THE FACT ABOUT MERCURY OUTBOARD LOWER UNIT LEAKING OIL THAT NO ONE IS SUGGESTING

Jun 30, 2012 #one There are tons of water-in-the-oil threads so I just considered I'd personally toss this available. Any water usually means a seal is leaking, and it can be as easy as an oil fill plug seal or as tricky for a prop shaft seal. The important thing is finding which of them are leaking. When I rebuild a lower unit, I test it for both