Re: 1971 mercury 200 20hp gearcase leak

[billw]

In theory, the oil should come out of the oil vent screw hole before it gets up to the water pump base, so I hope your gear housing is not cracked from freeze damage. Are you sure it’s coming out of the water intake or the drain hole that’s just in front of the intake? I guess that, if the drive shaft seal (and probably the drive shaft surface) are bad, and you really power the oil in, it could come out the intake, that way. I’d pull the gear case off, remove the water pump and pump base, and have a look. Something definitely needs attention before the motor is put on a boat, that’s for sure.

Long live American manufacturing!