Re: kill switch on a 1972 cobia with a 70 horse evinrude
OK, purple, black, and gray wires are used to connect a tachometer. As for the rest of the story, at the key switch, purple is "hot" when key is turned on. Black is ground. White is start. Black with yellow stripe is kill wire. Neither purple nor grey have anything to do with killing the motor. Black (ground) is used with Black/yellow to kill it. NEVER connect the purple to the Black/yellow in any way!!!
Re-read my previous post. Exactly what I said.
Hm.m.m.m, we are on the right subject aren't we? You are trying to install a kill switch, meaning one that stops the motor if you fall out of the boat---right??
EDIT: No black/yellow wire???? Then maybe you have a 60hp. That is a whole 'nother story. Sure would help to know what we are working on. How about posting a couple of pictures of the powerhead showing the electrics? OR, at least, tell us this: Do your spark plug wires come out of a black plastic distributor cap below the flywheel? Or does it have three individual coils, with a spark plug wire coming from each and going to directly to each spark plug? Makes a BIG difference.