Was pulling a large load on low gear, Suzuki engine got really warm. I would stop and idle, hoping the fan would cool it. Than after a few minutes turn the machine off for a few minutes and start going with no issues. When the machine got really warm again, I would try let it cool down again. Everything work out good. Loaded my machine on trailer. I Got home. I tried starting my machine but soon as it fires it backfires from the the filter area and stalls out, when I do get it to start for a minute or so, doesn't idle properly, I have to throttle it a touch, and backfire from intake and stalls out again. Bad spark plug or did I mess up my machine from over heating it?