Installing kill switch on 1984 Mercury 150hp - Two kill wires coming from ingition

[NeBassKa]

I'm trying to install a kill switch on my boat that has a 1984 Mercury 150hp o/b motor. I took the throttle assembly apart and there are two black/yellow wires connected to same terminal on the ignition. I'm not sure which one to splice into to install the kill switch. Any advice?

 

[alldodge]

You need to ground the Blk/Yel wire when the kill switch is pulled. Note the kill switch on this control has one Black and one Blk/Yel wire. With lanyard attached there will be no connection between the two wires. The on below is from an Rude but connection will be the same

 

[NeBassKa]

Thanks AllDodge! Yep, this did the trick. I ran a wire from the BLK/YLW connection to the kill switch, then the other side to the BLK ground connector. One thing though... it didn't work on the M/M connectors on the switch. When I did, it wouldn't start. So I tried connecting to the C/C connectors. Works perfect! Thanks for the great diagram and advice!

I'm a new owner of an older bass boat. Bought it to use for my son's high school bass club. So I'm new at all this... lol. Really appreciate the guidance!

 

[alldodge]

That doesn't sound right, but so long as the motor dies when the lanyard is pulled you should be good.