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Forum: Engines and Propulsion Systems 27-11-2011, 09:19
Replies: 22
Views: 18,633
Posted By DotDun
Re: Yanmar Saildrive Seal Leaking . . . Again

It certainly sounds like the expansion tank tube is blocked. Can you take it off of the tank and blow thru it with the filler cap off?

You can take the top cover (#11) off and see what's going...
Forum: Engines and Propulsion Systems 24-11-2011, 15:38
Replies: 22
Views: 18,633
Posted By DotDun
Re: Yanmar Saildrive Seal Leaking ... again

First, this begs the question, the oil is clean and not milky, correct? (milky = water)

Second, you are using the correct oil, 80-90W - see attached.

Third, can you 'redline' the engine in...
Forum: Engines and Propulsion Systems 23-11-2011, 14:34
Replies: 22
Views: 18,633
Posted By DotDun
Re: Yanmar Saildrive Seal Leaking ... again

If you are keep taking out these lip seals, there is an issue causing it, they should last 1000s of hours. Mine are 8 years old, 1800 hours, no leaks.

I have never understood putting the...
Forum: Engines and Propulsion Systems 23-11-2011, 13:26
Replies: 22
Views: 18,633
Posted By DotDun
Re: Yanmar Saildrive Seal Leaking ... again

The seal that keeps oil from leaking into the bell housing is a lip seal on the pinion shaft. It's far from 10" in diameter, did you mean 1" ??? :confused:
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