Low-maintenance Hatz Diesel Engine is compact, lightweight, durable, fuel-efficient and extremely quiet. Features dry-type air cleaner, serviceable muffler and tip-over leak protection. Shaft Dimensions Diameter x L in. 1 x 2 7/16, Compression Ratio 121.5, Air Cleaner Type Dry, Lubrication System Pressurized circulation, Engine Type Diesel, HP 7, Dimensions L x W x H in. 11.6 x 14.5 x 16.9, Shaft Keyway in. 3/16, Start Type Recoil, Cylinder Bore Light alloy die cast. Air-cooled single cylinder diesel engine Small, light, powerful, and universally applicable Light alloy die cast cylinder crankcase Light alloy cylinder head Forged crankcase Light alloy piston for low free forces of gravity Fine screen filtering in main flow Tough, reliable engine uses 50 less fuel consumption than comparable gas engines 4-stroke design with flexible exhaust outlet Dry air filter and oil drain on both sides of the engine Excellent cold start performance.