
Why is lower unit oil black?
If it does stink that’s just an indication of very old worn out oil . Assuming no water or shavings, drain it, flush it , refill it , and enjoy it .. if it had water in it the oil would be milky. black is good just drain it and refill with new oil just make sure you change the little gasket with new one. 27 thg 5, 2017
What is a stuffing box on a boat?
Stuffing Box. If your boat has inboard power, odds are it is fitted with a stuffing box to provide a watertight seal for the propeller shaft. Stuffing boxes are also used to seal rudder stocks that penetrate the hull below the waterline. In principle a stuffing box is identical to the packing nut on a common faucet.
Can you repack a stuffing box in the water?
Although it’s possible to change the packing with the boat in the water, we recommend against that. Do it with the boat on the hard, especially if this is your first time.
What causes water in lower unit of outboard motor?
This is usually caused by a leaky seal due to fishing line or other fine debris that got wrapped around your prop shaft. If you have water in your oil, don’t finish the oil change because water will just seep back in when you get out on the water. 11 thg 6, 2015
How does a stuffing box work?
A stuffing box—also called a stuffing gland, packing gland or packing box—forms a seal between the prop shaft and the hole in the hull through which the shaft passes while allowing the shaft to turn freely. It consists of a threaded sleeve and a hollow nut, through which the prop shaft passes. 30 thg 6, 2020
Why is oil coming out of my propeller?
This one is easy, if engine oil is leaking, the propeller needs to come off and be inspected by a prop shop. This condition means oil is leaking around the internal piston and is filling the hub cavity. Keep in mind, engine oil is pressure fed into the propeller to control the blades. 8 thg 4, 2016
What is a prop seal?
The prop-shaft seal keeps the water out and lubricates the shaft at its point of exit from the hull. 1 thg 8, 2018
How do you find the lower unit?
Tips If a bit of oil drains from the vent hole of the outboard lower unit, rub it between your thumb and forefinger. There will be a few tiny metal shavings, smaller than a grain of sand, in the oil; that’s normal gear wear. … If the oil coming from the vent is milky, that’s the result of water in the oil.
How do you test a water pump on an outboard motor?
How Do You Test an Outboard Water Pump? On many outboards, you can simply put on the muffs and start the engine. You should see a steady stream of water coming out of the holes on the top of the engine. However, some brands do pump out a stream, but it might not look steady.
Can you fill lower unit oil from top?
This. Adding from the top, with the bottom buttoned up so oil doesn’t drain right back out, creates an air pocket. It is a pain filling from the bottom though… Yep, if there isn’t oil in the LU, then there is air. 6 thg 10, 2012
What color should lower unit oil be?
What Color Should Lower Unit Gear Oil Be? Brand new gear oil should be a shade of blue, green, brown, or yellow, depending on the brand. Used gear oil should be a black/dark variation of the brand new color. Knowing what these colors mean and also the other colors you will encounter is important.
What type of oil goes in a Mercury lower unit?
Mercury Premium SAE 80W90 Gear Lube is recommended for lower units for outboards below 75 horsepower. Mercury Premium SAE 80W90 Gear Lube should not be mixed with Mercury High-Performance SAE 90 Gear Lube. 26 thg 1, 2017
What is the difference between marine gear lube and regular gear lube?
Marine gear lube, unlike automotive gear lube, is formulated to emulsify water. This serves two purposes: It provides consistent lubrication, keeping water away from moving parts. It keeps the lower unit from freezing (yours didn’t freeze last winter, did it?) 1 thg 5, 2019
How do you flush lower unit gear oil?
I’d use a lighter weight oil or transmission fluid, then run it just a little on muffs in the driveway. Shift it in and out of gear a few times. The lighter weight oil should help pull the water out of the unit. 23 thg 4, 2010
What happens if you start a boat motor out of water?
What Happens If You Run A Boat Motor Without Water? In the absence of water to cool the engine, it will rapidly overheat inside the cowling (the cover) and will likely seize up or blow a gasket as the oil will lose its lubricating properties as it heats up. 29 thg 11, 2021
How long can a boat motor sit without running?
One of the most commonly-asked questions we get is, “Is it okay if my boat isn’t running for a while in Fort Lauderdale, FL?” The answer is yes—but you have to do some maintenance beforehand. As long as it’s well maintained before going into storage, a boat can sit for a few months, a few years or even a few decades.
