Part Number: 47-8926
Sierra 18-8926 Water Pump Impeller Kit
Protect your outboard engine and maintain reliable cooling performance with the Sierra 18-8926 Impeller Kit. Designed as a high-quality replacement for select OEM water pump systems, this kit restores proper water circulation and helps prevent overheating during extended runs and demanding conditions.
The water pump impeller is one of the most critical service items on any outboard motor. Over time, the flexible rubber vanes can wear down, harden, or become damaged from heat, debris, and dry starts. Replacing the impeller at recommended intervals helps maintain proper engine temperature, protects internal components, and reduces the risk of costly repairs.
Built using durable marine-grade materials, the Sierra 18-8926 is engineered for long-lasting performance in harsh saltwater and freshwater environments. Designed as a direct replacement for compatible lower units, it provides dependable fitment and straightforward installation for routine maintenance.
Common Engine Fitments
The Sierra 18-8926 impeller kit is commonly used on select Yamaha and Mercury high-horsepower outboard engines, including:
- Yamaha F225 four-stroke outboards
- Yamaha F250
- Yamaha F300
- Yamaha LF250 and LF300 offshore applications
- Mercury 225HP four-stroke outboards with compatible pump systems
- Mercury Verado 250 and Verado 300 applications
These engines are frequently found on:
- Offshore center consoles
- Bay boats
- Dual-console fishing boats
- Performance catamarans
- Large pontoons and saltwater fishing platforms
Popular boat brands commonly equipped with these engines include:
- Sea Hunt
- Sportsman
- Yellowfin
- Contender
- Everglades
- Freeman Boatworks
Fitment can vary depending on lower unit style and engine year, so confirming compatibility with part number 18-8926 before ordering is recommended.
Key Features
- High-quality marine water pump impeller kit
- Restores proper cooling system performance
- Helps prevent overheating and premature engine wear
- Compatible with select Yamaha and Mercury offshore outboards
- Durable marine-grade materials for long service life
- Direct replacement for straightforward installation
Why Routine Impeller Service Matters
A worn impeller can reduce cooling efficiency long before complete failure occurs. Regular replacement helps maintain steady water flow, protects critical engine components, and reduces the risk of unexpected breakdowns offshore.
If you’re servicing a compatible Yamaha or Mercury high-horsepower outboard, the Sierra 18-8926 impeller kit delivers dependable cooling performance and OEM-style reliability you can trust.