Mercruiser 3.0 help

xtremist13

Cadet
Joined
Jun 18, 2016
Messages
9
Good Evening,

I have a 2003 24 ft godfrey pontoon that has a 3.0 mercruiser with an alpha one gen 2 drive. Best speed I can get is 16.5 mph, at wot which is 3800. If my info is correct i believe that im 800-1000 rpm low of where i should be. It has a 13 pitch, 3 blade aluminum prop on it, I kind of thought with that low of pitch it would be hitting wot no problem. I changed plugs, wires, distributor, thermostat.

Does anyone have any ideas on what else I should check ? I read something about an anti siphon valve that can cause issues ? Coil ? Do these things have a fuel filter somewhere ?

I really appreciate any and all help
 

xtremist13

Cadet
Joined
Jun 18, 2016
Messages
9
one other thing id like to mention, i read somewhere that if there tis fuel in the clear tube from the carb you have a bad fuel pump, is this true ? Im alittle surprised it ran as well as it did if the pumps bad, for three days....But there is fuel in that line...
 
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