Stihler650
New Member
I recently picked up a David Bradley 917.60029 from an older guy that bought it and never used it. The saw is in good shape and doesn't appear to be missing anything other than the spark plug. He said it didn't have one when he bought it 30+ years ago. I did some searching and find it calls for Champion J8, which I bought and does not fit the cylinder. The spark plug thread diameter is too small. What spark plug should be in this saw?