Questions & Answers for: petcock leaking position

...leaking back into the air box the petcock is not working correctly pull the tank off or disconnect the gas line and vacume line fuel should not leak out if it does the diaphram is riped replace the ...

...position. If you had the petcock turned to the correct positions, the you may want to drain the tank and remove the pet **** for inspection. If the fuel inlet tube for the ON position has fallen off, ...

...and not in the PRI position - because in the ON position, there has to be a vacuum from the carbs to allow fuel flow. No suckee no gas flow! Check the petcock itself to make sure it's not

...petcock is leaking and the fuel is flowing down the vacuum line into the engine. I would start by inspecting the vacuum fuel petcock. If you unplug the vacuum line and gas is dripping from the vacuum ...

...for fuel leakage....now manually open the petcock by setting it to the PRI for "prime" position...you will likely see fuel leaking out vacuum port. Kits to rebuild the petcock are readily

...PRIME position. Once started return the petcock to the ON position. If you leave it on prime....with engine off...fuel may leak into carb and run into engine and contaminate crankcase oil with

...you could remove vacuum line and briefly open the petcock manually using the PRI for prime position to see if fuel leaks out the vacuum port. There are rebuild kits for the vacuum operated ...

...briefly to prime and see if fuel starts leaking out the open vacuum port on the petcock. There are kits to rebuild the petcock...and definitely change your oil and filter to get the contamination

leaking petcock I just got my old honda '79 cb750k up and running. All is well but for one thing: the petcock leaks a tremendous amount of gas when in the On or Reserve positions. When it&

...leaking gas wont turn off Hi there are there three positions on the fuel petcock pri,on, res? and the fuel keeps flowing in all positions if so there is dirt or the o ring is no longer seating ...