The Mercruiser 165 Impeller is a critical component of the marine cooling system. It ensures proper water circulation to prevent engine overheating. This durable impeller is designed for reliable performance in marine environments.

The Mercruiser 165 Impeller is typically made of neoprene or nitrile rubber for durability and resistance to marine conditions. It has an approximate diameter of 4.5 inches and a thickness of around 1 inch. The impeller is designed for use with marine-grade lubrication, often requiring a viscosity of SAE 30 or equivalent. Buoyancy is not a critical specification, as it operates submerged in water. The material ensures resistance to saltwater, oil, and fuel exposure.

Marine pumps for the Mercruiser 165 are usually constructed from cast aluminum or stainless steel for corrosion resistance. The impeller housing is often bronze or composite for longevity. Pump flow rates vary but typically range between 25-35 gallons per minute (GPM). Seal materials are commonly Viton or Buna-N for chemical and temperature resistance. Proper alignment and gasket integrity are essential for optimal performance.