86 FORCE 125hp bogs at WOT

[pemberton5]

Someone please HELP I have a force 125hp thats runs good at idle and 1/2 and even 3/4 throttle but at wot it bogs down and stalls. I have replaced fuel pump diaphram twice and check valve also hoses primer bulb and pulled pick tube from gas tank as well as cleaned the vent tube , new spark plugs carbs were gone rebult two years ago and still engine wont go WOT. any help is needed bad PLEASE !!!!!!!!!!!

 

[bustermin]

Re: 86 FORCE 125hp bogs at WOT

please give a little history, did this just start, or did you just start using the boat after it sat for the winter (or longer). did anyone work on it prior to it acting this way? did you just buy the vessel, if it was winterized prior to this hapening, what was done to winterize it and what was done when you took it out?

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

yes this just started i have had the boat for two years and ran fine except ! for an occasional die at idle i winterized boat and ran it twice this year when the problems began i getting ready to take to boat shop but darn the so expensive.i put the new plugs in it and checked fluids and greased zerts before takin it out plugs looked good i took out but replaced any way. then after couple trips when probs started and i put all the other stuff on.

 

[bustermin]

Re: 86 FORCE 125hp bogs at WOT

you didnt mention the fuel filters, have you changed those? also have you checked the fuel lines, are they sucking closed when you are at wot, just because they look good on the outside doesnt mean they are good on the inside.

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

yes changed screen in sediment bowl as well as new gasket replaced the glass in line filter too.???

 

[Jabongans]

Re: 86 FORCE 125hp bogs at WOT

I have an 87 Force 125HP with same problem. Two different mechanics told me my lower carburetor is bad - but neither can find the parts/replacement.

 

[bustermin]

Re: 86 FORCE 125hp bogs at WOT

did you look at the spark plugs, is it running too lean?

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

did you look at the spark plugs, is it running too lean?

have not looked at them since replaced what would they look like if they are running to lean ??

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

I have an 87 Force 125HP with same problem. Two different mechanics told me my lower carburetor is bad - but neither can find the parts/replacement.

Crowley marine on internet has lots of parts i by lots there also try ebay. wat ahve you done to your motor to try solve prob mine is surely pi##in me off

 

[bustermin]

Re: 86 FORCE 125hp bogs at WOT

A white colored plug is caused by engine overheating. Failure to repair this engine will result in severe engine damage. Common causes for this are:

Incorrect spark plug (too hot heat range).

Low octane fuel.

Timing is not set properly.

Cooling problems, (dirty cylinder fins, no or low water if water cooled, low or no engine oil).

Carburetor air/fuel mixture is too lean (too much air).

Leaking crankshaft seals, no oil, base or head gasket leaks, or crankcase leaks on two stroke engines.

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

A white colored plug is caused by engine overheating. Failure to repair this engine will result in severe engine damage. Common causes for this are:

Incorrect spark plug (too hot heat range).

Low octane fuel.

Timing is not set properly.

Cooling problems, (dirty cylinder fins, no or low water if water cooled, low or no engine oil).

Carburetor air/fuel mixture is too lean (too much air).

Leaking crankshaft seals, no oil, base or head gasket leaks, or crankcase leaks on two stroke engines.

I will look my plugs are the flat champion ul18v i think there is no gapping to them

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

Any other ideas headed home to start on motor again !!!!

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

I will look my plugs are the flat champion ul18v i think there is no gapping to them

any other ideas headed home to start again then off to boat shop dunno wat else to do .

 

[Unbalanced]

Re: 86 FORCE 125hp bogs at WOT

Sounds like a fuel delivery problem. WOT is where fuel delivery is at its highest. The fuel system seems like it's just not keeping up. Have you tried pumping the bulb at WOT? There could be a restriction in the fuel line or the floats aren't set properly.

 

[pemberton5]

Re: 86 FORCE 125hp bogs at WOT

Sounds like a fuel delivery problem. WOT is where fuel delivery is at its highest. The fuel system seems like it's just not keeping up. Have you tried pumping the bulb at WOT? There could be a restriction in the fuel line or the floats aren't set properly.

yes at wot if we pump bulb boat runs fine but have tried out of another tank and does the same thing fuel system is not keepin up you are correct. dunno much bout carbs thats beyond me however i took it too boat dr guess ill see tired of jackin with it need NEW ONE !!

 

[4runneradam]

Re: 86 FORCE 125hp bogs at WOT

Did you figure this out yet? Mine started doing the same thing today. Worked fine the last time out, now it wants to cut out at WOT. I have a clear fuel filter and I can see its empty.

 

[john from md]

Re: 86 FORCE 125hp bogs at WOT

There are three check valves inside the fuel pump housing. If they are sticking it will give you those kinds of symtoms. They cost $5 each, two are easy to change, one requires some finesse.

John

 

[87blf125]

Re: 86 FORCE 125hp bogs at WOT

i have an 87 force 125 that did the same thing, it turned out to be the floats on the carbs were set to low, i reset them and have had no problems. give it a try, hope it helps!

 

[john from md]

Re: 86 FORCE 125hp bogs at WOT

Let us know if you solved your problem.

John