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!

When there is no water coming out from the motor,please stop using it immediately ,then check the impeller of Water pump or check if the water outlet has been blocked.

 Must Read before use:

Four stroke 4 hp: 

Firstly,Fill the gear oil (open gear box lid and fill it).

Secondly, Fill NO. 92 petrol, lightly press oil pump 6-10 times. 

Thirdly,Fill engine oil don't exceed the head of the pattern.

Forthly,turn the throttle to the start up and turn the accelerator gets up to 50%.

Then,Rapidly pull the starter line. 

After the motor start ,please turn the throttle to running state.

Then, it can be operated now. please remember to replace the gear oil after the run-in period(10 hours) 

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.The machine itself is lightweight, it can use on boat weight of 100kg or less , load-bearing 4 people, but the speed is certainly not the same when one person on it or 4 people on it . Customer who has high expectations on speed, please be noticed

3.It can be marched with inflatable boats, rubber boats or fishing boats

4.Necessary: you have to prepare a boat-motor stand or Hanging board on your boat

5. About certification: We can only provide CE certification, there is no other certification can be provided,thanks for your understanding.