Most snow blowers have the spark plug on top of the motor :to change a spark plug you get a spark plug wrench (take wire cap off the plug) put wrench on spark plug then turn counter clock wise to take it out. To put a new one back in reverse the proses
Spark Plug gap is .025
Champion RDJ7Y is the correct number.
Mine has original plug, it is a: Champion # CJ8Y
.030"
.030"
http://www.toro.com/home/customercare/interactivemanuals.html Snowthrowers Single Stage Snowthrower TOC Maintenance Spark Plug Conditions Page down to Replacing a Spark Plug
Rj19l
Spark plug gap should be .025 http://store.chainsawr.com/
Champion CJ8 spark plug is for the crsftsman 3.0 edger/trimmer
.020
.03
.030