Leaky carb

[rossco]

Float bowl. Fuel leaking around rear carb cap bolt. Fuel shouldn't be that high in the bowl. Correct? Float not cutting off supply??? Any other possibilities?

 

[Patrick67BJ8]

Float bowl. Fuel leaking around rear carb cap bolt. Fuel shouldn't be that high in the bowl. Correct? Float not cutting off supply??? Any other possibilities?

If it's leaking around the rear carb cap bolt it should also be leaking from the overflow tube. I would change the rear cap bolt gasket first or make sure it's tight/snug. I just had a float sink last week and then after fixing that with a new float the needle & seat stuck wide open on the other carb.

 

[rossco]

What I have is the lid, on top of that the fiber gasket, the bracing bracket, an aluminum washer, then the cap. The top edge of the bowl has two identical indents about a 1/16" wide at 12:00 and 6:00. How is that fiber gasket supposed to seal those little gaps? And why is the fuel pushing past that gasket? Isn"t the level supposed to be controlled at a lower point by the float?

 

[Patrick67BJ8]

What I have is the lid, on top of that the fiber gasket, the bracing bracket, an aluminum washer, then the cap. The top edge of the bowl has two identical indents about a 1/16" wide at 12:00 and 6:00. How is that fiber gasket supposed to seal those little gaps? And why is the fuel pushing past that gasket? Isn"t the level supposed to be controlled at a lower point by the float?

Can you take a pic and post it so we can see the indents you're referring to as well as the gasket?
Thanks,

 

[Keith_M]

From my understanding of your problem, I would say that you have a sunk float, a sticking needle valve, or a stuck float. My most recent overflow problem was actually a stuck float which occurred because I didn't have the float bowl straight up and down (it can rotate slightly on the body of the carburetor). Taking the top off the float bowl and checking these three things should correct the problem.

The only other thing that might cause overflow (that I can think of) would be excessive fuel pressure. If you have a stock fuel pump, that shouldn't be a problem.

 

[eskimo yo-yo]

Mine was leaking for a long time, turned out to be cracked rubber around the jet sleeve

 

[bob hughes]

Isn"t the level supposed to be controlled at a lower point by the float?

Not really, for the valve to shut off completely a fair portion of the float will be submerged.



Bob