follow the thick black wire from under the fly wheel cover it goes to the spark plug
Champion CJ8 spark plug is for the crsftsman 3.0 edger/trimmer
If it's the metal bar near the spark plug that you push towards the plug to kill it, all it does is ground out the plug, making it not spark. That bar is connected to the frame of the mower ie grounded which in turn grounds out the plug and wire
RJ19LM Champion
.030"
It is likely a problem with the carburetor if a lawn edger won't start. It may have clogs which are preventing the spark at the plug.
.030"
Spark Plug gap is .025
Rj19l
Spark plug gap should be .025 http://store.chainsawr.com/
.03
.030
The spark plug gap for a Murray 3.5 horsepower lawn mower should be set at .030 inches. A new spark plug will come with the gap preset and should need no further adjusting.