how much does it cost to replace a lower unit on a boat - An Overview
Jun 30, 2012 #1 There are plenty of water-in-the-oil threads so I just considered I'd throw this out there. Any water indicates a seal is leaking, and it might be as simple as an oil fill plug seal or as really hard as being a prop shaft seal. The crucial element is acquiring which of them are leaking. Once i rebuild a lower unit, I test it for equ