wrote in message
ps.com...


Sounds like you've been reading David Pascoe's website. He places the
life expectancy of most diesel engines somewhere near 1,000 hours,
IIRC. We need to get the word out to thousands of people well beyond
1500 hours on their Yanmars that they are overdue for a major overhaul.
I do agree that these engines are unlikely to ever see the 5000 or 6000
hours often achieved with older, lower RPM engines like a Ford Lehman,
my original Perkins (that died only due to a manifold failure around
4000 hours), etc. But to predict they won't even survive as long as a
well maintained marinized automobile gas engine is far too negative,
IMO. Did you know that Yanmar scored better than Volvo, Perkins, and
some other top names in a survey of actual diesel engine owners in the
Jan 2006 issue of Cruising World?


I think (simply my opinion) that a modern diesel boat engine's lifespan is
inversely proportional to it's horsepower. I know a guy that's been through
3 engine rebuilds or replacements of both Yanmar 600 hp engines on his boat
in 6 years. He did a lot of fishing trips and never got much over 1000 hours
on any of them.

RCE