Hi all,
This is my first time using the forum. I have a Briggs and Stratton 21hp single cylinder OHV engine on my craftsman mower. The engine will start and idles fairly smooth. When I advance the throttle it starts severely backfiring with black smoke out the exhaust. When I throttle back to idle it runs smooth again. Any ideas would be great. Thanks...
This is my first time using the forum. I have a Briggs and Stratton 21hp single cylinder OHV engine on my craftsman mower. The engine will start and idles fairly smooth. When I advance the throttle it starts severely backfiring with black smoke out the exhaust. When I throttle back to idle it runs smooth again. Any ideas would be great. Thanks...