replying to hillclimber, Sandor1 wrote:
Take a look at the bottom of the carburetor for something sticking out with a
wire attached. There is an electronic valve on the bottom which is supposed
to close to prevent gas from getting into the cylinders when the mower is not
running. That valve goes bad and after being open for 20 minutes or so,
closes. My mower had very similar symptoms, even and would frequently die
when on the side of a slope. By changing out that valve, the problems went
away.

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