what causes gas to pour out of overflow on bottom of carb?
#1
10-10-2009, 01:58 PM
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#2
10-10-2009, 02:24 PM
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10-11-2009, 11:01 AM
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10-23-2009, 10:24 AM
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99.9% of the time it's the o-ring that is on the needle valve assembly. It seals the top of the assembly from the bottom and makes the fuel only go through the opening in the valve. When it fails the fuel not only goes through the opening, but around the assembly, filling the bowl, overflowing into the head and out the vent.
#6
10-24-2009, 06:06 AM
Float valve/seat failure, as mentioned above, is the most likely cause.
A blocked tank vent can allow fumes to build enough pressure in the tank to push gas past the float valve.
On some carbs that include a primer ****, the seal on the primer piston can deteriorate which will also result in the carb overflowing.
A blocked tank vent can allow fumes to build enough pressure in the tank to push gas past the float valve.
On some carbs that include a primer ****, the seal on the primer piston can deteriorate which will also result in the carb overflowing.
#7
10-24-2009, 09:25 AM
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