THIS IS WHAT I DID ANY HELP IS APPRECIATTED BOUGHT THE L100 BLOWED UP ,FRIEND OF MINE HAD A SHORT BLOCK BUT OLDER MOTOR THAN WAS ON IT 311777 MODEL ,I HAD TO MAKE A VACUUM LINE FOR THE FUEL PUMP WHICH I PUT IN TOP OF DIP STICK TUBE ,I WOULD ASSUME THE CARB OFF MY MACHINE SHOULD BE COMPATIBLE WITH THE OLDER ONE ? MOTOR FIRED RIGHT UP BUT THEN FLOODED OUT . REMOVED SPARK PLUG CYLINDER BLEW GAS OUT PUT NEW PLUG IN IT DOES THE SAME THING . HEAD WAS REBUILT AT MACHINE SHOP BEFORE I PUT IT TOGETHER ALL SUGGESTIONS ARE WELCOME THANKS