Force 120 O/B cuttin out

[kjcooperncsu]

I have a 1994 Force 120 O/B that is giving me some problems. The engine will run fine for a period of time 20-30 mins. Then it will begin cutting out/sputtering at WOT. The problem will progressively get worst until I can't even get the boat to plane out anymore. The engine starts fine (for a Force). It also idles with no problems even at high RPMs while in neutral.

So far, I have checked the spark (good) and went ahead and replaced the plugs as good measure. I have also rebuilt the Carbs(they were pretty nasty), and ran the engine with a seperate gas tank. There was some water in the tank, so I added a seperator and drained the tank. I have a clear fuel filter and don't see any trash. Also compression check is good.

When it starts sputtering, I have pulled the cowl off and can see gas spraying in the carbs and the primer bulb stays firm so I haven't suspected a fuel pump issue yet (but I might go into it next anyways, even though it was rebuilt just last year.)

I'm going to go back into the carb bowl and see if I pulled anything into them again prior to using the seperate tank and installing the seperator.

I'm kind of at a loss right now. Please help.

Kyle

 

[captainmar]

Re: Force 120 O/B cuttin out

I too have had this problem with my 1987 125 force. I have taken the same steps. Does it feel like someone is moving the throttle back and forth?

I found if you just let the boat sit over the winter then it will work for about 3 weeks then start happening again. I wish I could say that I have a better answer.

 

[81 charger]

Re: Force 120 O/B cuttin out

put in a new ignition switch. you would be suprised what a 9 dollar key switch from auto zone will do

 

[jerryjerry05]

Re: Force 120 O/B cuttin out

I see what most of your problem is :The engine starts fine (for a Force). To quote you!!
It doesn't like you and your anti Force attitude!!!

Sounds like the tank vent is clogged.
Did it run ok on the spare tank?
Ethanol??Location??Change the hoses.
Primer bulb shouldn't stay hard after starting.
Check the fuel pump diaphram.

 

[Jiggz]

Re: Force 120 O/B cuttin out

I'll second the motion for fuel pump problem. There is another filter on top of the fuel pump have you checked it for debris? If so then it could be the diaphragm.

 

[foodfisher]

Re: Force 120 O/B cuttin out

OK, if you're anywhere close to me, I'll give you $250 for that dasturdly Force.