| Cause Analysis | Method of exclusion |
Thermostat failure or blockage | Repair or replacement of new products |
| Clogged inlet gearbox | Clear filter blockage |
Damaged water pump impeller or pump floor, severely worn pump housing wall | Replace damaged parts |
Transom is too high, leading to the gearbox out of the water intake | Press the manual explains, change the height of the transom of the boat |
| Excessive piston top coke | Disassemble engine maintenance, remove carbon deposits |
| Propeller blades bent or broken | Repair or replacement of the propeller |
| There are aquatic or foreign material is wound on the propeller | Stop, tilt the propeller, remove the winding material |
| Engine mounting bolts loose | Tighten mounting bolts |
| Upper or lower damping block Outboard damage | Replace damaged damping block |
| A cylinder engine inoperative | Check the electrical parts or the spark plug, the timely replacement |
| Lack of engine power, speed instability | Check the propeller is slipping, immediately replace |
