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From: (no name) (no email)
Date: Tue Sep 02 2003 - 06:32:38 EDT
Just sitting is far worse for an engine than constant or occasional use.
DD has procedure for preserving any engine that is out of service for
over 30 days.
And I would guess most other engine mfg have similar cautions.
This is both a complex and detailed procedure ,
and in 40 years of boating I only know of one or two folks knowledgeable
enough to bother.
So purchase a boat that has commercial grade engines ,
rather than truck or lorry engines installed.
ALL engines need rebuilding or replacing eventually.
You will be able to purchase a factory style shop rebuild when the time
comes at a competitive commercial price.
If you use a brand with years of the same design , you won't get the Jap
problem of endless parts changes every week , Or the Volvo problem of 20X
normal prices for everything, (including advice!),
Stick with a boat with Detroits , Cat ,Cummins , or one of the commercial
brands of Euro diesels if your in Euro wimp land.
A copy of "Boats & Harbors" would be great , so you can find competitive
commercial re builders, "Rock & Dirt " (published by same folks ) for the
construction industry will also work.
IN A new boat , try to obtain the engine "Fuel Map" from the engine mfg ,
and read how low RPM can be used for long term power.
ITS 1000 times easier to silence a 1200rpm engine than a 2400rpm engine ,
if you travel .
A QUICK way to evaluate a diesel is to look at the exhaust on COLD
(ambient temp , not run for 24 hours)start.
A bit of white smoke is normal , more depending on how cold it is
outside.
The smoke should clear up in a min or so.
IF it takes the engine till a circ water temp of 140 or so to stop
smoking the compression is probably low.
On a commercial engine this could still equal a few thousand hours before
rebuild.
Then look at the exhaust under load, black smoke at speed is an
overloaded engine , and rebuild time will be sooner rather than later.
Good Hunting,
FAST FRED
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