Machine is a 727 Ztrak with a Kawasaki FH680V 23 HP engine. After mowing a while and everything gets to operating temperature, the engine starts to misfire, especially when the mower loads up. If I back out of the uncut grass or disengage the blades, the misfiring/stumbling clears up. Load the engine up, it immediately starts misfiring again. I've put new plugs, fuel pump, filter, ran seafoam through it, all without success. It only has this problem when the engine gets warmed up. Otherwise it starts and runs fine. Someone suggested the ignition coils. I wouldn't think both would go bad at the same time. Then again, that's why I'm here.
Thanks,
Steve
Thanks,
Steve