I had a 2185, exact same problem. A brand new carb was my only answer. Never had another running problem after I put it on. Yeah the carb is quite expensive, but was worth it getting the mower to run correctly. Before replacing the carb, I did check and replace all fuel line, fuel pump and anything else that could have been a culprit. If I am not mistaken there is an electronic solenoid on those carbs that goes bad and messes with the fuel delivery.
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DWayne
1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck
10" moldboard plow
2016 XT1 42" deck 18HP
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