Will this kill switch work for a Mercruiser 140?

Silvertip

Honorary Supreme Mariner
Joined
Sep 22, 2003
Messages
28,772
It should work fine. However -- a universal switch has NC (normally closed) and NO (normally open) pairs of contacts. For an auto style ignition system the ignition switch system like yours you would use the contacts that are "closed" with the clip installed on the switch plunger. This allows the engine to run. If the lanyard is pulled, the switch contacts open to kill the ignition and stop the engine.
 
Top