Part Number: 47-30161
Sierra 18-3016-1 Raw Water Pump Impeller Kit
Keep your engine cooling system working properly with the Sierra 18-3016-1 Impeller Kit. Designed as a high-quality replacement for select marine raw water pumps, this kit restores proper water flow and helps protect your engine from overheating during demanding conditions on the water.
The raw water impeller is one of the most important maintenance components in any marine engine cooling system. Over time, the rubber vanes can become brittle, worn, or damaged from heat, sand, and continuous use. Replacing the impeller at recommended service intervals helps maintain cooling efficiency, protect internal engine components, and reduce the risk of costly repairs.
Built with durable marine-grade materials, the Sierra 18-3016-1 is engineered for dependable long-term performance in both freshwater and saltwater environments. Designed as a direct replacement for compatible OEM pump systems, it delivers reliable fitment and straightforward installation.
Common Engine Fitments
The Sierra 18-3016-1 impeller kit is commonly used on a variety of MerCruiser, OMC, Volvo Penta, and Crusader marine engine applications, including:
- MerCruiser 4.3L V6
- MerCruiser 5.0L V8
- MerCruiser 5.7L V8
- MerCruiser 7.4L V8
- OMC Cobra 5.0L and 5.7L engines
- Volvo Penta small-block V8 applications with compatible raw water pumps
- Crusader 350 CID and 454 CID marine engines
These engines are frequently found in:
- Sea Ray Sundancer and Sport models
- Chaparral SSi and Signature series
- Four Winns Horizon models
- Bayliner Ciera and Capri boats
- Malibu Sunsetter and Response models
- Supra Sunsport and Launch series
Fitment can vary depending on raw water pump style and engine configuration, so confirming compatibility with part number 18-3016-1 before ordering is recommended.
Key Features
- High-quality marine raw water pump impeller kit
- Restores proper cooling system performance
- Helps prevent overheating and premature engine wear
- Compatible with MerCruiser, OMC, Volvo Penta, and Crusader applications
- Durable marine-grade materials built for long service life
- Direct replacement for easy installation
Why Routine Impeller Service Matters
A worn impeller can reduce cooling efficiency long before complete failure occurs. Routine replacement helps maintain steady water flow, protects vital engine components, and reduces the risk of unexpected breakdowns on the water.
If you’re servicing a compatible sterndrive or inboard engine, the Sierra 18-3016-1 impeller kit delivers dependable cooling performance and reliable OEM-style fitment you can trust.