What happens if I leave my petcock on?
It is possible for your carbs to be leaking fuel out of the overflow tubes, worse case, fuel has gotten into the crankcase. If you smell fuel in the crankcase, change the oil before turning the engine over.
What does Prime do on petcock?
PRIME is the position used when the automatic vacuum shutoff is to be bypassed. The most common use is after a bike has been sitting a week or longer and the gas has evaporated from the bowls, or the bike has run out of gas in the ON position.
What does PRI mean on ATV?
PRI means prime, this means that the fuel line by-passes the fuel pump/filter and goes directly into the carb (usually gravity fed).
What does PRI stand for on a gas tank?
ON-RESERVE-PRI. ON is on. Reserve is reserve and PRI is Prime. Prime bypasses the diaphragm so you can fill the carbs with gas after they have been drained. Set it on PRI, fill the carbs and put it back to ON.
Can a petcock Prime run on vacume gas?
Prime is just like an ordinary petcock that doesn’t use vacume to let the gas flow. It has nothing to do with how much gas is used or how fast the tank is drained. Your float needle and seat restrict how much fuel enters the carb.
What happens when you run out of fuel on a petcock?
First is the likelihood that the carbs will overflow (see OFF above) or because the PRIME position uses the RESERVE fuel level. If you continue to operate the bike at the reserve level and run out of fuel you will be OUT OF FUEL (see pushing the bike). The failure of this shutoff system necessitates the rebuilding or replacement of the valve.
What kind of valve does a petcock engine use?
Vacuum Operated This is the most common valve found in use today. It uses engine vacuum createdwhen the engine is running to pull back a small piston that allows the fuel to flow. When the engine shuts off, the vacuum is removed and the fuel shuts off. This valve also has three positions: ON – RESERVE – PRIME
How to test the petcock on a Suzuki?
Disconnect the fuel line at the carb, and run the hose into a gas can. Turn the petcock to prime and let the gas drain into the can. Remove the vacuum line, and block off the vacuum tap on the carb… (use a screw, gas resistant rubber cap, golf tee,.. whatever)… Remove the old petcock (two screws)…
Prime is just like an ordinary petcock that doesn’t use vacume to let the gas flow. It has nothing to do with how much gas is used or how fast the tank is drained. Your float needle and seat restrict how much fuel enters the carb.
Where is the petcock valve on a motorcycle?
Petcock Operation Gasoline essential to the proper operation of your motorcycle is controlled by a “Fuel Control Valve” otherwise known as a “Petcock”. This valve is characteristically located at the bottom of the fuel tank and can have a number of different configurations. Fuel-Injected motorcycles rarely have a petcock.
Why do you need to turn off the gas on a petcock?
The tendency for people to overlook this needed shutting off of the fuel is what necessitated the next type of fuel valve. The wear that goes with age and miles reduces the carburetor float valves’ ability to shut off the gas (we are replacing a lot of float valves in the shop) makes turning off the gas even more imperative. 2.) Vacuum Operated
What does petcock stand for on Suzuki PRI?
The mysterious “PRI” on your fuel petcock does indeed stand for “prime”. The only purpose of this selection is the event you work on the carb, or drain the fuel, you can select “pri to fill the float bowl, without having to crank the engine.