3.0 lower unit oil leak

br0ke

Recruit
Joined
Sep 10, 2010
Messages
1
I have loitered here for nearly a year but this is my first post.

We only just got our boat last year and had no issues with it. When I pulled it out in November I had it serviced by a boat mechanic. It has been sat on the drive all winter and I was cleaning it at the weekend and noticed that when I moved the leg up and down, green oil leaked out. There was no oil until I did this
My initial thought was that it was slightly overfull and not a problem, but I searched this forum and have came to the conclusion that the lower unit should hold pressure and therefore not leak oil.

It's a 2000 Fletcher19 with a 3.0L OMC engine and a Alpha1 Gen2 sterndrive.

Should I be concerned, or is this normal after a service?
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: 3.0 lower unit oil leak

You may have an outdrive leak, best to remove the drive, drain the gear lube. then pressure check the drive with 15 psi of air, and spray soapy water on everything to find the leak. It will bubble. If leaking bad enough, you will probably hear it.

Note: Being as you have a 2000 boat, someone somewhere, sometime, replaced the engine with an older OMC engine. OMC went out of business in 98, and never did make engines for Mercruiser.
 
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