anywhere between 16 and 18 on a spark plug gauge should work fine.
0.020"
I think it is 0.030".
Spark plug gap should be .025 http://store.chainsawr.com/
0.020 in or 0.50mm
.025 inch per the manual.
on most trimmers the gap is about 25 thousands !!
0.030"
The owners manual states that the proper plug gap is .020"
.030"
.03
The gap is 0.030 in. The plug is Champion RJ19LM. The torque is 7-15 ft.lb
According to the manual, it is 0.030 Robert