Hello,
I tried to get the plug out of my head also,I started the motor for about 20 minutes,Then it came right out.I used a torx bit instead of a allen head because I had messed it up with the allen head.As for the switch,mine has a morse/fairbanks mag all i did was hook the one side to the mag. and the other to ground,when you turn the swith on it grounds the mag killing the spark.I tried the torch on the head but it's only 3" away from the gas tank.......I thought I should quit while I was ahead....
Later Tom K.