Kevin,

I have a pontoon boat with a Mercury outboard.

When I turn the key to the off position, the motor does not shut off. The gauges (gas, tach, trim, etc) shut off but not the motor.

The ignition switch is a ten wire push to choke switch and the key is attached by a cord to a kill switch. When I pull the kill switch the motor still does not shut down.

Any ideas?

Thanks,

Tim

Tim,

I would trace the mageto ground wire from your engine to your ignition/kill switch. This is usually black with a yellow stripe. A break in this wire will cause the gauges to operate properly, but not the ignition and kill switch.

Kevin

Kevin,

I found the problem!

Tracing the magneto wire worked – the harness was too long and looks like it got clipped by the prop. I found two wires broken, the black/yellow wire and the black ground.

I shortened the harness to prevent this again, it was long and hanging in the way.

Thanks for your help, it turns off every time now!!

Regards,

Tim