My Homelite 2-stroke blower had been getting hard to start, especially a few minutes after I shut it down. Was thinking I might have flooded it, so I pulled the original plug out. It was a Torch (not surprised), but the threads looked like they had some damage, and they were blackened, almost like it's been oozing slightly. Ordered an NGK replacement, and thankfully the threads in the cylinder head weren't damaged. Started right up!