Same Problem Different Fix
My friend the Argo Dealer was working on a customers 8x8 Conquest with the 20 hp. Kaw water cooled engine, it would backfire through the carb under load. Idling was fine. It would even backfire at idle if you rev'd the throttle up. I said it must be a sticking intake valve, so he tried dumping some carb cleaner/tune up stuff down the carb, didn't work.
Next step was going to be removing the valve cover and have a look, when I said hey try a new plug in that cylinder, BINGO problem gone. Put a new plug in the other cylinder and tried it under load, no more backfiring. Cheap fix this time.
My friend the Argo Dealer was working on a customers 8x8 Conquest with the 20 hp. Kaw water cooled engine, it would backfire through the carb under load. Idling was fine. It would even backfire at idle if you rev'd the throttle up. I said it must be a sticking intake valve, so he tried dumping some carb cleaner/tune up stuff down the carb, didn't work.
Next step was going to be removing the valve cover and have a look, when I said hey try a new plug in that cylinder, BINGO problem gone. Put a new plug in the other cylinder and tried it under load, no more backfiring. Cheap fix this time.
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