John Deere Z425 Surging Issues - A forum community dedicated to john deere tractor owners and enthusiasts. Come join the discussion about towing, ptoโs, reviews, attachments, modifications,. I have a john deere z425 that we got used last year. We were able to use it last summer several times and then it started surging. We have replaced the carb and the fuel filter. When dealing with mechanical problems related to the briggs and stratton twin cylinder intek ohv engine in your john deere z425, troubleshooting is essential to identify. It ran perfectly last week. Went to start it this week to mow and now it sputters, black smoke and backfires all when trying to give it gas. It will not run fast nor can i engage the. The governor is constantly surging. The problem goes away when choked as well as when blades are engaged. Seems like this is an air/fuel issue of some kind. Changing out the idler spring since i have the guarding removed and pulling fuel line to blow it out. I have a z425, second season mowing with it. Started surging when idling with the throttle in the mow position. The problem goes away when choked as well as when blades are engaged. Seems like this is an air/fuel issue of some kind. Changing out the idler spring since i have the guarding removed and pulling fuel line to blow it out. I have a z425, second season mowing with it. Started surging when idling with the throttle in the mow position. Seems not to do it when blades are engaged. The common problems associated with john deere z425 lawn mowers, including hydraulic issues, transmission issues, steering problems, carburetor problems, hard starts,.
A forum community dedicated to john deere tractor owners and enthusiasts. Come join the discussion about towing, ptoโs, reviews, attachments, modifications,. I have a john deere z425 that we got used last year. We were able to use it last summer several times and then it started surging. We have replaced the carb and the fuel filter. When dealing with mechanical problems related to the briggs and stratton twin cylinder intek ohv engine in your john deere z425, troubleshooting is essential to identify. It ran perfectly last week. Went to start it this week to mow and now it sputters, black smoke and backfires all when trying to give it gas. It will not run fast nor can i engage the. The governor is constantly surging. The problem goes away when choked as well as when blades are engaged. Seems like this is an air/fuel issue of some kind. Changing out the idler spring since i have the guarding removed and pulling fuel line to blow it out. I have a z425, second season mowing with it. Started surging when idling with the throttle in the mow position.