Patent ID: 7210441
Filing Date: 2007-05-01
Classification: F02D,F02M

Abstract:
1. A priming and purging system for an internal combustion engine having a fuel tank and a diaphragm carburetor with a fuel pump in operable communication with a crankcase of the engine to pump liquid fuel from the fuel tank into the carburetor and a metering chamber downstream from the fuel pump for regulating at least in part the flow of liquid fuel into an air-fuel mixing passage of the carburetor, the priming and purging system, comprising: a start pump having an inlet in fluid communication with the metering chamber and an outlet in fluid communication with both the engine and the fuel tank; and the start pump being actuatable to draw liquid fuel and any fuel vapor and gases from the metering chamber and to pump the liquid fuel and any fuel vapor and gases through the outlet and toward the fuel tank and at least some liquid fuel into a portion of the engine for priming the engine.