Which way is on for a petcock?
You are in the “ON” position. Counter clockwise is “OFF”. Clockwise is “RESERVE”. Check it by turning to the off position and pull off the gas line.
How does a fuel valve petcock work?
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. When the engine shuts off, the vacuum is removed and the fuel shuts off.
What is the function of a petcock valve?
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.
Where does a petcock go in a fuel tank?
The type of valve and the valve design differ per application. Some types of valves install within a fuel system to control the flow of gas between a fuel tank and a carburetor. Another type of petcock installs in a tank or radiator to allow a drain point for a vehicle’s coolant system.
What did petcocks used to be used for?
Historically, petcocks were used on gravity-feed fuel systems found on automobiles. With universal adoption of fuel pumps they have all but disappeared in that application.
What does the petcock do on an ATV?
The fuel valve, or fuel petcock, is a small shut-off valve that controls the flow of liquid fuel. ATVs and UTVs, like motorcycles, have fuel tanks that are situated higher than the carburetor and fuel feeds are controlled by gravity.
How does a petcock work on a motorcycle?
But sure enough, that’s the actual name of a very important part of every motorcycle fuel system. 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.
Historically, petcocks were used on gravity-feed fuel systems found on automobiles. With universal adoption of fuel pumps they have all but disappeared in that application.
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 causes fuel to leak out of a petcock?
The diaphragm material gets worn or torn and does not hold vacuum. This can cause fuel to leak through the petcock even when turned off. It is also possible to get an internal leak. This occurs when the seals inside the petcock fail and allow fuel to flow from the tank to the carburetor.