MERCURY OUTBOARDS HISTORY - AN OVERVIEW

Jun 30, 2012 #one There are a lot of water-in-the-oil threads so I just believed I might toss this in existence. Any water usually means a seal is leaking, and it might be as simple as an oil fill plug seal or as tricky as being a prop shaft seal. The real key is discovering which ones are leaking. Once i rebuild a lower unit, I test it for both of