The oil drain plug is located on the bottom of the engine underneath the edger. It takes 20 ounces of SAE30 weight oil. I recommend you use synthetic oil in any air cooled engine. Change the oil every 25 hours. Click the link to download an owners manual.
Champion CJ8 spark plug is for the crsftsman 3.0 edger/trimmer
follow the thick black wire from under the fly wheel cover it goes to the spark plug
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
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"
.030"
Where is oil plug
Rj19l
My 16" Craftsman 36 cc chainsaw manual calls out for a Champion RCJ7Y....if that is the same size chainsaw as yours, I would go with that plug.
Spark Plug gap is .025
Your owner's manual should explain that.