Stop Button

[rangerbassman]

I just got finished taking three OLD late 60's, early 70's 9.8 motors and making one "running" motor. I am using a powerhead that has the ignition under the flywheel, no coils. I hooked up the water and it started right up. The stop switch on all the motors were in bad shape. There is a three wire harness running from a block on the side of the engine block that used to go to the stop switch. The ends were fraied and I got the wires separated and the engine ran on both cylinders, but at one time I think two of the wires were touching and the engine only ran on one cylinder. That may have just been a fluke. The way I'm thinking is, there is one wire from each spark source that is supose to ground through the third wire when the the stop button is pressed. Please correct me if I am wrong on this because I am thing I may just put the two wires togetherand put in a switch to ground due to not being able to find a stop switch anywhere. I may just asking some sorry parts men or they are not availble. If someone knows where I can get one please chime in.<br />Thanks, Chris

 

[WillyBWright]

Re: Stop Button

Sounds like a magneto. Joining the two may kill the spark, they cancel eachother out. So they'd have to be separate to run and together to stop. Or more likely they are both grounded to stop.

 

[rangerbassman]

Re: Stop Button

I think you are probably right. It may be hard to find a toggle switch like that. Thanks

 

[Motor Boater Bill]

Re: Stop Button

If some of your parts came off of a motor that had CDI instead of magneto, some of these had, I think, stop swith that was closed unless it was pushed, and then it opened. The magneto kill swich works the other way--open unless pushed. These would not be interchangeable. You should be able to get the older magneto-type kill switch from Grubbs (www.oldmercs.com). With the magneto ignition, you should be able to completely disconnect the kill switch and run the motor, you can kill it with the choke. This may help with troubleshooting. By the way, three wires to the kill switch sounds like the CDI-type, the mageneto kill switch should just have one or at the most two, I believe. You could check the kill swtich with an ohmeter to see if it is normally open or normally closed.

 

[rangerbassman]

Re: Stop Button

The motor runs good with all three wires disconnected from the switch. when the wires were fraid and touching each other the motor would run poorly, like on one cylinder. when I clipped off all the wire so the couldnt arch on each other the engine ran good. I had to pull the fuel lin to kill it. I could run it like that and use the choke to kill the engine but it may flood it?