Primer Bulb And Retainer Ring 640259

This is a genuine OEM approved replacement part designed for use with Toro lawnmowers with Tecumseh engines. By pressing on the purge bulb, it will force fuel into the fuel line from the fuel tank into the carburetor. Once the carburetor is full of fuel, the excess fuel will be purged back into the tank in the fuel return line. At some time the primer will lose its elasticity or crack and need to be replaced. It is made out of rubber and it is sold individually.