The engine can not reach the rated speed of the cause and solution?

1. The engine load is too large relative to the rated power
Solution: Reduce the load
2. The tachometer is faulty
Solution: Check with a handheld tachometer
3. Throttle control lever is improperly adjusted
Solution: Check the throttle stroke
4. The oil suction circuit is blocked
Solution: Clean the pipe
5. The governor is faulty or improperly set
Solution: Check and adjust the governor
6. The maximum speed limit of the governor is set too low
Solution: Check and adjust the governor
7. There is water in the fuel oil
Solution: Replace the fuel and install an oil-water separator