Mercruiser 3.0 help

[xtremist13]

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]

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...

 

[Scott Danforth]

Yes, if you have fuel in the clear line , you need to replace your fuel pump. They are about $50

After replacing your pump, change oil and check compression

 

[Grub54891]

As stated, if there is fuel in that line, the pump is bad. On a car that line doesn’t exist, a car will dump fuel on the ground or into the oil. On a boat if it did that it would put fuel in the bilge and cause an explosion And fuel in your oil. Be sure to replace with a marine fuel pump.