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Yamaha 200OX66 ignition problem

Old 07-16-2012, 01:57 PM
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Default Yamaha 200OX66 ignition problem

Engine starts and runs great, but 75% of the time will not cut off even if I pull the kill switch. Replace ignition switch last week but still having same problem. Couple times had to pinch the fuel line to starve engine of fuel so it would cut off.

Any ideas what problem might be?
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Old 07-16-2012, 02:57 PM
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Advice from the best

http://www.thehulltruth.com/shipyard...ching-off.html
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Old 07-16-2012, 03:10 PM
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Originally Posted by Danny View Post
Could be a sticking relay.
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Old 07-16-2012, 04:10 PM
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A white wire in the Yamaha ten pin harness grounds the CDI to kill the spark. If the kill switch and ignition switch are known to be good (white wire is being grounded when the ignition switch is off of the kill switch lanyard is pulled) then it might be that the white wire is failing open. Or, maybe the white wire is not making good contact where it makes a connection in the ten pin harness connector at the engine.

If it is not wiring then the CDI might be failing internally.
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Old 07-17-2012, 04:39 AM
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Originally Posted by jethro1 View Post
A white wire in the Yamaha ten pin harness grounds the CDI to kill the spark. If the kill switch and ignition switch are known to be good (white wire is being grounded when the ignition switch is off of the kill switch lanyard is pulled) then it might be that the white wire is failing open. Or, maybe the white wire is not making good contact where it makes a connection in the ten pin harness connector at the engine.

If it is not wiring then the CDI might be failing internally.
Turning off the ignition switch should kill the motor regardless of the kill signal.
Look at the guages when you trun off the switch and see if they are still powered. If so, I would look at the main motor relay.
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