Do new Yamaha outboards come with lower unit oil?
When your new outboard arrives, you simply add engine oil (amount and type are shown on page 1 of manual). The lower unit gear lube is pre-filled from the factory.
How much oil does a lower unit hold?
12.5 fl oz STEP Lower Unit Oil Needed by Model Model Approximate Fluid Ounces Required 15B & C (4-stroke) 12.5 fl oz 18 (2-stroke & 4-stroke) 12.5 fl oz 20 (4-stroke) 12.5 fl oz 35 hàng khác
How much is a new MerCruiser outdrive?
ALPHA Gen One STERNDRIVE – MerCruiser Classic (NEW) $3,139.00.
Can you rebuild an outdrive?
Refurbished Replacement Outdrives Refurbished outdrives can cost quite a bit less, but can still come with a warranty for your peace of mind. Jasper Marine remanufactures both engine and outdrives and rebuilds their products to at least OEM specs.
How do you know your outdrive is bad?
Bad outboard lower units can give the operator shifting issues, and other signs will include water in the gear lube, metallic particles on the drain screw magnet, clunking sounds when shifted, or the loss of the ability to shift into gears.
How often should bellows be replaced?
every two years Inspect the bellows annually and replace it every two years. Many, myself included, feel that if the drive is removed for inspection, you may as well just replace the bellows while you’re at it. 14 thg 4, 2010
How do you check a boat bellows?
Look for any signs of moisture on the bottom of the u-joint bellow. With the drive full trimmed up turn hard to the left. This will give you excellent access to inspect the shift bellow. Pull the outdrive to check the alignment and check for any signs of moisture in the bellows and shift cavity. 17 thg 10, 2007
How do I know if my gimbal bearing is bad?
Your gimbal bearing will make the most noise when turning the boat. Will be a low pitched growl. Noise will usually subside some after several shots of grease to the gimbal zerk on the starboard side of the transom housing. A bad gimbal bearing will make noise anytime engine is running. 4 thg 6, 2012
What does a bellow do on a boat?
Bellows on a boat are flexible gaskets that protect your boat’s engine from water. They feature a watertight seal to prevent rusting and other issues. 22 thg 6, 2021
How often should you grease a gimbal bearing?
Changing the oil every year is the right thing to do as well as greasing the prop shaft. One item you are missing is the removal of the lower unit and greasing the u-joints. The grease fitting on the side is to grease the gimbal bearing. 17 thg 3, 2009
Do you have to remove outdrive to remove engine?
The shaft going to the stern drives the engine inboard and outside. Once the stern has been serviced, the outdrive must be removed if there was a leaking shaft or the engine fails. 27 thg 2, 2022
How much does it cost to repair a lower unit?
A typical set of parts for the gearcase can cost $500-600 and may go higher if the gearcase is severely damaged. If you have your local mechanic repair the lower unit, his labor will run about $300-400 for this type of repair.
Are mercury lower units interchangeable?
Are Mercury and Mariner lower units interchangeable? No. Different type lower. It doesn’t have to be a black max, and it can be a mercury or mariner. 1 thg 9, 2020
How long do outboard engines last?
A typical estimate from the industry is that an outboards motor last around 1,500 hours of operation. Assuming the average owner uses their boat 200 hours a year, this would mean that the motor would last between seven and eight years. 6 thg 5, 2021
What does a spun prop feel like?
But, when RPM is increased, the engine revs with little or no boat acceleration because the prop begins to spin. A spun hub feels like a loss of power with excessive RPM. You will likely feel the prop slipping at high RPM. 10 thg 2, 2020
Should prop spin freely neutral?
some prop spin in neutral is normal, as long as it is just going slowly, gear not going into neutral may be an adjustment or a repair. Just the fact the driveshaft is turning down there can get the lower unit oil moving and that will cause a prop to spin. 7 thg 12, 2010
How do I know if my boat prop is bad?
8 Clear Signs It’s Time to Replace Your Boat Propeller It Has Too Much Pitch. … It Doesn’t Have Enough Pitch. … It’s a Compromise Propeller. … You Damaged It in the Water. … It’s Made of Aluminum. … You Want to Go Faster. … You’re Losing Gas. … It’s Not the Right Diameter. 17 thg 5, 2019
Should prop spin while in gear with motor off?
