Mine has a cj8 in it, not 100% sure that og part though or what someone just put in it. works fine with it
Spark Plug gap is .025
0.020 in or 0.50mm
.030
Champion RDJ7Y is the correct number.
.030 Champion RJ19LM
.030
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.
Mine has original plug, it is a: Champion # CJ8Y
Spray some ether in the carb. If it fires, it has spark, but not getting fuel. start there.
0.024 - 0.028"
.030"
.030"