The Mercruiser 8.1 Raw Water Pump is a marine pump designed to circulate raw water for engine cooling. It ensures efficient cooling by drawing water from the surrounding environment. This pump is essential for maintaining optimal engine performance in marine applications.

The Mercruiser 8.1 Raw Water Pump is designed for marine applications. Key specifications include:

- Size: Typically 1.25" to 1.5" inlet/outlet ports

- Grade: Marine-grade construction for saltwater/freshwater use

- Viscosity: Compatible with standard marine coolant/water mixtures

- Buoyancy: Not applicable (non-buoyant component)

- Material: Cast aluminum housing, stainless steel shaft, nitrile or neoprene impeller

- Flow Rate: Approximately 30-40 GPM (varies by model)

- Pressure Rating: 10-15 PSI (typical)

- Drive Type: Belt-driven (serpentine or V-belt depending on configuration)

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

- Compatibility: Fits Mercruiser 8.1L Horizon engines