Tip & How-To about Miscellaneous

John Deere X300 Stalls

Does your X300 act like it has no fuel even though the tank is full? Does it run rough and stall out, but after waiting a minute it starts right up?
This machine has a vented gas cap. Take a look at that cap and you'll see a small hole in the top center. You may only notice a dot of dirt or something in that area. It may be that vent hole is plugged and not allowing air to enter the tank. A vacuum is formed and the engine gets starved for fuel.
A quick way to check this is to drive until it stalls. Immediately remove the gas cap. If you hear a hissing noise that's air going into the tank and an indicator that the vent is plugged.
Take a pin (I used a dental explorer tool) and poke through the vent hole to clean it out.
The alternative is to take the mower to the dealer for a couple hundred bucks.

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driving 60mph power drops as though out of gas. Coast 2-300 yds pump gas pedal van back to normal. Now at home it starts then stalls, will only run 5-10 seconds. New plugs&wires distributor cap and rotor. Cleaned and wire brushed all ground points. Fuel filter less than 1 yr old. Gas tank 3/4 full. I can hear the fuel pump when Ignition is turned on. Vacuum lines intact and secured. Air filter new. Air flo meter internal flap moves freely.


signs of a bad fuel pressure regulator. the vehicle runs rough, the engine will not start usually in the mornings. many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. black soot on plugs, blake smoke from tailpipe, running rough, stalling. you could have residue in fuel tank and need to change fuel filter again. have a very good day !!

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stalls when under load "driving"


Check the ignition module. My car would run fine until it came up to full temp and then run bad. I continued driving the car while trying to diagnose the problem. It got worse and then one day the car stalled as if it ran out of gas (still had plenty in the tank). I was able to coast it into a parking spot and called for a ride. Upon returning, I tried to start it, started right up and ran fine. On the way home it started acting up again (once it was up to temp). It turned out to be the ignition module.

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try a basic tune-up...plugs and filters

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