No it shouldn’t be able to spin freely when it’s in gear. When u put it in forward and u turn it u should have to really pull on it to get it to go around. 9 thg 4, 2011
Will a bigger prop make my boat faster?
Increasing prop pitch will make the boat go faster (provided the engine has enough power to keep the RPMs in the optimum operating range. If the engine doesn’t have enough power to run a higher pitch prop, performance suffers across the board and you could easily damage your engine. 9 thg 6, 2015
How do you ruin a boat engine?
Here are some surefire ways to wreck your outboard motor so that you can avoid doing all of them and keep yours in good condition. Never Read the Owner’s Manual. … Use Cheap Gasoline. … Neglect Corrosion. … Ignore Odors. … Don’t Flush Out Your Engine. 8 thg 5, 2020
What happens if outboard motor is too low?
If the outboard is too low, it creates excessive drag, which cuts into speed and fuel efficiency. If it’s too high, the propeller tends to ventilate, losing its bite on the water and blowing out while turning and in steep seas. 3 thg 10, 2019
What happens if outboard is too high?
Too high usually results in low water pressure, prop letting go in turns, or lack of bow lift are usually the telltale signs. Sometimes porpoising is caused by too much bow lift and dropping the motor will give it more bite and make it worse. 28 thg 7, 2020
Can I put my boat in gear out of water?
There is no difference putting the motor in gear at idle in or out of the water. The prop shaft will actually spin the prop with less initial resistance than if the prop was in the water. 23 thg 7, 2016
How tight should Boat prop be?
The prop nut should be pretty darn tight. I dont use a torque wrench on mine but I crank it down good. Use a block of wood between the propeller blade and lower unit to hold the prop from turning while you tighten it. 10 thg 7, 2012
Does propeller spin in reverse?
When props go into reverse thrust, the engine & propeller continue to spin in the same direction, but the angle of the blades is changed so that the thrust vector is now in the opposite direction. That process CAN happen pretty quickly, so you have reasonably immediate reverse thrust available. 14 thg 9, 2015
Can you over tighten a boat propeller?
Hard to believe you would be over-tightening the prop nut as this spec is often around 50 ft lbs. Hand tightened or otherwise too loose may allow the prop to slam back in reverse with great force against the nut and possibly shear the securing cotter pin with potential eventual loss of the prop. 1 thg 5, 2016
Can you over torque a prop nut?
You cant over torque the prop nut. If you cant get it to align for the cotter pin to go in use another washer behined the nut or slightly sand the back side of the castle nut.
What does spin a prop mean?
A spun propeller means that the prop hub has spun inside the propeller. Once the hub spins inside of the propeller, the propeller will spin freely and not along with the hub. A hub can spin inside of a prop due to damage to the hub, damage to the inside diameter of the propeller or incorrect propeller installation.
How do you tell what pitch your propeller is?
The blades on a propeller are analogous to the threads on a screw. Some propellers have a constant pitch, meaning the pitch is the same at all points from the leading edge to the trailing edge of the prop blades. Progressive pitch starts lower at the leading edge and increases to the trailing edge.
How do I know what pitch prop I need?
Your propeller’s pitch is correct if the RPM you noted is right in the middle of the manufacturer’s recommended range. If the RPM is at the top of or above the recommended RPM range, you’ll need to choose a propeller with a larger pitch.
Where can I find prop size and pitch?
Propeller Sizes are given in a set of numbers, e.g. 13×17 or 19×23 usually labeled on the propeller. The first number is the Diameter (width of the circle of the blades) and the second is the Pitch (theoretical travel distance of the angled blades in one revolution). Two other design features include Rake and Cup.
Why is my boat running high rpm?
Cold water is denser than warm water and causes you boat to ride higher out of the water. As a result, your boat has less drag and goes faster. Since it goes faster, the motor also runs faster. Since the air is colder, the air is denser. 16 thg 5, 2011
Why does my outboard motor slip out?
If your motor is jumping out of gear then your clutch dog and your engagement points on your forward gear are worn out. To fix this you will need to drop the lower unit, tear her down and replace the clutch dog and forward gear Then reseal her, you are not likely to like the price of this at all! 21 thg 4, 2008
Why is my boat slow?
