Some premium versions may even use upgraded materials like Viton for enhanced durability
A visual inspection for cracks
It is designed for reliable performance in fresh-water cooled inboard diesel engines
The best way to confirm fitment is by matching your existing impeller's part number to the ones listed in our Part Number Matrix
remove the old impeller from the pump housing
Transom Seal – Fits MerCruiser Alpha One, R, MR, MC-1 (1983–1990) (Replaces 65533A1) 210HP Some premium versions may evenProduct 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