Impeller - Mercury Marine - 47-20813

Sierra impellers and impeller kits are crucial components for maintaining the cooling system of marine engines. These high-quality replacement parts are designed to meet or exceed OEM specifications, ensuring reliable performance for various boat models and engine types.

Sierra manufactures impellers that are engineered to withstand the harsh marine environment and meet the demands of today's high-horsepower engines. The 18-30* series of impellers, including popular models like the 18-3059 and 18-3040, are compatible with a wide range of outboard motors and stern drives from manufacturers such as Johnson, Evinrude, Yamaha, and Mercury.

Key Features of Sierra Impellers

• Durability: Sierra impellers are built to provide maximum durability and long life.
• Compatibility: They are designed to fit various engine models, making them versatile replacements.
• Quality: All Sierra marine products meet or exceed the specifications of the original equipment parts they replace.

Benefits of Using Sierra Impeller Kits

• Cost-effective: Sierra kits often offer a more affordable alternative to OEM parts without compromising on quality.
• Convenience: Kits typically include all necessary components for a complete water pump service, including gaskets and O-rings.
• Reliability: Many boaters and technicians trust Sierra parts for both routine maintenance and unexpected repairs.

Choosing the Right Impeller

When selecting a Sierra impeller, it's crucial to consider factors such as:

• Engine make and model
• Horsepower rating
• Number of blades and splines
• Material (typically neoprene for most applications, some are made of nitrile, which are more resistant to oil and fuel)

Always consult your engine's manual or a marine professional to ensure you choose the correct impeller for your specific application.

FAQs

Are Sierra impellers as good as OEM parts?
While opinions vary, many boaters find Sierra impellers to be comparable in quality to OEM parts. Some Sierra impellers are even manufactured in the same facilities as OEM components.

How often should I replace my boat's impeller?
It's generally recommended to replace impellers annually or every 100 hours of operation, whichever comes first. However, always follow your engine manufacturer's guidelines.

Can I use a Sierra impeller kit for my Mercury engine?
Yes, Sierra offers impeller kits compatible with various Mercury engines. However, it's essential to verify the specific part number for your engine model to ensure proper fit and function.

By choosing Sierra impellers and impeller kits, boaters can maintain their engines effectively while potentially saving on maintenance costs. Always prioritize regular inspections and timely replacements to ensure optimal engine cooling and performance.