Lower Unit Lube Leak

[Brew2]

2004 Alpha I Gen II

Had a lower unit lube leak last boating season (had to refill the resevoir several times over a couple months).

Removed the unit, built pressure tester, and tried it last night....held 10 psi overnight.

Bought a vacuum (brake fluid) tool today and will try to adapt that to my tester tonight to check with vacuum.

Question is....if the vacuum holds, where do I look for the leak?

Anything else a fella should be checking??

Thanks in advance.

Brew

 

[Don S]

Re: Lower Unit Lube Leak

Did you drain the gear lube before you did the pressure check?

 

[Brew2]

Re: Lower Unit Lube Leak

You bet....lower unit was empty when tested.

 

[pvmtsux]

Re: Lower Unit Lube Leak

The quad ring on the top of the starbord side of the lower unit.
http://forums.iboats.com/showthread.php?t=381201&page=1

 

[Brew2]

Re: Lower Unit Lube Leak

Thought of that, but if the quad ring were the problem, shouldn't that have resulted in the pressure test failing?

Noticed in my first post that I referenced removing the "lower unit"....I actually removed the outdrive (upper & lower units)...sorry if that caused any confusion.

 

[Don S]

Re: Lower Unit Lube Leak

You might want to look at the hose that goes from the bellhousing to the gimbal housing thru hull fitting. That fitting is plastic and has a bad habit of breaking.

 

[Brew2]

Re: Lower Unit Lube Leak

Makes sense....thanks Don.

I'll have a look at that....assuming the snow isn't too deep at the rear of boat! Melting fast though...boating season almost here!!

Brew