Yamaha 4 hp two-stroke outboards models: 4ACMHS (imported) Horsepower: 4 hp Engine Type: Two-stroke single cylinder transom height (mm mm): 445 corresponds to the maximum output power propeller speed (r / m): 2.9KW (4PS) / 5000 maximum fuel consumption / L / H: 2.2 random tank: Built-in cooling system: water-start system: handle oil supply: premixed propeller pitch: 7 "Aluminum Compression ratio: 7 Fuel supply system: Carb Ignition: CDI- Micro-computer ratio: 27: 13 (2.08) Alternator: 60W Displacement (cm3): 83 Weight (kg): 21.5 cubic volume: 0.244 Yamaha (Yamaha) marine engine with stable performance, high-powered, low fuel consumption sewage fewer features, excellent rust and corrosion systems can help increase the durability of the outboard motor, and its durability is a recognized brand marine engines currently.