The Jabsco engine cooling pump for Crusader engines is designed to be a direct replacement for the stock Crusader pump Model No. 97179 (Sherwood E-35). It accepts the stock Crusader pulley and bolts directly to the Crusader mounting bracket. The 1" NPT internal threads in the ports accept the stock hose adapters. The Jabsco pump impeller (18948-0001-P) can be used in either the Jabsco pump or the stock Crusader pump replacing the Crusader impeller no. 20300. Neoprene impeller Bronze body Stainless steel shaft