‎Incompatible with pumps having 4 bolts on the water inlet.

2 Inch Water Pump Body Housing Fit for Red Lion 2″ Gasoline Engine Aluminum Water Pump with 3 Bolts on Water Inlet, Fit for Model 6RLAG-2LST PP0100363 GNP20C 66520 100113 CUT035, NOT for 4 Bolts