Some engines are finicky about using
Stabil. My Honda mini tiller hates that stuff, and one of the Huskee mowers I had in the past with a B & S engine didn't like it at all either. I've switched over to Seafoam, and haven't had near the problems. Most of the time, I'll deliberately run my equipment out of gas. Then pull the maintenance for changing oil, filters, sharpening blades, ...