Why does my John Deere mower motor stumble?
Just a standard 17.5 E100. Bought it with 5 hrs. on it. Since day 1 after about 15 mins. it starts to misfire and stumble. Changed plug twice. Only ever use fresh 87 gas. Changed fuel filter. Tried Tru Fuel. Seemed to help but still. It's weird.
Sometimes it never does it but more often than not it does.
- champerLv 71 month agoFavourite answer
Try checking the fuel tank vent. If this is obstructed it can lead to a partial vacuum forming in the tank which will restrict the flow of fuel. Sometimes it takes a while for sufficient vacuum to form to do this, then after the engine has stopped enough air manages to seep in to let it go on again for a while.
(The vent is often simply a small hole in the fuel cap, it only takes a little dirt to bung this up.}
- 1 month ago
Sounds like it's a little rich on mixture, but I am unfamiliar with that type of carb.
- pit bulls biteLv 71 month ago
- thebax2006Lv 71 month ago
Take the carb bowl off and clean out the bowl and jets.
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- iammclaneLv 71 month ago
Check the air filter. Either clean or replace.