Googled a bit and I am unable to find the answer. Just picked up a replacement plug for my old reliable craftsman 18" 42cc saw, had it apart for new spring isolators for the handle as mine finally vibrated themselves into several pieces and decided to do a basic tuneup and clenaing. I spritzed the carb with some gumout, put in a new air filter and dropped in the new plug. Got it all back together and of course now it won't fire. I got it to stumble for a second on the first start attempt, but beyond that it doesn't wanna go. I do not know the correct gap so I figured I'd check here. I beleive its basically a Poulan 42cc saw with a green craftsman case on it. Any thoughts?