What Oil Goes in an Outboard Lower Unit

10W-30 Mineral Base conventionalthis is a universal oil ideal for almost all types of environments. What kind is best and a link w proper procedures would be great.

Star Brite Hypoid 90w Lower Unit Gear Lube 32 Ounce Recommended For Use In Mercury Mercruiser Johnson Evinrude Omc Grease Lubricant Car Oil Change Lube

Its internal mechanical workings put tremendous pressure on the lubricant insideThis hardworking device just needs some simple regular maintenance to help it.

. Next step is pushing the driveshaft upward into the motors middle part to reach the crankshaft. This will release the vacuum that exists and allow the oil to drain freely from the lower unit. In regards to never hearing a lower unit blowing up because of oil I agree to some extent.

This step by step guide will provide you with the tool and tips. To keep the lubricating oil within the gearbox and to prevent water from entering the gearcase there are a number of oil seals and O-rings in the lower unit. 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.

The oil that comes out as you drain the lower unit can tell you a lot about whats going on inside the gearcase. STAR BRITE PRO-Star Super Premium 80W-90 Lower Unit Gear Lube - Synthetic Blend - for All Outboard Stern Drives Requiring 80W90 Gear Oil. I mentioned the synthetic Merc stuff only as an better possibly option.

Let all of the oil drain completely from the lower unit. Shift oil seal and shift shaft plate O-ring Driveshaft oil seal Gearbox bearing housing O-rings Prop shaft oil seal The prop shaft oil seal remains exposed making it more susceptible to damage. I would also like to change the lower unit oil.

Once all the oil has been completely drained the lower unit will have to be re-filled. Gearbox bearing housing O-rings. It is a 1991 johnson 70 oil injected of course.

Dealers sell a pump with a hose that screws into the lower drain hole and pump new oil in till it flows out of the upper hole. However the more you take your boat onto the water the more work the engine goes through which can increase the need for oil changes. Slippery Pete Lower Unit Gear Oil Pump for Standard Quart Bottles Includes 38 inch Metal Swivel 8mm and 10mm.

Brand new gear oil should be a shade of blue green brown or yellow depending on the brand. Milky lower unit oil means you have water in the oil which means youve lost a seal somewhere. This will take about 5-10 minutes.

Knowing what these colors mean and. In this video I give a step by step guide for an oil change in the lower unit of your boat. The first place to look is the output seals which are found behind the propeller.

This is how to change the lower unit gear oil in an Evinrude or Johnson outboard. Next fall drain the lower unit to remove any water for possible freeze damage and refill it for next season. Drain the Oil.

Get a few tubes of lower unitgear lube from a marine supply dealer and a device to squirt it in. ASTM Timken load tests show that Royal Purple Max-Gear has a far stronger film strength than both synthetic and mineral oils. Once all the oil has completely drained out it is time to refill the lower unit.

Used gear oil should be a blackdark variation of the brand new color. Now to insert the speedometer through the hole lower the driveshaft a little bit. There are several types of apparatuses available.

Synthetic Blend 25W-40. It works anywhere regular oil can be used as well. Shift shaft oil seal.

I removed the lower unit from the outboard and brought it to the local mechanic who with some difficulty went and changed the prop seal. Without it you go nowhere. Following are different types of lower unit oils.

The lower unit converts the power of your outboards engine to rotation of the prop shaft which moves the propeller which moves your boat. This will release the vacuum that exists and allow the oil to drain freely from the Mercury lower unit. Prop shaft oil seal.

What Color Should Lower Unit Gear Oil Be. Looking at the prop seal I could see the milky fluid present so I surmised that the prop seal was bad. Pump it full of new oil.

- For Outboard lower units below 75hp. Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser Sterndrives 32 oz. Some of the seals on your outboards lower unit include.

The oil can handle some water for a while. Without regular lower unit oil. Remove the screws at.

5W-30 Full-Syntheticthis is the best oil for high performing outboards. Next the mechanic pulled the waterpump off the lower unit to look at the upper seal. Shift shaft plate O-ring.

Now remove the top drain plug. This process can easily take between 5-10 minutes. Be very careful during pushing the driveshaft and make sure crankshaft and driveshaft are in a realign position.

10 lower unit oil for mercury outboard Review. 2-Stroke Outboard Oil Recommendations Gearcase Capacities Force 27 Johnson Evinrude 27 Mercury Mariner 36 Nissan Tohatsu 39 Suzuki 40 Yamaha 42. Allow all of the oil to drain completely from the lower unit.

STAR BRITE PRO-Star Super Premium 80W-90 Lower Unit Gear Lube - Synthetic Blend - for All Outboard Stern Drives Requiring 80W90 Gear Oil 525 37 54 4399 Save more with Subscribe Save Get it as soon as Wed Apr 13 FREE Shipping by Amazon. Then push the gearcase up to embed a bolt finger. 20W-40 Mineral Base conventionalfor the larger outboards and warm climate this is best.

Sent from my iPhone using Lake Ontario United. Outboard lower units develop tremendous heat in their spiral-bevel gears and need a high film strength gear oil to lubricate metal-to-metal contact and prevent damaging wear. Just bought the boat so I would like to change both.

In other words just use a good quality 90wt oil for your particular lower unit is GL-5 the classification. You dont put motor oil in a lower unit. We havent checked or changed the lower unit gear oil in this outboard sinc.

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