Moderated Discussion Areas
  ContinuousWave: Small Boat Electrical
  OMC Ignition switch

Post New Topic  Post Reply
search | FAQ | profile | register | author help

Author Topic:   OMC Ignition switch
sniperman1238 posted 08-17-2008 01:07 PM ET (US)   Profile for sniperman1238   Send Email to sniperman1238  
I have an older OMC Evinrude 48-HP outbord motor. The ignition switch would not shut off the motor. So I bought a new ignition switch. The old ignition switch has the poles A-B-C-S-M-M the new one has I-B-C-S-M-M. I switched out the A with the I and it does not work. It was working yesterday with the old switch just fine. [Solicits diagnostic advice.] [Solicits] a place that sells a switch identical to the old one. Thanks


seabob4 posted 08-17-2008 02:11 PM ET (US)     Profile for seabob4  Send Email to seabob4     
The [problem] may not be your switch, it may be in your engine harness. Outboards are typically shut down by applying a ground to the coils. I just recently fixed a Mercury-powered Tracker. There were two ground leads coming off the ignition switch. When I [checked the resistance] of the engine harness plug at the engine end, there was only 1-ohm. I hooked a temporary lead from [the negative terminal] at the battery, started the motor up, touched the lead to the coil ground post, and she shut right down. Somewhere in the engine harness, that shutdown circuit got interrupted. Changed out the harness, all was well.
sniperman1238 posted 08-17-2008 07:26 PM ET (US)     Profile for sniperman1238  Send Email to sniperman1238     
Thanks. I'll give that a try.
jimh posted 08-18-2008 09:00 AM ET (US)     Profile for jimh  Send Email to jimh     
For information about ignition switch wiring see

The KILL circuit operates at a rather high voltage. If the insulation on the KILL circuit conductor is damaged, you could have a short to ground on that circuit when voltage is present.

Post New Topic  Post Reply
Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.