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post #1 of Old 11-15-2012 Thread Starter
Richard Donovan
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Angry engine change out

Hello. I'm new to sailnet and have a project to share. I'm going to replace my old yanmar 3qm30 (32 years old) with a new yanmar 3ym30 in my 1979 C&C 36. Anybody out there done it or similar and have wisdom for me? I began trying to fix my old motor when it suddenly wouldn't crank after I replaced the motor mounts due to excessive vibration only in forward gear. Also ran rydlyme throuogh engine for 3 hours with a transfer pump. Mechanic says exhaust was plugged and raw water has been getting in cylinders for some time. After exhaust manifold was remachined for almost what a new one would cost, I got news that complete valve job would be next to the tune of another $1400. Then we'd be able to see if cylinders would make enough compression to get me by for a while. I pulled the plug and said enough. Thanks for any help.
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