Yamaha 30DEO won't stop when ignition turned off.

[Corystes]

2004 2 stroke 30DEO occasionally keeps running when ignition is turned off. Pulling the kill cord doesn't work either. Can be stopped by pulling out the choke on the engine. Engineer from Seastart never come across this before. Any ideas on cause and/or cure?

[99yam40]

bad connection of the ground wire or wire from CDI that the switches ground to kill the spark voltage

[boscoe99]

bad connection of the ground wire or wire from CDI that the switches ground to kill the spark voltage

Second this.

With the motor running, disconnect the male/female bullet connectors for the white wire that comes from the CDI. Then apply a ground to the female bullet connector. The motor should stop. If it does, fix the wiring or connections from the ground to the kill switch to the CDI. If grounding the white wire does not stop the motor suspect that the CDI has failed.

[Corystes]

Thanks for the info guys, especially the details and diagram for testing from boscoe99. I'll get right into checking this.