This is a genuine Homelite replacement part. It is sold individually. By pressing the bulb it will purge the air from the carburetor. Then fuel will come up from the fuel tank through the fuel line then into the carburetor. The excess fuel will be forced back into the tank through the fuel return line. Over time the primer will lose its elasticity or crack and need to be replaced.
This replacement muffler assembly specially is specially produced by original equipment manufacturer for use with Homelite and Ryobi string trimmers. The purpose of a muffler is to soften the noise coming from the engine and provides an additional layer of filtration of exhaust. This metal muffler is designed to meet EPA exhaust regulatio...Read morens. This durable metal assemby is sold individually, please note the composite material gasket is inlcuded in this assembly.