Originally Posted by BruceS
OK then with that much black smoke and extra power the high pressure pump has either been 'wound open' or wear has given it the same effect.
have "recommended" settings for a reason to give their engines the long life they deserve.
Any competent diesel mechanic
can "open up" an engine to give you far beyond the designed HP/Kw.
Perhaps your engine will last many many hours now it has the correct settings.
Maybe one size down in prop will give you added economy as well?
I don't want to change original pump or engine factory settings. All I am trying to find out is why the engine feels so sluggish and wont reach the rpm's it used too. There are many variables that make each propulsion
assembly unique. In my case with the Perkins 4108, Hurth transmission
and 18" propeller
( which by the way is 3 inches smaller than the original design for my boat) my boat would cruise
at 2400 rpm with a lot of reserve power in case I needed it. After 10 years of ownership
and knowing the previous owner who had it for twenty years I know something is not quite right.
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