The gearcase assembly on an outboard engine is sealed, and draining is not needed. If however, the gear lube has not been changed in a while, during the water pump replacement is generally a good time to do so.
where is the drain oil plug on a 2010 9.9 mercury outboard motor
The only thing you need to do is put the motor in the verticle position when you take it out of the water. The water will drain out. Yes, even the water that is in the "water pump" will drain. DON'T DRAG YOUR LOWER UNIT ON THE GROUND.
how do u remove the lower uint on an outboard motor? Depends on the outboard. Some Johnson/Evinrudes required that the powerhead (engine) be removed first for example. Look for a service manual for your particular motor on ebay, and it will tell you all you need to know to avoid problems.
The lower cowl on a vintage 1973 Mercury 9.8HP outboard motor with 4 retaining bolts. They are passed through the cowl and directly into the body of the boat.
There are two fill/drain plugs located on the right hand site of the lower case. Remove them and drain the lubricant. Once emptied force the new lube into the case using the lower port. When it starts to come out the top it is full and you can reinstall the drain plugs. Always fill from the bottom port or air pockets will get trapped in the case.
Depends where the water (ie coolant) intake is
How do I remove the lower unit from my 1984 50 hp. Mercury outboard motor?
it is on the rear of the engine below the engine. There is a rubber hose coming out of the motor and the drain plug is inside the rubber hose.
No
I use 80 weight gear oil.
Yes. For example, you can have an outboard motor on a boat.
the motor is a 1967 outboard