What to do when the JetSurf board does not start but the engine turns

1) Search for water in the engine (symptoms: white emulsion on the spark).
2) Check if there is no too much fuel in the engine (symptoms: the spark plug is soiled with petrol)
3) Check if there is fuel in the engine (symptoms: dry spark plug, empty fuel tubing)
4) Check if the spark plug sparks (otherwise change for a new one)
5) Look for spark plug sparking after the engine shut-off key pulling out. If the spark plug
sparks after pulled out, change the timing sensor.