I have a craftsman 15.5hp b/s motor and it keeps back firing can any body help with this problem do I have to set the gap on the spark plug if so what is the gap also how dfo I find the right belts for my mower thank you palacios46

Palacios, you are just not having very good luck are you. will the engine start?

Not sure about the back fire part,but I found replacement belts on-line and e-bay for my Lt1000 rider.