Have you checked your propeller for debris? It’s not uncommon for fishing line, rope, seaweed or other debris to entangle itself around the blade, restricting it’s normal movement. Cutting away any entangled debris such as this should solve your problem. Another possible cause is an air leak in the fuel line.
What causes a spun prop?
There are instances when the prop hub can become “spun” without impact. Older-style rubber hubs can become hard with age and begin to slip within the barrel, until they eventually are no longer firmly bonded to the prop. Exhaust heat can also deteriorate the rubber or Delrin material. 12 thg 3, 2021
What causes prop slip?
There are many factors that affect prop slip including the actual pitch of the propeller, the condition of the propeller, the design of the hull, the condition of the bottom of the craft, additional weight on the craft, distribution of weight, height the engine is mounted at, engine trim angle and setback, jack plate … 22 thg 10, 2014
Why does my boat bog down when I accelerate?
Another common reason why your engine is bogging down when you apply throttle is a clogged fuel filter. The fuel filter’s primary purpose is to strain out any debris and dirt that may reach the engine, but the fuel filter itself can become blocked if there is enough debris. 24 thg 6, 2021
Why does my outboard sputter at full throttle?
If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry.
Why does my boat bog down when I give it gas?
Even the smallest piece of debris that gets past the fuel filter can cause issues the further down the veins it manages to travel, as the veins get smaller and smaller in size. Eventually the blockage can cause a complete stoppage of fuel going into the engine, therefore causing it bog down and stop.
How often should you change lower unit oil?
every 100 hours Most sterndrive and outboard manufacturers advise you to change the gearcase oil in your lower unit every 100 hours or once a year (whichever comes first). Clean oil is critical for protecting the heavily loaded gears in your lower unit and preventing expensive damage. 24 thg 6, 2019
Can you fill lower unit oil from top?
This. Adding from the top, with the bottom buttoned up so oil doesn’t drain right back out, creates an air pocket. It is a pain filling from the bottom though… Yep, if there isn’t oil in the LU, then there is air. 6 thg 10, 2012
How do I know if my lower unit oil is bad?
Bad outboard lower units can give the operator shifting issues, and other signs will include water in the gear lube, metallic particles on the drain screw magnet, clunking sounds when shifted, or the loss of the ability to shift into gears.
Can I use regular gear oil in my lower unit?
You can use any brand of lubricant that has a grade designation of API GL5 SAE 80 or 90 weight. Make sure you do not mix different oil brands or weights. into the BOTTOM drain hole. Then slowly squeeze the bottle to force the oil into the lower unit.
How does water get into lower unit?
You have seals on both sides of your water pump. You can have a warped lower unit which will allow water to seep in; even with new seals. You can have a touch or roughness on a seal seat that doesn’t let a seal seal. Take the lower unit to a “good” dealer and have them go through your lower unit. 10 thg 9, 2011
Why is my lower unit leaking oil?
The problem will be simple to see once the lower unit is pulled. It also could be that your new gear case has a blown seal , especially if it was overfilled . The seal below the water pump can get sucked in when it cools if there is too much lube in it because of not enough airspace for expansion … 22 thg 11, 2016
Why is my lower unit oil milky?
That milky color and consistency is most likely due to water intrusion. It will not break down from use and get lighter, like other oils as it breaks down and gets used it darkens. Time to change seals and when you do your water pump do the whole kit and not just the impeller. 26 thg 2, 2019
What color should lower unit oil be?
What Color Should Lower Unit Gear Oil Be? Brand new gear oil should be a shade of blue, green, brown, or yellow, depending on the brand. Used gear oil should be a black/dark variation of the brand new color. Knowing what these colors mean and also the other colors you will encounter is important.
Why is my lower unit oil black?
The black lube and burnt smell,just means overdue. Nothing worse then the smell of burnt lower unit fluid,cause of a gear failure.It used to clean a few guys out of our shop. Biggest thing to look for is metal shavings or evidence of water. 24 thg 11, 2014
What does water in gear oil look like?
It’s unusual for industrial gear oil to have a milky appearance because it has good water separation properties. Free water should be settling down to the bottom of the reservoir tank, which can easily be drained out. However, it is possible for water to contaminate a gear box. 23 thg 2, 2016
What weight is outboard lower unit oil?
