SIERRA 118-3268 Cooling Water Impeller Key

Compatible Engines

SIERRA 118-3268 Cooling Water Impeller Key is a critical component of the cooling system, ensuring the impeller fits securely onto the shaft. Its primary role is to prevent slippage and maintain pump efficiency, which directly translates to effective heat dissipation from the engine. This part is manufactured by the reputable supplier SIERRA, guaranteeing high material quality and durability.

Due to the specific construction of outboard motors, compatibility must be verified by the manufacturer catalog number (118-3268) or the original OE number. We do not provide a list of specific brands here to avoid selection errors. If you are unsure about fitting this part to your engine, contact our customer support – we are happy to help with verification.

Installation and Maintenance

Replacing the key is a preventive measure worth performing during water pump inspections. A worn old key can cause the impeller to slip, leading to engine overheating. When installing, pay attention to the cleanliness of the shaft surface and proper seating of the element in the keyway. Using the original SIERRA part 118-3268 guarantees perfect geometric fit, extending the life of the entire pump and protecting the engine from thermal failures.

• Original SIERRA quality – guarantee of durability and precision.
• Proper pump operation – eliminates the risk of impeller slippage and pressure loss.
• Overheat protection – ensures stable coolant flow.
• Easy installation – standard replaceable element in water pump service.