Low RPM on 99 3.0

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Jul 2, 2012
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i have just bought a boat wellcaft exel 18 with a merc 3.0 last owner told me he had mounted a new top on it with bigger valves an larger gates.. i cant get more than 3300 RPMs, it planes nice and sounds nice but i am missing allot of power.. could it be the new top? manifold is original so is the carb..
 

Bondo

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Re: Low RPM on 99 3.0

i have just bought a boat wellcaft exel 18 with a merc 3.0 last owner told me he had mounted a new top on it with bigger valves an larger gates.. i cant get more than 3300 RPMs, it planes nice and sounds nice but i am missing allot of power.. could it be the new top? manifold is original so is the carb..

Ayuh,... Welcome Aboard,... Ya mean it's got a new, different Head on the motor,..??

That wouldn't be a problem by itself, but the carb probably needs Tuning...
 
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