The Mercruiser Alpha Impeller is a critical marine pump component designed for cooling systems in Mercruiser engines. It ensures efficient water circulation to prevent overheating during operation. Made from durable materials, it offers reliable performance in various marine conditions.

The Mercruiser Alpha Impeller is typically 4.5 inches in diameter and made of durable neoprene rubber. It operates with a viscosity range suitable for marine environments, often compatible with 10W-30 or 20W-40 marine-grade engine oil. The impeller is designed for buoyancy in water and resists corrosion. Marine pumps associated with this system are usually constructed from stainless steel or high-grade aluminum for longevity. The impeller's material ensures flexibility and resistance to wear, with a hardness rating of approximately 70-80 Shore A.