Question about Garden
The mower surges when the engine runs and fuel is getting into the oil i have clean the fuel tank replace the fuel lines fuel pump spark plugs air filter new carbutor check the shaft key on the flywheel too and the mower still surges while it runs
If fuel is getting into the oil, I would say the needle and seat or float in carb is not stopping fuel flow. I would check carb again and adjust float level. Change or install an inline fuel filter too. Surging is almost always carb related. If problem persists after checking carb again, check governor springs. If they have been bent at all after removing carb, they can be bad. If you replace new governor springs and surging still exists, try doing a static setting on carb/governor. If your unit has an oil/centrifugal governor, move governor arm in the direction that opens throttle valve in carb all the way, hold in place, loosen nut on governor arm and grab small tang that goes inside engine and turn in the same direction you moved governor arm, rotate this until it stops, hold in place and tighten nut on bottom of governor arm. This is called a static/factory setting. Make sure throttle cable is in high position when doing this. Let me know if you have any questions. Good luck!
Posted on Oct 22, 2013
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Posted on Jan 02, 2017
I have a john deere 420 rider. It would surge at a higher speed. It is a hydrostatic and there were 2 bolts on the transmission that were loose. now it runs beautifully smooth,
Posted on May 04, 2009
SOURCE: john deere 425 mower won't start
The ignition switch module is likely to be the problem,they seem to quit for no good reason.The safety relays and fuses are built into the board that comes with the switch and will most likely fix your problem.
Posted on Apr 25, 2010
I have a 115 john deere tractor that runs but the engine will not run smooth I've put a new fuel cap on it a new pump and clean out the carb.
Posted on Aug 18, 2010
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