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Old 21-09-2010, 22:58   #16
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Originally Posted by Ex-Calif View Post
I don't know the Perkins block. Are the cylinders sleeved? Or are you saying that even with the water damage the cylinders can be oversized?

In my opinion this is about the machine work. The good news is it's all free until you have to decide. Get it apart and evaluate the block, crank and head.

Get the head zyglowed for cracks and then measured. Evaluate the valve seats etc.

get the block measured to make sure it's true and straight or can be made so. Evaluate the cooling jacket and whether the cylinders can be oversized.

Get the crank maganfluxed and measured.

At this point you have your labor and maybe a couple of hundred in machine shop costs.

If anything is an issue, go with the Yanmar. Otherwise keep what you got.

Even with the higher than predicted parts bill you are still coming up a couple of thousand cheaper. Don't forget the externals - engine panel, engine controls, wiring, etc, etc, etc that go with the repower.
Now there is a good point you are going to do something so do the parts you have to until the other pieces come together. Unless time is an issue. Then all bets are off.

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Old 19-12-2012, 22:56   #17
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Boat: 1968 Sparkman and Stephens. '1 ton' 36 ft, Kauri
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Re: Which Engine Would You Use ?

Perkins rebuild or New Yanmar? What was the end result? Cheers, John.

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