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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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  #11  
Old 01-04-2010
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I have a Westerbeake, runs great, but my parts dealer is often shocked at the cost of the replacement parts. I hear this often around my yard.

Never had a Yanmar, but hear they are very quite reliable and factory parts are priced more reasonably.
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  #12  
Old 01-04-2010
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Quote:
Originally Posted by JohnRPollard View Post
Hi, thanks for that good info.

Do you know whether Yanmar corrected the heat exchanger problem on all new sales/installations of 3YMs going forward, or are they only addressing it if a problem develops? In other words, do they still sell the new engine with this smaller exchanger/impeller combo?

Engines with serial numbers below E05566 have the smaller heat exchanger. After that production changed to the larger exchanger sometime in 2005/06.

I went through this problem 3 years ago, as did many others, but it has since been fixed by Yanmar under warranty.

Yanmar 3YM30 Overheating
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Originally Posted by theartfuldodger View Post
Make sure you get the motor mounts for the 3Ym30, very important. I installed new 3ym30 in winter of 2004-5, and have 745 hours on her, only problem I had was over heatung issue which had sea weed blocking the inlet of the heat exchanger. And yes had a strainer, but now I have two of them. The weight of our boat is 20,000lbs, being a deisel mechanic I'm happy and impressed with the engine.


What's the serial number, you might want to read my post at Hunterowners.
The overheating issue was not limited to installs in new Hunters as I found many other makes of boats with the issues, including a couple of repowers.
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Old 01-04-2010
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Quote:
Originally Posted by scottbr View Post
Engines with serial numbers below E05566 have the smaller heat exchanger. After that production changed to the larger exchanger sometime in 2005/06.

I went through this problem 3 years ago, as did many others, but it has since been fixed by Yanmar under warranty.

Yanmar 3YM30 Overheating
Wow. Sounds like that problem was fairly widespread. It's too bad Yanmar didn't broadcast the recall and fix all the problem engines, rather than taking the silent recall route.

Thanks for that info.
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They issued two Marine Service Advisories, that first cleaned the heat exchangers then replaced for the larger bundle, but only for those that experienced problems. There are probably quite a few boats out there that motor out of there marina a short distance then hoist the sails, without much if any long distance motoring and may not have the overheating problem until a crucial time when the motor is needed. Hopefully the surveyors have the info as well, to catch these on re-sales.
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I would have to disagree with the statement made above in this thread:

"The installation should be done by a qualified, certified & experienced professional"

Anyone who is reasonably handy can swap out a diesel in a boat given they do their research and take some care. Mechanics have their place but the average boat owner can save themselves some serious money by doing the engine swap themselves. This type of work doesn't require any specialized knowledge especially when you consider the size of the engine and the fact it is going into a displacement hull.

I wouldn't suggest just anyone tear into their engine and attempt a rebuild without some previous experience but an engine swap ...sure why not.
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