How does a petcock work?
A petcock, or sometimes referred to as a fuel tap or fuel valve, is a 2 or 3 way valve on the bottom of your fuel tank. It works by directing fuel from your tank to the carburetors or fuel injectors. Fuel is pulled by either gravity or vacuum from the fuel system.
What is an engine petcock?
A petcock is a small shut-off valve used to control the flow of liquid or gas. Historically, petcocks were threaded valves controlled by a butterfly handle; modern petcocks are typically ball valves.
What is a petcock Assembly?
A petcock is simply a 2-way or 3-way valve that controls fuel flow out of the fuel tank. GL1000 Petcock. The valve positions for a manual petcock are “on,” “off” and usually “reserve.”
What does PRI mean on petcock?
PRI is for priming the carburetor. That means filling the carburetor up with gas if it is say the first time its ever been ridden or the gas was drained out for some reason.
How do you tell if petcock is on or off?
Counter clockwise is “OFF”. Clockwise is “RESERVE”. Check it by turning to the off position and pull off the gas line. If it doesn’t flow then you have it.
What does PRI mean on a petcock?
What is a vacuum petcock?
The way a vacuum petcock works is the vacuum pulls the diaphragm back, compressing a spring and releasing pressure on a ball or some other sort of valve, this allows fuel to flow around the ball and to the carb.
What does RES and PRI mean?
PRI is not primary its prime, the fuel will constantly flow on prime. RES is reserve for when you are about to run out of gas you can switch to reserve and get a few more miles out of it. On only lets the fuel flow when the engine is running.
What is PRI on fuel tank?
PRI = Prime. You could run it on reserve all the time, but then when you run out of fuel, you’re OUT. There is no more. If you have no OFF setting, then your fuel valve is vacuum-operated, so fuel will not come out until the engine is being started or is running.