Yamaha SuperJet After Capsizing: Engine Won't Start Again

After a fall the SuperJet sometimes will not start again. First the manual's instructions for after capsizing apply, then M-JET DIAGNOSTIC helps with the electrical side.

What you check

• Fault memory for code 47 (slant switch)
• Slant switch status in the live data
• Battery voltage and kill switch
• Activate ignition coils, injectors and pump individually

Slant switch and water

The slant switch shuts the engine off when capsizing. If it stays stuck in the tilted position afterwards or reports implausible values, the engine does not start. Water at connectors is the second typical cause. Check connectors for moisture before replacing components. If there is water in the engine or intake path, the craft must be treated according to the manual before you start.

Related topics

• Yamaha SuperJet 4-Stroke Won't Start: Pump, Coils, Injectors
• Yamaha SuperJet: Throttle Response and Idle with Electronic Throttle Valve
• Yamaha WaveRunner Slant Switch Fault
• Diagnostics and fault codes for your Yamaha model
• All Yamaha WaveRunner diagnostics topics

Everything runs via app over Bluetooth, for Yamaha WaveRunners from model year 2002 to today. Learn more about the M-JET DIAGNOSTIC for Yamaha WaveRunner.