The Mercruiser Raw Water Impeller is a crucial component in marine cooling systems, responsible for pumping seawater to cool the engine. Made of durable rubber, it features flexible vanes that create suction and circulate water efficiently. Regular inspection and replacement are essential to prevent overheating and ensure optimal engine performance.

The Mercruiser Raw Water Impeller typically has the following specifications:

Size: Varies by model (common sizes include 3.0", 3.5", and 4.0" diameter).

Grade: Marine-grade rubber (Neoprene or Nitrile).

Viscosity: N/A (impellers are solid components, not fluids).

Buoyancy: Negligible (designed for water flow, not buoyancy).

Material: Neoprene, Nitrile, or EPDM rubber (corrosion and wear-resistant).

Blade Count: Typically 6-12 flexible vanes.

Operating Temp Range: -20°F to 180°F (-29°C to 82°C).

Max RPM: 3,500-4,500 RPM (varies by model).

Compatibility: Designed for Mercruiser stern drives and inboard engines.

Lubrication: Requires water for cooling and lubrication during operation.