Ok .. XTM 247 backplate #14827 / Ofna roto backplate 50011 When you pull the pullstart, watch for the ball point pen type spring. It goes back in the shaft when you do the conversion. You pull the pull start, the SH backplate. Then the xtm plate goes on, put the spring in the shaft and then the roto plate. I am PM'g a source for the parts .. they are fast on shp'g. Let me know if a prob. If you don't have a roto start, but have a cordless drill, just make or buy the start shaft .. save ya a few bux. Keep the drill clutch setting on the low side.