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An inboard engine cooling system works by keeping your boat's engine from overheating. It also ensures that it's operating at its best and at peak efficiency. Because of this, it's important to keep your inboard motor cooling system maintained and updated. After all, it's the lifeblood of your boat's engine. At Discount Inboard Marine, we carry a wide selection of inboard cooling system parts and accessories. You'll find everything from impellers and raw water pumps to gaskets and circulation pumps. Shop Discount Inboard Marine today to keep your inboard engine cooling system running right.