SailNet Community - View Single Post - How to destroy a diesel in one easy step...
View Single Post
post #21 of Old 03-15-2012
Irrationally Exuberant
Join Date: Jul 2007
Location: Northern Virginia
Posts: 1,383
Thanks: 11
Thanked 8 Times in 8 Posts
Rep Power: 10
Re: How to destroy a diesel in one easy step...

Originally Posted by Sailingking22 View Post
I should have read this forum before sailing but luckily none of that happened to me. I hear everyone and I mean everyone who sails saying change your impeller. I changed mine and the new one I took it apart again and but the old one back in. Works like a charm. Plus, they work fine even with tabs broken so I don't see the huge emphasis here. When the engine overheats....change it. I don't have a temp sensor on my YSM 12 but it shuts off automatically when it gets too hot. This is usually, when I leave the seacock closed or the mixing elbow on the exhaust gets clogged/blocked which seems to happen about every 24 hrs of run time. I hear everyone praising the Yanmar engines but I've never had more trouble with an engine. The one thing I would praise is I've been able to fix everything....pretty easy to work on. Well almost....currently I'm mounting a little 8 hp evinrude to the transom...not sure whats wrong with the Yanmar now. Won't spin. Probably water in the chamber which .... rebuild or replace with something better. It's on a Hunter 30 and only ran 4.5 knots. I'd love to get something that'll get me 6.0 knots.
I guess you're not kidding here. Running your engine until it cuts out from overheat and using that as your impeller wear indicator is just a bad idea. Probably not good for the engine, but also, this event might just happen at the worst possible time--when you really need your engine. There are lots of sailboat parts that give nice obvious indicators when they've failed, but best not to go there.

Tom K

2000 Beneteau 331
Northern Chesapeake Bay

Ambition is a poor excuse for not having enough sense to be lazy ~ Steven Wright
arf145 is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome