Cylinder Scoring is a serious damage,which caused by improper use and will cost you a lot of money to repair the motor. Don't do the following will avoid cylinder Scoring: 1，start the motor on bank 2, use the motor when it stop coming out of water Even if you want test the motor, it should be done in the river! Pay Attention 1.About the noise: all the gasoline machines are noisy, currently we did not test the decibel , but the noise is the same as the motorcycle, so it is a normal phenomenon. 2.It can be marched with inflatable boats, rubber boats or fishing boats. 3.Necessary: you have to prepare a boat-motor stand or Hanging board on your boat. About certification: We can only provide CE certification, there is no other certification can be provided,thanks for your understanding. STRICTLY FOR PROFESSIONAL USE ONLY Short Shaft:40cm Type: 4 stroke 4 horsepower Capacity: 52cc Transmission ratio: 2.08 (27:13) The number of cylinders: 1 Maximum speed: 4000-5000 Maximum power: 2.8 kW /4 HP Shift position: clutch control Package volume: 95x40x30 cm Ignition system: CDI Cooling system: air cooling Starting method: Manual start Refueling: No. 93 gasoline Propeller size: 7 1/4X7-A The maximum fuel consumption: 1.4 liters / hour Recommended Lubricant:4 stroke lubricating oil Mixing ratio:Pure gasoline Trim and tilt system:Manual Tilt Cooling system: air cooling
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