What check on diesel that's been sitting for 2-3 years. - Page 2 - SailNet Community
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post #11 of 14 Old 07-01-2013
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Re: What check on diesel that's been sitting for 2-3 years.

Hello,

My second boat had been on the hard for over a year before I bought her. I knew very little about diesels at the time. The broker (who was excellent) told me the engine was in good operating condition, and that it would start and run properly, and that a survey would prove this. He said that it was HIS responsibility to get the engine running correctly.

Anyway, we agreed on a price, pending survey of course, and the yard dropped the boat in the water and worked on getting the engine going. It took a while as there were a number of 'issues' (the engine water intake was clogged with mud from insects, the batteries were flat, etc.) but eventually the engine fired up and ran. After about 10 minutes it purred right along and the surveyor gave the engine (and the rest of the boat) the thumbs up.

I had that boat for 3 years and the engine ran flawlessly for the entire time.

Barry

Barry Lenoble
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY

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post #12 of 14 Old 07-01-2013
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Re: What check on diesel that's been sitting for 2-3 years.

How old is the engine over all? Does the owner have maintenance records for it? If there's a damping plate, has it been replaced?

- Jim
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post #13 of 14 Old 07-02-2013 Thread Starter
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Re: What check on diesel that's been sitting for 2-3 years.

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How old is the engine over all? Does the owner have maintenance records for it? If there's a damping plate, has it been replaced?
The engine is a 1987. I have not seen any records yet and I'm not sure about a damping plate (what is it?).

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post #14 of 14 Old 07-02-2013
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Re: What check on diesel that's been sitting for 2-3 years.

A damping plate is actually two pieces of metal held together with springs. They look something like this:
GM Chevrolet 454 7 4L Marine Drive Plate Damper 26 Spline Gas Boat Big Block | eBay

The damping plate connects the flywheel to the transmission. As I understand it, as the starter kicks the flywheel over (big, hard shove/jolt), the springs in the damping plate help deaden some of the initial jolt so power is more smoothly/evenly transmitted to the transmission. Mine died on my new-to-me 1980 engine on the 3rd day we owned her (she was being moved by a professional captain). I don't believe it had ever been replaced, and eventually the springs give way out of fatigue. Our damping plate failed back at the end of March. We're still waiting for the repairs to be finished, and the bill is going to be several thousand dollars (we're getting a new transmission, too).

As I understand it, not all diesels have damping plates. They seem like a good idea, but they are yet another part that can fail.

- Jim
Home: Western Philly 'burbs
1980 Allmand 31
1975 Albacore 15


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