Description
SIERRA Johnson/Evinrude 8-15 HP Water Pump Impeller – 18-3050
Water-pump impeller for many 1956-1978 Johnson/Evinrude two-cylinder 8-15 HP applications using OEM 386084. Sierra designs the replacement around the specified OEM pump geometry and interchange references.
- Application: many 1956-1978 Johnson/Evinrude two-cylinder 8-15 HP applications using OEM 386084
- 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: Johnson/Evinrude Outboard: 386084
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
- Approx. outside diameter: 38.4 mm
- Approx. width: 17.8 mm
- Approx. bore: 12.75 mm
Interchange / Replaces
- Johnson/Evinrude Outboard: 386084
Related Products
- Upsell / complete repair: SIE-18-3327 | SIE-18-3400
- Cross-sell / alternative: EMP-47-00587
- Relationship notes: 18-3327 and 18-3400 are stocked Sierra pump kits for this impeller family. EMP 47-00587 is a verified direct alternative.

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