Following are different types of lower unit oils: 5W-30 Full-Synthetic—this is the best oil for high performing outboards. 10W-30 Mineral Base (conventional)—this is a universal oil ideal for almost all types of environments. 20W-40 Mineral Base (conventional)—for the larger outboards and warm climate this is best.
Is gear oil the same as gear lube?
All gear lubricants are definitely not the same. There are differences in the additive technology used for lubricants for each specification, and just because one type of gear oil works well for one type of gear application, that doesn’t mean it will work well for all. 1 thg 8, 2012
Is SAE 90 the same as 80W 90?
Can I use SAE 80W-90 instead of SAE 90w? Yes it is the same… close enough anyway. SAE 90 gear oil is equivalent to 50wt engine oil (SAE 80 = 30wt), so you could always dump that in instead if you want. 6 thg 3, 2020
Are Rebuilt engines as good as new?
Frequently, rebuilt engines are superior to even new car engines because better parts are used, or design changes in parts correct problems with the original engine. Rebuilt engines are dependable, reliable and are backed by the engine manufacturers warranty program.
When should I replace my engine?
In most cases with proper care, automobile engines are good for about 150,000 miles before they begin having serious engine problems, however there are times when you can have relatively new cars with much fewer miles and have the engine go bad. 13 thg 11, 2017
How many miles will a rebuilt engine last?
A rebuilt engine can last for upwards of 100,000 miles, even though it may not have the same life expectancy as the original. By doing this, you can extend the lifespan of your vehicle by as much as two years, and by doing regular maintenance, you can extend its life even further. 30 thg 11, 2021
How much does it cost to rebuild a marine diesel engine?
How Much Does A Diesel Rebuild Cost? It generally costs between $2,000 and $4,000 to rebuild an engine. 15 thg 2, 2022
How long do marine engines last?
The average marine gasoline engine runs for 1,500 hours before needing a major overhaul. The average marine diesel engine will run for more than three times that long and log an average 5,000 hours under the same conditions.
How long will a marine diesel engine last?
5,000 hours Fortunately, resilience is one of the defining features of a diesel engine. Even in this challenging environment, the life expectancy of a marine diesel engine is an impressive 5,000 hours on average. With attentive maintenance, that lifespan can reach 8,000 hours. 16 thg 12, 2019
Is 1000 hours a lot on a boat?
How many hours is good for a used boat? A used boat powered by an outboard motor or gas inboard with less than 1000 hours is a boat worth considering a purchase. A diesel-powered boat with 3000 to 5000 hours that has been maintained well is also a boat that may be worth owning. 15 thg 12, 2021
How do you check boat engine hours?
How Do You Check Boat Engine Hours? Engine hours can be checked by looking at the hour meter for older engines. Engines built in the last 20 years will store the hours on the engine computer and can be read via the gauge or a diagnostic computer.
How many hours is too much for a used boat?
The Key Takeaways. As a general rule, experts say that 1,500 hours on a boat is a lot. But actually, it differs a lot based on regular MAINTENANCE and USAGE. Regardless of the hours, a boat that is used around 30-100 hours each year and serviced annually would be a great pick than a boat used less or serviced rarely.
How long can a boat sit without running?
One of the most commonly-asked questions we get is, “Is it okay if my boat isn’t running for a while in Fort Lauderdale, FL?” The answer is yes—but you have to do some maintenance beforehand. As long as it’s well maintained before going into storage, a boat can sit for a few months, a few years or even a few decades.
What happens if outboard motor is too low?
If the outboard is too low, it creates excessive drag, which cuts into speed and fuel efficiency. If it’s too high, the propeller tends to ventilate, losing its bite on the water and blowing out while turning and in steep seas. 3 thg 10, 2019
How often should you run your boat?
A few hours every week keeps the motor in better shape than using it two or three full days every month. The more often it gets used, the better it will run, just like any vehicle. If it’s left sitting idle at the marina or in a garage for the majority of the time, parts tend to go bad faster.
Is it cheaper to rebuild or replace an engine?
A scheduled overhaul is almost always less expensive than a new engine. Rebuilding to repair is usually cheaper than buying a new engine, too. You may save up to half of the cost of a new engine by rebuilding. However, sometimes rebuilding is not a good option. 24 thg 5, 2021
When should a marine engine be rebuilt?
