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The best way to confirm fitment is by matching your existing impeller's part number to the ones listed in our Part Number Matrix
Thoroughly clean all mating surfaces to remove any old gasket material or corrosion
Re-attach the water hoses and securely tighten the clamps
a weak or inconsistent water stream from the "telltale" outlet
lower fuel economy
Transom Seal – Fits MerCruiser Alpha One, R, MR, MC-1 (1983–1990) (Replaces 65533A1) 210HP The best way to confirmProduct Details This Transom Seal Fits MerCruiser Alpha One, R, MR, MC 1 (19831990) (Replaces 65533A1) is designed for MerCruiser Alpha One Generation 1, R, MR, and MC 1 stern drive models from 1983 to 1990. It is engineered to create a durable seal between the gimbal housing and the transom plate, preventing water intrusion. This component is a direct cross reference for MerCruiser 65533A1, GLM 86712, and Sierra 18 2692, ensuring precise fitment and
