By: Rons Sloane John Deere LA 115 – Bogs Down/Won’t Start – Free, Easy Fix, Maintenance August 17, 2020John Deere Riding Mower Repair Parker, CO John Deere mower would run for a little bit and then bog down. Couldn’t get it to start back up. I thought it was a fuel line, fuel filter, or a carburetor problem. It wasn’t. But it was a free easy fix. It was an issue with the gas cap!