Insert nozzle of a tube of AMSOIL Synthetic Marine Gear Lubricant, Mercury's proprietary gear oil into the lower unit drain hole. Squeeze the lubricant up into into the lower unit, from the bottom of the tube. You may need more than one tube of gear oil.
Why change the gearcase lubricant in a Mercury fourstroke?
Changing the gearcase lubricant in your 75hp and higher Mercury® FourStroke outboard* is routine preventive maintenance that will help keep your engine performing at its peak. Gear lube protects vital components within the gearcase, or lower unit, from corrosion and wear.
How do I change the lube on my Boat?
Remove the top oil vent plug. Let the unit completely drain. If your drive has an internal drive lube monitor bottle in the boat, remove the bottle from its bracket and pour out the old lube. Look in the bottom of the bottle. If you see residue in the bottom of the bottle it should be removed and rinsed out with carb cleaner or Power Tune.
What kind of gear Lube do you use on a Mercury outboard?
Community Answer Mercury Premium SAE 80W90 Gear Lube is recommended for lower units for outboards below 75 horsepower. It should not be mixed with Mercury High-Performance SAE 90 Gear Lube.
How do I maintain my MerCruiser sterndrive?
Properly maintain your Mercruiser sterndrive. Change the lube every year or sooner if you suspect a problem.
What to look for in gear lube?
How to clean a boat drive lube bottle?
What is Mercury Premium SAE 80W90?
How to lubricate a drive?
How to get old gaskets out of drain plug?
What is a small plastic lube pump?
How to flush a drive?
See 4 more
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How do you change the gear oil on a Mercury outboard?
0:074:09How To Change The Lower Unit Gear Oil In An Outboard Motor - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou're going to need a container to catch the old oil. You're also going to need a flat screwdriver.MoreYou're going to need a container to catch the old oil. You're also going to need a flat screwdriver. And the oil to go in the lower end unit. So I'm going to start by removing the screw at the bottom.
How do you change outboard gear lube?
2:144:12Changing Your Lower Unit Oil - YouTubeYouTubeStart of suggested clipEnd of suggested clipUsually located above the cavitation plate on the starboard side of the lower unit. And the oil willMoreUsually located above the cavitation plate on the starboard side of the lower unit. And the oil will flow rapidly out of the drain hole. Give the oil plenty of time to drain completely ideally.
How often should you change gear oil in outboard?
If you're planning on changing the oil on your fishing boat's outboard motor this year you should really consider changing your gear lube while you're at it. Just like oil, gear lube should be changed every 100 hours of use or at least once a year.
What kind of oil does a Mercury outboard lower unit take?
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.
How do you check the gear oil on an outboard motor?
Lower Units Used as Inboard/Outboard Drives Wipe the oil from the dipstick with a clean, lint-free rag and screw it back into the oil filler. Unscrew the dipstick from the oil filler and note the gear oil level. The oil level should be at or near the center of the dipstick, and above the lower mark on the dipstick.
How much oil does a Mercury lower unit take?
STEPLower Unit Oil Needed by ModelModelApproximate Fluid Ounces Required9.8 (2-stroke & 4-stroke)10.8 fl oz9.9 (2-stroke)12.5 fl oz9.9A (4-stroke)6.8 fl oz35 more rows
Should you run outboard before changing oil?
Before changing, run your engine for a few minutes. This will lower the oil's viscosity and suspend the contaminants.
How often should I start my boat?
How often should I run my boat motor? Your boat motor should be run on a regular basis. Running the boat engine every so often even when you don't use your boat often helps keep things in working order.
How long can boat oil sit?
You should typically change your boat oil every 50 to 100 hours on the water, which is about every two to four days, or at least once a year. However, if you're operating a boat that's sporting a new engine, Boat US recommends changing your boat oil every 20 hours for the first 100 hours of use.
How often should you change lower unit oil in Mercury outboard?
Much like how cars should receive an oil change every thirty-thousand miles, your outboard lower unit oil requires changing every one-hundred hours the boat is in operating.
Can I use regular gear oil in my lower unit?
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.
Should I use synthetic oil in my Mercury outboard?
It is recommended for most Mercury Racing four-stroke engines and Verado outboards offered before the 2007 model year. Synthetic Blend 4-Stroke (10W-30) Outboard Oil is designed to meet the needs of all four-stroke outboard motors, with industry-leading corrosion protection.
