Loss of power / won't reach WOT

Vikingstaff

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Awesome News. :cool:

Albeit the repair is not cheap, it sounds like a new boating experience for the two of you. $425 is cheap for a new boat. ;)
 

Tin Diesel

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Tin Diesel

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Just beating this topic to death, but I was wondering what the Guardian system was reacting to on the bad plugs. Might help all of us to understand this better.

This is from the Mercury spec sheet on the engine, detailing what the Guardian system monitors:

1595955466930.png

So, I'm guessing the bad plugs must have been triggering the "Knock Control"?
 

SEMPERFI8387

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Do plugs on marine engines have a significantly shorter life than on automobiles?
I would think they would foul more, as cars idle very little then get driven at typically higher rpms and burn off accumulating fuel deposits. I would think boats idle more and run at lower rpms vs the short periods of WOT or higher rpms that cars see.
 
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