change gear oil mercruiser alpha one

[spareparts]

take both screw plugs out, remove the top of the resevoir. Fill from the bottom plug, you'll have to get a pump when you pick up the gear lube, don't worry, its cheap. You fill from the lower drain hole till it comes out of the upper vent hole, then put that vent screw back in and fill till you have the level in the reservoir. If it doesn't want to fill the reservoir after you got it to the vent, you can just top off the reservoir, you will need to add some more after you run it. Biggest thing is to fill the drive from the lower drain hole, that keeps it from trapping air in the drive. You only have to be 6 or 7 ounces down to wipe out teh upper unit, that's why they added the resevoir