After 5,000 hours, yacht owners can choose between rebuilding their engine fully or partially. Most marine engines don’t get fully worn out. What’s more common is for one or a few parts to start malfunctioning. 16 thg 1, 2020
When should I rebuild my marine diesel engine?
When Should I Rebuild My Marine Diesel Engine? An engine that runs on a marine diesel usually lasts 5,000 hours before it has to be rebuilt significantly. Marine diesel engines usually last for 400 hours longer than typical marine gasoline engines. 18 thg 2, 2022
Is it OK to run boat at full throttle?
No it’s not bad on the motor. All outboards are designed for continuous WOT operation. Of course, your fuel economy may suffer! If everything is rigged correctly, I know of no reason why it should be of great concern.
What is the most reliable diesel marine engine?
Known to be one of the most reliable diesel engines out there, the 3L Powerstroke still has plenty of performance potential. Also, it is easy for any application to run as it can deliver up to 235 horsepower and 500 pounds of torque. 10 thg 2, 2022
How many hours can you put on a diesel engine?
How Many Hours Can A Diesel Engine Last? When properly maintained, diesel engines can last between 6,000 and 8,000 hours before needing major repairs. 2 thg 12, 2021
What is the life of diesel fuel?
between six and twelve months Under ideal conditions, diesel fuel can be stored between six and twelve months. To extend the life past twelve months, even under the best conditions, it needs to be treated with fuel stabilizers and biocides. 9 thg 5, 2013
What are high hours on a marine diesel engine?
On average, marine engines run this long: Outboard diesel motors usually run for more than 3,000 hours. Inboard marine diesels should run for an average of 5,000 hours. Well-maintained diesel engines run up to 8,000 hours.
How do you service a marine diesel engine?
How to service your marine diesel engine Primary Filter: drain the filter by loosening the plug at the bottom. Secondary filter bleed: slacken the screw on the filter until bubble-free fuel escapes. Lift pump lever: the lift pump pessurises the low pressure system. Mục khác… • 27 thg 11, 2014
How often should you change oil in a marine diesel?
about every 50 hours You should change the oil in a diesel engine about every 50 hours. The shorter interval is especially important for sailors who use their engines for only an hour or two per outing.
Is Beta Marine Kubota?
Beta Marine is a British marine diesel engine supplier that uses a Kubota block, and has no intention of introducing the technology any time soon on sub-100hp engines. 24 thg 9, 2021
Who make the best diesel engines?
In the Company of Greatness – 10 Best Diesel Engines The Cummins B-Series. The One That Paved the Way. … International DT466. Everything You Own Has Probably Been Moved by One. … Wartsila-Sulzer RTA96-C. … Caterpillar C12 Super Truck Racing Engine. … GM 6.6L Duramax. … International 7.3L Power Stroke. … MTU 16V-4000. … VW 5.0L V-10. Mục khác… • 26 thg 7, 2006
How many hours can a diesel truck run?
How Many Engine Hours Is Alot For A Diesel? The average diesel engine lasts between 6,000 and 8,000 hours while properly maintained, and requires much less work and money than gas engine replacements. 19 thg 2, 2022
How do you convert idle hours to miles?
Pull the data from the engine meter to determine how many hours the engine has run. Calculate the hours by a factor of 60 to approximate the miles accumulated on the engine. Formula: Engine hours x 60 = Approximate mileage.
How many hours is a Duramax good for?
GM has given the engine a 95% rating at 200,000 miles. This means that GM predicts that 95% of all engines will not reach 200,000 service hours based on durability and wear. If you want to know how long a Duramax engine will run, you should expect it to last as much as 300,000 miles before needing any major repairs. 19 thg 9, 2021
How much does it cost to rebuild a 5.0 MerCruiser?
From my research on the web, a 5.7Lt rebuilt replacement should cost under $3000 per engine, plus labor – 5.0Lt around $2200.. 4 thg 11, 2015
Is a 5.7 MerCruiser engine?
New 5.7L Complete Mercruiser Style Sterndrive EnPac Engine. … Products specifications. Displacement 350 C.I.D. (5736cc) / 5.7L Cylinders 90 Degree V-8 Cylinders Compression Ratio 9.4:1 11 hàng khác
How many hours will a 4.3 MerCruiser go?
