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Thank you for your reply. I forgot to mention that it also seems to stutter more when I am on an incline with the left side lower than the right. Do you think that might indicate more of a fuel flow issue? I am pretty meticulous about keeping inlets clean of any debris so I know that number...

I have a John Deere Z425 zero turn mower with a Briggs & Stratton engine. The engine is model: 44R677, type: 0015G1, code: 140120YG. The mower runs perfectly fine for about 15 minutes then will sporadically begin missing/stuttering. It never dies but the longer I mow the more frequent the...