I will assume a valve-in-block engine and the answer is an RJ19LM Champion or equivalent.
what is correct spark plug gap for aeriens 624E snowblower
Spark Plug gap is .025
.020
Bmr6a
0.65mm
http://www.toro.com/home/customercare/interactivemanuals.html Snowthrowers Single Stage Snowthrower TOC Maintenance Spark Plug Conditions Page down to Replacing a Spark Plug
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
I have the manual and the plug is CJ-8Y and the gap is .025"
Mine has original plug, it is a: Champion # CJ8Y
According to the manual, it is 0.030 Robert
Champion RDJ7Y is the correct number.
Mine has NGK BPMR4A