12-03-15, 07:31 PM
The fact that it runs well once started makes me think the sparks are ok.
It may be running rich on one (or more) carbs, if one's flooding a bit that would explain the backfiring and why turning the fuel off helps.
Try checking the fuel levels in the carbs.
It may be running rich on one (or more) carbs, if one's flooding a bit that would explain the backfiring and why turning the fuel off helps.
Try checking the fuel levels in the carbs.