18-3057 Water Pump Impeller
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Sierra water pump impellers are manufactured to stringent quality standards and are fully interchangeable with the OEM products they are designed to replace.
Sierra manufacturers impellers and water pump repair kits for most outboard, inboard and sterndrive applications. Sierra impellers and water pump repair kits are designed to directly replace the original OEM parts. All parts are manufactured to stringent quality standards.
The impeller is the heart of an engine's cooling system. Visual inspecton is recommended every year. Replacement is recommended every three years. Saltwater use and/or excessive use may make replacement advisable more often.
Caution: Running an engine without water can damage an impeller in as little as 15 seconds. Always start your engine with the water intake valve open, or in the case of an I/O or outboard, with the water intake in the water or with engine flushing mitts attached.
Key Features
- Impellers and water pump repair kits are manufactured to match the original part and are fully interchangeable with the OEM products they are designed to replace
- Recommended replacement schedule is every 3 years for freshwater and every year for saltwater
OEM/Sierra Part Number Interchange
This impeller fits various 15 thru 25hp outboards. Applications include Chrysler/Force/US Marine, GLM, Mallory and Mercury Marine.
| Application | OEM Part Number |
|---|---|
| Chrysler/Force/US Marine | 47-850893 |
| GLM | 89640 |
| Mallory | 9-45303, 9-45303-10 |
| Mercury Marine | 47-850893, 47-85089 10, 47-8508920, 47-8M0027792, 47-850891, 47-85089, 47-8M0024502 |
The Sierra Engine Parts Selector
In addition to impellers, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, model or year of manufacture.
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