Backfiring
Backfiring is a common problem with gas carts and most times can be corrected with adjustments on carb, timing and accelerator.
Today's gas has bio-fuel that leaves a residue in the carb and could build up to a point that may also result in backfires.
So called carb rebuilding is accomplished by professionals by removing the carb dismantling it and removing all seals and gaskets. The metal parts are soaked overnight in a thick acid solution, rinsed and then reassembled. That process removes all of the residue from the unit and should restore it back to normal. This process is simple for professionals and not expensive.
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