dragontoy22r
+1y
Flame thrower kits use their own relay, coil and spark plug. They don't use anything off the motor, just the exhaust gases. A hole is drilled and a nut welded to the exhaust piping just before the tip. A spark plug is placed in and a spark plug wire goes from that to a coil. A relayed trigger switch activates the spark. He said he checked the spark and it was fine, btw.