Sierra 18-3599 Circulating Water Pump Replaces 8503991
Sierra 18-3599 Circulating Water Pump Replaces 8503991, Circulating Water Pump for Mercruiser,Volvo For late model GM V-6 & V-8 engines using a composite timing cover. Used on Mercruiser and Volvo Penta Marine engines. Replaces: Mercury - 811841,850399,8503991; Volvo - 3851982,3853850; Mallory - 9-42606; GLM - 15201; Redline - RL3599;