The first way is to look at the direction your inlet and outlet tube face in relation to where the spark plug is located. Look at the legs of the pump and take note of the leg that has large hole in it.
2PK Unloader Valve VRT3-310 Annovi Reverberi 4500 PSI Pressure Washer Pump
Hourleey 3/4" Shaft Horizontal Pressure Washer Pump, 3400PSI 2.5GPM, Replacement Pump for Power Washer, Power Washer Pump for Gas Washer, Compatible with Simpson, Ryobi, Honda
2800 Psi Pressure Washer Pump For Craftsman/B & S Pressure Washer Pump # 704667
TOOLCY 7/8" Shaft Vertical Pressure Washer Pump - Rear Inlet/Outlet Max 3100 PSI @ 2.5 GPM OEM & Power Washer Pump for Gas Washer, Replacement for Simpson, Honda etc
VEVOR Pressure Washer Pump, 3/4" Shaft Horizontal, 2500-3400PSI, 2.5 GPM, Replacement Power Washer Pumps, Parts Washer Pump, Compatible with Honda, Simpson, RYOBI, Briggs & Stratton, Subaru, Craftsman
Hourleey 7/8" Shaft Vertical Pressure Washer Pump, 3400PSI 2.5GPM, Replacement Pump for Power Washer Kit, Compatible with Honda, Simpson, RYOBI, Briggs & Stratton, Subaru, Craftsman
