I changed my lower unit oil and tilted my drive in the UP position. I came out this morning and there was some oil in the driveway, and upon closer inspection, it was leaking out of the "upper unit" screw labelled "oil vent" that you use to fill it up. To my reccollection this has never happened.... or ive never noticed it.
It is a screw, so im not sure if stuff is supposed to come out, even if it does say vent. Could this cause water to get into the drive oil? It is above water, but obviously waves wash over it.
Mercruiser 120 mated with a Alpha One lower unit.
Pic of the Vent screw
http://www.boatingwithtr.com/Members/images/OilVentScrew.gif
It is a screw, so im not sure if stuff is supposed to come out, even if it does say vent. Could this cause water to get into the drive oil? It is above water, but obviously waves wash over it.
Mercruiser 120 mated with a Alpha One lower unit.
Pic of the Vent screw
http://www.boatingwithtr.com/Members/images/OilVentScrew.gif