Starting today, whenever I turn the ignition key in the off position the motor does not turn off. All the gauges power off but the motor does not. The kill switch does not turn the motor off either. Had to choke the running motor to get it to turn off. I have no clue on this one so any advice is greatly appreciated.
Read on a different website about someone with the same issues. The guy only had the issue whenever the motor was warm. If the motor was “cold” he could start it up and cut it off normally, but after the motor ran for a while and warmed up he’d have the same issue as you described. It turned out to be a shorted diode income electrical component (ECU or ECM maybe?). I’ll see if I can find the link.
I had a similar problem on the 'toonboat. Turned out to be some of the wiring under the floor had been chewed up by some varmit, apparently a muskrat. Check the wiring harness from the key to the motor.
Crank it with ear muffs or in a barrel. Turn the key off and if it is still running walk around the motor shaking the wiring harness. I had a 35 Evinrude that would start but not shut off and found a broken connection by playing with the wires.
16’ Bonito 65 Johnson
Yep, bad connection somewhere, these motors are shut off by grounding the ignition from the key or safety lanyard. When neither work the problem is somewhere rearward of the console/controls.
2005 Sea Hunt 212 Triton
“Head East”
replace key switch
ignition circuit is grounded and kills spark when key is turned off
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Is there something to check to narrow it down to the switch? Would hate to buy/install if not needed. Thanks
With motor running turn sw off if it continues to run then pull safety lanyard…
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Unfortunately, that does not work either.
Remove the black and yellow wire on the switch , if motor runs it is the switch . If I got my colors right .
It might be a loose nut behind the steering wheel 
look to see if there is a multi-pole relay that is energized when sw
is turned on , if so the ign system circuit could be faulty, not a common type system that could have been shade-treed!![:0]
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When you see “Old Glory” waving in the breeze, know that it is the dying breaths of our fallen hero’s that makes it wave.
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Thanks all. Out of town and will dive in when I return. Thanks again
WHAT TYPE OF MOTOR???
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2000 Yamaha two stroke 115
jump the white wire to the black wire on the back of the switch and it should shut down the motor if its a key switch problem
white wire is engine stop wire
black is ground
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