In article , Engineman1 wrote:

A friend is thinking of buying a yacht with twin diesel engines. He doesn't
trust the people who inspect boats because he believes they are in cahoots with
the yatch brokers. He asked me if I'd take a look at the engines in the boat he
made an offer on. Are there some things I can check on without taking a lot of
time and using expensive equipment? He suggested checking the exhaust for smoke
but since diesels burn oil anyway I wouldn't expect to tell much from that. Oil
analysis is out because the owner just changed it.

If it were me buying it then I'd want to do a compression test.

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Mike Graham | Metalworker, rustic, part-time zealot.
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http://www.metalmangler.com| Caledon, Ontario, Canada