Join Date: Oct 2008
Location: Cape Canaveral, FL
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Rep Power: 7
You didn't mention how long you've had the boat or what kind of maintenance the engine has had, or when it was done.
First the throttle delay is normal for any diesel. It's written in my Yanmar manuals, and I would assume your diesel would be similar. Marine Diesels don't have a conventional throttle like a gas engine, they mechanically move the governor (rev limiter) instead.
As for the symptoms, I suggest checking the old standbys before spending money:
1.) clogged fuel tank pickup (disconnect the fuel line and blow into the tank)
2.) barnacles on propeller and shaft
3.) air in the fuel system (bleed the system)
4.) clogged fuel filters
5.) old diesel fuel (new low sulfur fuel needs a stabilizer additive) (toss in a few gallons of new fuel)
6.) exhaust elbow clogged
7.) adjust valves (usually a 30 minute job)
8.) air in fuel return line
My apologies if you've already done this check list. My money would be on a clogged fuel tank pickup. Common with old fuel tanks
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Last edited by TropicCat; 06-14-2011 at 10:02 PM.