HONDA PRESSURE WASHER GC160 ENGINE Leaking Gas

Fuel Pump Assembly

The GC160 often utilizes a plastic-bodied pulse fuel pump that operates via crankcase vacuum. Over time, the internal rubber diaphragm can dry rot or fail due to ethanol degradation, leading to external fuel leakage from the pump's atmospheric vent or weep hole. Replacing the entire assembly is the industry-standard fix as the plastic housing is typically sonically welded and non-serviceable.

SKU: 16700-Z0J-003

Carburetor Assembly

If the leak is originating from the air intake or the bowl area rather than the pump, the float needle is likely stuck open due to fuel deposits. This allows pressurized fuel to bypass the bowl and leak out of the carburetor throat. On Honda GC series engines, replacing the carburetor is often more cost-effective than a rebuild due to the precise nature of the internal metering orifices.

SKU: 16100-Z0L-023

Fuel Line Kit

Standard rubber fuel lines on pressure washers are subject to high vibration and UV exposure, leading to cracking at the connection points on the pump or carburetor. A visual inspection often reveals leaks at the hose clamps where the rubber has lost its elasticity.