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80-90131 Used with raw water pumps
visually compare your existing part to our product images and verify that the OEM part number 6AH-24410-00-00 matches what is specified for your model
Drain Gearcase Oil: Place a drain pan under the lower unit and remove the drain/fill screws to empty the gearcase oil
Brand Part Number Notes Yamaha 66T-W0078-00-00 Is superseded by 66T-W0078-01-00 and 66T-W0078-A0-00
Prepare New Pump: Lubricate the new impeller and insert it into the new housing
11-859135 Lower Gear Casing Mounting Nut for MerCruiser Alpha One Gen II | JLM Marine family-yamaha-5mlhv 80-90131 Used with raw waterLower Gear Casing Mounting Nut Fits MerCruiser Alpha One Gen II This lower gear casing mounting nut is engineered to fit MerCruiser Alpha One Gen II stern drives. Designed as a direct replacement for part number 11 859135, it ensures secure mounting and reliable performance in demanding marine environments. This aftermarket component directly replaces OEM part numbers 11 817618 and 11 859135 (also listed as 859135), providing a cost effective solution
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