Patent ID: 6240885
Filing Date: 2001-06-05
Classification: F02B

Abstract:
A horizontally opposed four cycle inboard gasoline marine engine for small water craft which comprises:an engine block including an oil pan;a crank shaft rotationally mounted in the engine block; wherein the crank shaft is for driving a marine propulsion system used along with the engine; and, wherein the crank shaft is horizontally disposed;a flywheel connected to one end of the crank shaft; a timing belt and at least one cam shaft driven by the crank shaft through the timing belt;at least one cylinder bore located on each end of the engine block; a piston which reciprocates in each cylinder bore connected to the crank shaft through a connecting rod; a cylinder head disposed on each cylinder bore; at least two valves disposed in each cylinder head; a valve cover mounted at each end of the engine on top of each cylinder head; an engine cooling system including engine coolant fluid; and wherein each cylinder bore is at least partially surrounded by a water jacket that receives engine coolant fluid from the engine cooling system; wherein the engine cooling system is designed for marine application and therefore operates in the absence of a radiator or a fan; and wherein the engine cooling system is adapted for co-operation with a heat transfer system that uses raw water from the water resource in which the water craft is used;the engine further includes a gasoline fuel delivery system, an air induction system; and an ignition system;wherein the engine includes a front and a rear, and a top and a bottom; and wherein the overall height of the engine as measured from the top to the bottom between the front and rear of the engine is less than 5 times the bore diameter of the cylinder bores; wherein the engine is adapted for placement in an engine compartment in a small water craft of a type which includes a hull, a transom at the back of the hull, and a deck disposed above the hull;wherein the engine includes means for attachment of a marine propulsion system and wherein the engine is adapted for powering a marine propulsion system.