The average life for raw water cooled engines is 1,000-1,500 hours or less depending on how often they are used and how well they have been maintained. Sitting unused is hard on them, it’s better if they are run and flushed often. 6 thg 2, 2017
How much does it cost to rebuild a 454 Mercruiser?
It usually costs between $2,500 and $4,000 plus parts and labor for an engine rebuild. 18 thg 2, 2022
How much does a Yanmar diesel engine cost?
The prices may range from $6 to $7. For the engine (Yanmar) and installation, you need to budget $5,000. … How Much Is A New Yanmar? Model Name Model Price in the USA Yanmar SA324 Garden Tractor $ 21,399 USD (approx) Yanmar SA424 Garden Tractor $ 24,321 USD (approx) 2 hàng khác • 16 thg 2, 2022
How much does it cost to get a boat motor rebuild?
Rebuilding your engine will cost around $2,500. That difference of $1,000 to $2,000 will buy a lot of gas, so consider carefully. The same-size engine in a newer four-stroke or DFI two-stroke model will add at least a $1,500 premium, so those 90 to 115 horsepower models could now run upward of $6,000. 30 thg 10, 2019
How much does it cost to install a motor on a boat?
How Much Does It Cost To Install A Motor On A Boat? For these individuals, the cost of an engine replacement is between $5,000 and $10,000 if you like something smaller or pay a good price for it. Depending on whether or not you want more power, and/or brand you like, up to $10,000 may be your going-up price. 10 thg 2, 2022
How much does a boat cost?
The average cost of a new boat is $60,000 to $75,000, but you could pay far less — or far more — depending on what you have in mind. But if you’re asking “How much does a boat cost?” you’ll factor in mooring fees and storage, fuel, insurance, licensing fees, maintenance and much more. 24 thg 5, 2021
Are Mercury 4-stroke outboards any good?
The Verados are top-of-the-line super-charged Mercury models, and this six-cylinder powerhead engine has a reputation as simply one of the best outboards you can buy. The 6 horsepower Mercury 4-stroke is one of the most popular smaller outboards in the world. 5 thg 8, 2021
How many HP is a Mercury 150?
Specifications – 150 HP / kW 150 / 110 CARB star rating 3 Bore and stroke 4.0 x 3.6″” / 102 x 92 mm Ignition SmartCraft ECM 70 Digital Inductive Fuel system Electronic Fuel Injection (EFI) 27 hàng khác
What is the best 150 hp outboard engine?
G2 Evinrude 150 E-TEC The best outboard motor with a horsepower of 150 can be deployed on a broad range of boats. The G2 is regulated by an external hydraulic, tiller, mechanical steering cable, and integrated power steering. 16 thg 1, 2022
Why do outboard motors cost so much?
The boat engine (outboard) is expensive because they need to withstand the marine environment well, so all the parts used in making one are expensive stuff. And they don’t sell numerous motors all the time, so to stay in business, they need to make a profit, so the price of an outboard (boat motor) is high.
How much does a new 150 hp outboard cost?
How Much Does A 150 Hp Outboard Cost? $15,305. Although there have been many legendary Yamaha four-stroke engines since the creation of the F150 in 1915, the F150 is one of the strongest, fastest and lightest four-stroke boats ever sold. No other pontoons or flats boat ever exceed the F150 for reliability. 15 thg 2, 2022
Does Yamaha make a 75 hp outboard?
With its advanced 16-valve, four-valve-per cylinder, Single Overhead Camshaft (SOHC) design and large 1.8 Litre displacement, the F75 delivers the ultimate combination of unbridled power and refined performance for the mid-range outboard market.
Will a little gas hurt a diesel engine?
As little as 1% gasoline contamination will lower the diesel flash point by 18 degrees C. This means the diesel fuel will prematurely ignite in the diesel engine, which can lead to engine damage. 11 thg 2, 2016
Are diesel engines more expensive to rebuild?
Diesel maintenance is cheaper overall, since diesel engines have fewer problems than gas engines; but diesels are more expensive when they need repairs. Diesel maintenance generally will not cost you more than for a gasoline powered version, depending upon the type of diesel car that you have.
How much does it cost to rebuild a diesel?
