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Old 03-01-2013, 12:22 PM   #21
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Originally Posted by FF View Post
So a more frequent oil and filter change (at least Double) will be a big help.

Have never heard "You killed that engine with too fresh , too clean oil."
I'm guilty of changing the oil too often, however, I believe it's the "kindness & cheapest" thing I can do for the Cummins.
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Old 03-01-2013, 03:14 PM   #22
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Or as some experts say, "Have never heard of killing and engine that runs lightly loaded most of the time."

Such as all the old high hour Lehmans, Cats, Cummins or Perkins that are well represented on TF
That's because no one seems to think about the fact that propulsion engines don't suffer the same indignities from low load operations that generator engines do. Everyone likes to talk about low loading issues but then they post links or quotes from articles that describe a generator application.

A generator runs at full rated speed regardless of the load, that is the difference. A properly propped propulsion engine operates (more or less) proportional to load, low rpm, low load, high rpm, high load. The engine is generally quite happy to live like that. It is only the owners who freak out.
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Old 03-01-2013, 07:58 PM   #23
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I think the first question that I would be asking is if the boat is a "full displacement" hull or a "planing" hull.
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Old 03-02-2013, 09:03 AM   #24
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I think the first question that I would be asking is if the boat is a "full displacement" hull or a "planing" hull.
I was wondering this myself. I have only single 5.9 and can't figure out why you would need two of them unless you plan to plane.

Dave
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