Upper Unit Seal Kit – Fits MerCruiser Alpha One Gen I, R, MR, MC-1 (Replaces 26-32511A1, 18-2648) 40-140HP variations can exist even within

variations can exist even within the same model year

It is designed for models including the 165/170/3

check that the mounting hardware remains tight

Remove the serpentine belt from the idler pulley

It is engineered to stop leaks and protect internal gears from water intrusion

Upper Unit Seal Kit – Fits MerCruiser Alpha One Gen I, R, MR, MC-1 (Replaces 26-32511A1, 18-2648) 40-140HP variations can exist even withinProduct Details This Upper Unit Seal Kit is designed for MerCruiser Alpha One Gen I, R, MR, and MC 1 sterndrive upper units. It delivers reliable sealing performance for a broad range of MerCruiser models including 1A, 1B, 1C, and EZ Shift configurations, ensuring proper protection against water intrusion and fluid leakage. This aftermarket kit directly replaces Mercury Marine Quicksilver part number 26 32511A1, as well as GLM 87500 and Sierra Marine