The impeller for a 40 HP Mercury marine pump is designed to efficiently move water for cooling and circulation. It features durable rubber or neoprene construction to withstand harsh marine conditions. This essential component ensures optimal engine performance by maintaining proper water flow.

Size: 4.5 inches (Diameter)

Grade: Marine Grade

Viscosity: Suitable for 10W-30 to 25W-40 marine engine oils

Buoyancy: Neutral (Designed for submerged operation)

Material: High-performance reinforced nylon or stainless steel

Rotation: Clockwise (Standard for Mercury marine pumps)

Blade Count: 8-10 blades (Optimized for 40 HP Mercury engines)

Operating Temperature: -20°F to 200°F (-29°C to 93°C)

Pressure Rating: 30-50 PSI (Pump-dependent)

Compatibility: Mercury Marine 40 HP outboard cooling systems