This tiny marine engine was designed and sold as a casting kit by Edgar Westbury of England. Jim Hawk made several modifications to the original design to improve efficiency and performance. He increased the flow of coolant by fabricating centrifugal water pump to replace the original small gear pump. Jim also designed a new dry sump lubrication system and improved the compression ratio by fabricating pistons with oil control rings, a stronger head and combustion chamber—as well as stronger, lighter alloy connecting rods. The 4-cylinder, 4-cycle, water-cooled engine is 13″-long, 6″-wide, and 9″-high.