How often should you change lower unit oil?
every one-hundred hoursMuch like how cars should receive an oil change every thirty-thousand miles, your outboard lower unit oil requires changing every one-hundred hours the boat is in operating. Without regular lower unit oil changes, you run the risk of damage occurring in the engine.
Is gear oil the same as gear lube?
Well, yes, they are all gear lubricants, but no, you can't just use them interchangeably. Axles, differentials, final drives and other gear sets used in mobile equipment applications all require specific lubricants designed for the heavy loads and the sliding and rolling forces associated with the operation of gears.
Should you change lower unit oil every year?
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.
How do I change the oil in my outdrive?
1:323:11Changing Lower Unit or Sterndrive Oil On A Boat | BoatUS - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you have to pump lube from the bottom until it comes out of the top vent. Screw. If you hold aMoreSo you have to pump lube from the bottom until it comes out of the top vent. Screw. If you hold a rag underneath it you can catch spills before they get worse.
WHAT TYPE OF OIL GOES IN MERCRUSIER DRIVE LUBE RESEVOIR - JustAnswer
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Mercruiser 3.0L Drive lube refill - iboats Boating Forums
Re: Mercruiser 3.0L Drive lube refill All good points by the guys but! there has to be a witness of lube somewhere bilge, water, ? As stated drain it and remove the drive then pressure and vacum test ther after to find the source of the leak use soapy water in a sray bottle while under pressure to ffind bubbles and the will lead you to possible problematic area.
what is the drive lube in a 4.3l inboard mercruiser and is… - JustAnswer
What is the "drive lube" in a 4.3l inboard mercruiser and is filling the "visual" reservoir sufficient? - Answered by a verified Marine Mechanic
What to wear when changing gear lube on outboard?
The job of changing the gear lube in your outboard has minimal safety risks. However, it’s recommended to wear protective gloves and eyewear and to use the emergency stop switch to disable the engine while you work.
How to clean a lubricant tube?
Remove the lubricant tube. Then reinstall the fill/drain plug and its sealing washer and wipe up any residual lubricant.
How to remove propeller nut?
Use the Floating Prop Block and ratchet wrench to loosen and remove the propeller nut. Then remove the remaining propeller and hub components. If needed, consult your engine owner’s manual for the proper steps to complete this procedure.
Where to place oil catch pan on outboard?
Place the oil catch pan below the outboard.
Can you drain gearcase lubricant?
When draining the gearcase, always inspect the used gear lube for the presence of water. If water is present, it can settle to the bottom and will drain out prior to the lubricant. It can also be mixed with the lubricant, giving it a milky appearance. Water in the lubricant could result in premature bearing failure or, in freezing temperatures, can turn to ice and damage the gearcase.
What to look for in gear lube?
Inspect the gear lube for evidence of metal particles or water intrusion.
How to clean a boat drive lube bottle?
If your drive has an internal drive lube monitor bottle in the boat, remove the bottle from its bracket and pour out the old lube. Look in the bottom of the bottle. If you see residue in the bottom of the bottle it should be removed and rinsed out with carb cleaner or Power Tune. Make sure the bottle is clean and dry.
What is Mercury Premium SAE 80W90?
Mercury Premium SAE 80W90 Gear Lube is recommended for lower units for outboards below 75 horsepower. It should not be mixed with Mercury High-Performance SAE 90 Gear Lube.
How to lubricate a drive?
If your drive has an internal drive lube monitor bottle, add lube to the bottle up to the "full" line. Be aware that the drive might have an air bubble and that the system might "burp" after being run. This could result in a drop of the oil level in the bottle. Just top off the bottle with clean lube and keep an eye on it. Be sure to loosen the bottle cap to avoid creating pressure in the system. Pressure in the system will make a mess when the hand pump fitting is removed from the bottom fill hole.
How to get old gaskets out of drain plug?
Look closely in the hole and use the pick to make sure all of the old gaskets have been removed. Buy new drain plug gaskets and place them over the cleaned-up plugs. ...
What is a small plastic lube pump?
A small plastic lube fill pump to fill from the bottom hole.
How to flush a drive?
To flush the drive fill the drive from the BOTTOM hole with enough lube to fill the drive and then let it drain out fully. Do NOT reuse the flushing lube. Use a sharp pointy pick and make sure to remove the old drain plug gaskets from the drain and vent holes. Never reuse an old drain plug gasket.