Average replacements of diesel engines cost between $5,500 and $11,000. A diesel engine rebuild will cost between $3,000 and $4,500, whether it’s a replacement or a rebuilt engine. 17 thg 2, 2022
Are rebuilt outboards reliable?
When finished, a rebuilt outboard engine can be reliable. The skill of the rebuilder and the quality of the components used will really determine the outcome. The quality of the original design and manufacturing will also influence the rebuilt engine reliability. 11 thg 7, 2020
How much does it cost to rebuild a 2 stroke outboard?
Rebuilding your engine will cost around $2,500. That difference of $1,000 to $2,000 will buy a lot of gas, so consider carefully. The same-size engine in a newer four-stroke or DFI two-stroke model will add at least a $1,500 premium, so those 90 to 115 horsepower models could now run upward of $6,000. 10 thg 5, 2020
How hard is it to replace an outboard motor?
As long as you have an engine hoist or a chain hoist and a place to hang it, and then get a lifting ring to mount on the motor, it is easy. Just be sure to get a lifting ring to bolt onto the top of the motor to be able to lift safely. 6 thg 10, 2013
Why is my lower unit oil milky?
That milky color and consistency is most likely due to water intrusion. It will not break down from use and get lighter, like other oils as it breaks down and gets used it darkens. Time to change seals and when you do your water pump do the whole kit and not just the impeller. 26 thg 2, 2019
Can you run an outboard motor without the lower unit?
You can run it as long as needed that way. I have run the outboard hooked up to the garden hose for a few seconds before without issues…just wondering if you can run it with the l/u off…. 10 thg 12, 2017
Should I leave my outboard motor up or down?
It’s best to tilt your outboard up when leaving your boat in the water to prevent marine growth from forming and from corrosion eating away at its metal parts.
Can you fill lower unit oil from top?
This. Adding from the top, with the bottom buttoned up so oil doesn’t drain right back out, creates an air pocket. It is a pain filling from the bottom though… Yep, if there isn’t oil in the LU, then there is air. 6 thg 10, 2012
What color should lower unit oil be?
What Color Should Lower Unit Gear Oil Be? Brand new gear oil should be a shade of blue, green, brown, or yellow, depending on the brand. Used gear oil should be a black/dark variation of the brand new color. Knowing what these colors mean and also the other colors you will encounter is important.
What is the quietest outboard motor?
Which Outboard Motor Is Quietest? Verado boats with 350hp and 400hp ntowing, the 350hp and 400hp Verado outboards the quietest in their horsepower category. Boat owners tend to associate powerful engines with powerful sound systems. 9 thg 3, 2022
Why are outboard motors so unreliable?
Many boat engines are “unreliable” because they are not taken care of correctly. While some boat engines are less reliable than others, there are common engine issues that appear from overuse, ill-maintenance, or low-quality materials. 6 thg 5, 2021
Who sells the most outboard motors in the world?
Yamaha is the global market leader with 40% market share and reported revenue of $2.6 Billion in Jan-Sep 2019 period, 4% up YOY.It has also said that sales of high margin 200hp outboard motors went up in US and well as Europe in 2019.
What is considered a high amount of hours on an outboard motor?
So what is considered high hours for an outboard motor? A two or four-stroke outboard engine should provide you with 1500hours of usage. It is deemed to be high hours for an outboard motor if used for 200 hours a year as that will mean the boat will last like seven to eight years.
Is 700 hours a lot for an outboard motor?
750 hours on a boat is not a lot. If the boat is used around 30-100 hours each year, a boat with 750-hours is a good pick because 30-100 hours each year imply the owner probably would have done annual maintenance; otherwise, the boat couldn’t get that long.
Which is better Mercury or Tohatsu?
When you get to the 25hp units, the Tohatsu is a superior unit. Tohatsu changed their 25hp to a 2.17 gear ratio, while Tohatsu did not let Mercury have the new ratio, Mercury is stuck with the old 1.92. The 1.92 is a slug compared to the new 2.17 ratio, not even in the same league. 9 thg 11, 2016
Are Mercury 2 Strokes good?
Mercury’s proven TwoStroke engines deliver easy starting, gutsy performance, and great all-round reliability. Across the range you’ll find an array of features that help keep your boating experiences more enjoyable and trouble-free.
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