Sierra/Prime Line 18-3599-2 Water Pump

18-3599-2 - Sierra Marine Circulating Water Pumps. Water Pump, Circulating, Pleasurecraft, Mercruiser, OMC, Volvo Penta, Chevrolet. Cast Iron, Black. Sierra Marine Circulating Water Pumps. The water pump is the heart of your inboard or I/O cooling system. Sierra Marine offers circulating water pumps—quality replacements designed specifically for your GM, Ford, or Chrysler-based watercraft engine. Each pump is assembled using new castings, and features corrosion-resistant brass impellers, mounting gaskets, brass plugs and fittings, and is powder coated for additional protection. Order the pump best suited to your marine engine. Key features: Engineered to be an exact match to OEM pumps. Assembled with brass bi-directional impellers for installation on right hand or left hand rotating engines. Pumps include gaskets, brass plugs and fittings, stainless steel seal cup and spring (except Model 18-3599-1), and stainless steel backplate (where applicable). Powdercoated finish to stand up to harsh marine environment.