Boat engine gaskets prevent both internal and external leaks of oil, water and fuel. Keep fluids where they should be with the help of Discount Inboard Marine. A marine water pump gasket fills the gap between the engine and your boat's water pump, preventing coolant from leaking. A marine engine head gasket is compressed between the engine and the cylinder head, keeping the coolant and oil from mixing. And an exhaust manifold and riser carry hot exhaust gasses away from the engine, keeping them separate from the cooling water. We know that boat engine gaskets are necessary to seal your boat properly. It's why we offer the best selection of marine head gaskets, water pump gaskets and so much more — all at affordable prices.