Honda 2000i leaking gas around carb
This is NOT the rough idling due to old fuel. Been there, done that. The generator runs perfectly but leaks gas around the top of the carburetor starting a minute or so after starting it and for a...
Forum Discussion
Ski Pro 3 wrote:SidecarFlip wrote:Ski Pro 3 wrote:
Might be that the gas cap isn't venting right, over pressurizing the tank. Try running it next time with the cap loose and see if the problem goes away.
Huh???
His leak occurs shortly after starting and stops shortly after powering off. This isn't a gravity leak, it's a pressure leak. Gas tanks need to be vented for two reasons;
1. as gas leaves the tank, a vacuum forms behind it
2. as gas is agitated in a tank it vaporizes and pressurizes the tank.
It is my opinion that the genny running vibrates the tank and it builds up pressure. The cap is vented to release such pressure, but if the cap is faulty, it won't. When that happens, pressure builds up and is forced past the float valve and over fills the bowl and viola! a leak occurs. After powering off the genny, the vibrations stop and the pressure bleeds off. Once it's bled off, the leak stops.
I believe the Honda has a fuel pump, so gravity isn't an issue. Also, vapor pressure is a function of temperature, I don't think agitating the tank has anything to do with it.
I'm going with needle/float malfunction as the most likely problem here...
