Oldwrencher85
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- Jul 27, 2022
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I have aToro , 42-inch deck Engine : Kohler 7000 series, KT 725, 22 hp.
Serial # 4715806043 SPEC PS KT725 3031 Build date: 6-7-2017. It has the Walbro carb with the Smart Choke system. I bought it from the neighbor, it wouldn't start took the carb soaked it in carb cleaner and blew it out with compressed air. It started right up ran fine. This year, after running for a while it started missing and blowing smoke. After it cooling down it started right up and seemed to be ok, Then same thing again. I took the carb off again, it appeared clean and blew it out again. It is back firing thru the carb, fouling the air filter and appears to be on only one cylinder, since the frame of the mower is black with soot on one side of the muffler. I put on a new ignition module on the suspected side, gaped it at .010 and no change even with the choke blocked fully open. I took the new module and spark plug from the sooty side and switched it to the other cylinder, no change. The gas is fresh and non ethanol. What's next? Must be a mechanical problem ?
Serial # 4715806043 SPEC PS KT725 3031 Build date: 6-7-2017. It has the Walbro carb with the Smart Choke system. I bought it from the neighbor, it wouldn't start took the carb soaked it in carb cleaner and blew it out with compressed air. It started right up ran fine. This year, after running for a while it started missing and blowing smoke. After it cooling down it started right up and seemed to be ok, Then same thing again. I took the carb off again, it appeared clean and blew it out again. It is back firing thru the carb, fouling the air filter and appears to be on only one cylinder, since the frame of the mower is black with soot on one side of the muffler. I put on a new ignition module on the suspected side, gaped it at .010 and no change even with the choke blocked fully open. I took the new module and spark plug from the sooty side and switched it to the other cylinder, no change. The gas is fresh and non ethanol. What's next? Must be a mechanical problem ?