I have the same engine... for 28 yrs and it runs well. It does seem to have a rpm
issue until it warms up... tends to creep up in revs as it warms up.. which is not an issue if one is motoring such as leaving the dock
of anchorage as YOU control rpms based on need of propulsion
. Mine kicks out a bit of smoke on cold start and that disappears as it warms up to no smoke. I think that normal.
I've also found that once up to operating temps its idle is very low... perhaps 800 and a bit rough and so I tend to idle it a bit higher in neutral. The tach is hardly accurate or precise.
I don't know much about diesels but this one seems to have a pretty simple system re supplying fuel
ergo determining rpms.... no electronic feedbacks, for example. I just assumed the mechanical connections ... teleflex, levers, springs and so forth seem to have their own comfortable places. I can't comprehend how the rpms would rise a lot without some mechanical setting moving on their own.
This seems to be where it happens! Not much there there.
What do I know?
is an anoyance... Ain't it? If you don't have set up a blower to draw air out of the engine compartment to overboard
. The engine room should not be completely sealed and so cooler air is drawn in... for combustion as well.
Use lead faced foam sheets
on the walls. Helps a bit. But it does get hot in there and diesels like to be hot. Watch your temp gauge. You don't want to let it get too hot from clogged cooling
hoses, pipes or a busted impellor.