50 hp force carb problem

[xntric1]

I have this 50 hp force motor that is really beginning to get on my nerves and hope someone can relieve a little of my stress. The symptom (probably needless to say) is running fine at low speeds but up near and at full throttle gas spits out of the side of the carb and engine will begin to act up until I back off on the throttle to half or less. All indications of my issue seem to point to one or more of the following; (a) a stuck float (b) bad needle valve seat (c) float not set correctly (d) float not "floating" any more or (d) crap in the fuel/lines etc. I've eliminated all of these. I'm wondering now if it is possible that the fuel pump is just pumping too much pressure...and if so, any way to cut it back. ? Will a fuel filter between the pump and carb do this? Thanks in advance for anyone who would like to help!!

p.s. I've had this motor for a couple of seasons and it has been acting this way for nearly since i got it. Its a mid-80's engine and I know very little about the history of it.

 

[fucawi]

Re: 50 hp force carb problem

Whatever you say you have done it sounds like a float level. needle valve seat problem to me as the pump is over powering the valve ....I dont think the pump can produce pressure higher than the makers intended ..replace the seat and valve

 

[bentle]

Re: 50 hp force carb problem

Yep sounds like either a float prob. Or needle. Have you checked float to see if it is full
of fuel causing what may appear to be a stuck float. Could also be that the float is hitting
up inside the carb housing when the bowl is full of fuel and not allowing the needle
to seat or close properly. Unless you are running an electric fuel pump? The manual pump
on the motor shouldn't be over pumping fuel to carb. The fuel filter will only help to catch debris
from entering carbs and causing carb failure. Carb kits are fairly cheap and worth the rebuild if you haven't already done it. Recheck needle and float first, could be an easy fix.