Description
SIERRA Johnson/Evinrude Water Pump Impeller – 18-3002
Water-pump impeller for Johnson/Evinrude outboards using OEM 375638 / 775518. Sierra designs the replacement around the specified OEM pump geometry and interchange references.
- Application: Johnson/Evinrude outboards using OEM 375638 / 775518
- Function: Circulates raw cooling water through the engine cooling system; a worn, hardened or damaged impeller can reduce water flow and cause overheating.
- Component: Flexible water-pump impeller
- Blade count: 6
- Interchange: GLM: 89650; Johnson/Evinrude Outboard: 375638, 775518; Mallory: 9-45215, 9-45215-10
Verify the engine model, serial range, pump housing and original impeller number before installation. Inspect the housing, wear plate, key and gaskets at the same time; replace damaged companion parts rather than installing a new impeller into a worn pump.
Specifications
- Component: Flexible water-pump impeller
- Blade count: 6
- Outside diameter: 2-3/4 in.
- Depth: 7/8 in.
- Shaft diameter: 3/4 in.
- Material: Neoprene
Interchange / Replaces
- GLM: 89650
- Johnson/Evinrude Outboard: 375638, 775518
- Mallory: 9-45215, 9-45215-10
Related Products
- Upsell / complete repair: SIE-18-3377
- Relationship notes: 18-3377 is a stocked Sierra water-pump repair kit documented to use/include this impeller.

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