
| Possible causes fuel system failure | 
| Cause Analysis | Method of exclusion | 
| Throttle linkage imbalance, so the carburetor throttle valve is not fully open | Re-adjust the throttle cable stretching the length of the throttle can be fully open position | 
| Propeller pitch diameter or larger | Use a smaller propeller size, to achieve the appropriate speed | 
| Boat overloaded or load improperly distributed | Load shedding or re-adjust the load distribution | 
| Transom is too low, leading to deep draft outboard boat traveling resistance increases | According to the instructions described in claim boat transom height change hanging | 
| Bottom attachments too much, too much resistance | Cleanup bottom attachments | 
| Outboard motor trim angle incorrect | Be adjusted according to the method described in the specification | 
| There are aquatic plants or other foreign material wound on a propeller or gearbox | Wound was removed and the liquidation of the propeller and gearbox underwater | 

| Possible causes of engine overheating | 
| 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 |