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Because there is water in the fuel line. Drain the gas tank, fuel line and the carcuretor bowl. Then put new gas in it.

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Q: Why does your lawn mower backfire when it is shut off and what does one do about it?
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Why wont my Sears riding lawn mower shut off?

There could be many reasons why your Sears riding lawn mower won' shut off. The key could be jammed for example.


Why does your lawn mower backfire when you shut it of?

When you turn it off the igniton (spark) to the plug stops as the engine rolls to a stop unburnt fuel collects in the muffler and is ignited by glowing bits of deposits.


How do you shut off the engine on a craftsman 6.75 MRS lawn mower?

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Lawn mower will not shut off?

The kill switch wire is broken or has come loose. If it is a push mower, look at the end of the throttle cable where it touches ground when the lever is in the OFF position. If it is a riding lawn mower, follow the wires from the ignition switch, you will find a disconnection someplace near ground (by the throttle cable bracket on my rider).


Why does your new lawn mower shut down?

Most new mowers have a cut off switch inside the oil filler tube that shuts it off when the oil gets to low.Seeing it is a new mower the oil will burn a little causing the shut off to activate,put some more oil in it and it should be ok.


How do you test a lawn mower voltage regulator that is off of the mower?

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How does the power take off system work on 1200 Massey Ferguson lawn mower?

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Will a stuck carburetor shut a lawn mower off during operation?

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Why does my Craftsman rotarty lawn mower start but then shut off right away?

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How do you get a riding lawn mower off blocks?

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Why does lawn mower turn off after turn on?

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