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Riding Mower Backfires

Backfiring back fires

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Suonds like you have a timeing problum could be cupple of thangs # 1 could be you have a bad keyway in your flywheel or your fly wheel is cracked that is what i would check

Posted on Mar 18, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: mower backfires and loss of power

i would also check fuel flow. pull the gas line from the carb and see if gas flows out at a good rate (into a metal can of course) or if it trickles out. if the latter, then gas tank either has junk at the bottom preventing the gas from flowing or the vent hole (usually on the gas cap) is plugged.

i have also had my carb float bowl rust out on me, but that took 10 years.

Posted on Jan 29, 2009

  • 1 Answer

SOURCE: gas in the oil in my craftsman 17.5 riding mower

You have a bad antibackfire valve. It is located on carburator below the fuel bowl. You can replace it, or as I advise others, install an inline shutoff valve. Turn the fuel valve on to start it, then turn it off when you shut the engine down.

Posted on Mar 24, 2009

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SOURCE: my riding mower backfires when i turn off the key.

before you turn off the key pull the throttle down to idle and wait a few seconds give the gas a chance to burn out of the cylinder

Posted on Aug 23, 2009

  • 40 Answers

SOURCE: My craftsman 15.5HP kohler riding mower turns over

Try cleaning or better yet, replacing the spark plug. Depending on age and how your tractor was maintained, there are other possible causes.

  • Gummed up fuel system
  • dirty fuel filter
  • defective or misaligned armature/magneto (part that causes your plug to spark, igniting the air/fuel mixture, thus starting the engine)
  • throttle linkage/cable problems
  • low oil level. Some Kohler engines use a low oil shut down sensor which won't allow the engine to run or start to avoid internal damage.
  • Mechanical engine problems
I hope you find this solution helpful. Please rate it thanks for using Fixya!

Posted on Nov 05, 2009

nova2nv
  • 197 Answers

SOURCE: John Deer L110 with Kohler 17.5hp backfires wont start

This model is known for shearing the flywheel key.

Posted on Nov 14, 2009

Testimonial: "Just as you said - flywheel key had sheard, an easy fix thanks very much."

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The most common reasons any motor backfires are timing being out of adjustment or dirty spark plugs, in this case a dirty plug. Carbon deposits cling to the electrode, effectively changing the gap of the plug, or glowing long enough after the actual firing to cause another firing in between the normal firing, (back fire). I'd lean towards a good spark plug cleaning or just a new plug.

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