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-   -   Kill Switch (https://www.rcuniverse.com/forum/gas-engines-142/4379339-kill-switch.html)

mackey1 06-11-2006 07:38 PM

Kill Switch
 
Hi,
I bought a used Q35 with spring starter and original coil / magneto ignition. The coil has the sparkplug wire coming from it and one spade terminal. I assumed the spade terminal if taken to ground would kill the ignition. I wired in a on/off switch between the spade terminal and the engine case. In checking the electrical continuity to determine the on vs off position of the switch, I find that this terminal is already grounded to the case. I assume internally. The switch does not break continuity. Take the switch completely out and it changes nothing.

What am I missing here? Is the coil shorted internally? Did I assume incorrectly that the spade terminal was to be used for a kill switch? Help!

Bill

beepee 06-12-2006 06:46 AM

RE: Kill Switch
 
mackey1,

Don't concern yourself too much with a continuity test. I did the same thing with one of mine and got what I thought was a strange result too. Those coils are nearly bulletproof. Continue as you have been going, you are on the right track.

Have fun!

Bedford

BillS 06-12-2006 07:56 AM

RE: Kill Switch
 


ORIGINAL: mackey1

Hi,
I bought a used Q35 with spring starter and original coil / magneto ignition. The coil has the sparkplug wire coming from it and one spade terminal. I assumed the spade terminal if taken to ground would kill the ignition. I wired in a on/off switch between the spade terminal and the engine case. In checking the electrical continuity to determine the on vs off position of the switch, I find that this terminal is already grounded to the case. I assume internally. The switch does not break continuity. Take the switch completely out and it changes nothing.

What am I missing here? Is the coil shorted internally? Did I assume incorrectly that the spade terminal was to be used for a kill switch? Help!

Bill
Grounding the spade terminal to the engine case will kill the engine.

You have turned theoretical on us and probably haven’t grounded the coil with the engine running.

The coil has very fine wire with only a few ohm resistance. A continuity test is not definitive.

Bill


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