The Mercruiser 350 Mag MPI impeller is a crucial component of the marine pump, ensuring efficient water circulation for engine cooling. Made from durable rubber, it is designed to withstand harsh marine conditions. Regular inspection and replacement are essential to prevent overheating and maintain optimal engine performance.

The Mercruiser 350 Mag MPI impeller is typically made of durable neoprene or nitrile rubber for corrosion resistance and flexibility. The size is generally around 4.5 inches in diameter with a 1-inch bore. Marine-grade materials ensure saltwater compatibility. Viscosity requirements depend on the cooling system but often align with standard marine coolant (ethylene glycol-based, 50/50 mix). Buoyancy is not a critical factor for impellers, as they operate submerged in water. The housing is usually aluminum or stainless steel for durability. Always refer to OEM specifications for exact compatibility.