Quote:
Originally Posted by cth350
it means the bowls won't fill fast enough.
Carefully disassemble the valve and soak it a bit in something that removes gunk. (kerosene; simple green, etc).
The diaphragm is likely kaput and needs to be replaced. It's not cheap, so don't help it along by flexing it by hand.
Don't break the bronze housing by over tightening it on reassembly. Hand tight until it doesn't leak is fine. The two crush washers that surround the banjo fitting can be reused if they are not overly damaged from the last guy overdoing the tightening.
-CTH
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The bronze housing is soft metal that breaks if over tightened. The replacement part was $259.00 five years ago! Luckily I had an extra one to replace the one I destroyed.
By wide open, you mean pushed all the way in? I would think that wide open would not effect your full throttle fuel delivery. The valve is intended to return fuel to the fuel tank or limit the amount of fuel flow to the carburetors when you let off the throttle and at idle. If it was stuck in the out position I could see fuel flow as an issue at wide open throttle. Another possibility is that valve is pushed in, but clogged so fuel is not flowing.