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Idk

Rshelhorse

New member
I have a 1999 mercury 175 efi ser# 0G826991 took out for the first time and it ran good we ran 63mph and it just quit like someone turned the key off but started right back up the more I tried to get it back on plane the faster it would shut down I idled back to the dock. Any help or direction would help me greatly thanks Rickey
 
If it's shutting off suddenly as if the key is being turned off, and you have no other symptoms? Like nothing that indicates a fuel delivery problem or other ignition failure? Then you're in luck because if THAT'S the only thing it's doing, then it's likely in one of the kill circuits. An easy fix. When I had that exact condition, it was a bad ignition key assembly which was grounding out my lanyard kill switch. It may also be your mercury switch. Something is sending your spark to ground. Check everythng with a black/yellow wire and I bet you'll find it.
 
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