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Anonymous Posted on May 06, 2011

I have a murray 17.5 hp 42 inch cut riding lawn mower. The engine is a 17.5 Tecumseh o/h valve. It seems it is not getting fire. I replaced the spark plug and tried holding the plug close to the engine frame and nothing. I checked the fuse and it is good. what else can i try? The murray model is # 425610X99B.

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Dan Schilz

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  • Expert 47 Answers
  • Posted on Jun 08, 2011
 Dan Schilz
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Had the same problem and it turned out to be a fried coil. You need to remove the engine top cowling to get to this. On mine, a mouse had built a nest all around my coil (Very common) and, come summer when I used the mower, it toasted the coil. Just a thought. Good luck!

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Roy Cagle

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  • Briggs & Str... Master 1,545 Answers
  • Posted on May 06, 2011
Roy Cagle
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You could remove the top engine cover and try checking the "air-gap"; that is the distance between the ignition module legs and the magnets in the flywheel. A good reading is around .010" or so. That is about the thickness of a standard sized business card, which is commonly used as a feeler gauge in this situation because of the magnets.

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  • 2 more comments 
  • Roy Cagle
    Roy Cagle May 07, 2011

    Please try that as you said and post back with the result. I will see your comment and continue to help.

  • Anonymous May 08, 2011

    I had to go out of town Saturday so I am a little backed up so it may be a day or two until I can get to it. I am very grateful for the help and please believe that I am interested in it and not trying to shierk it off. Sometimes there is just not enough of me to go around.

  • Roy Cagle
    Roy Cagle May 08, 2011

    Not a problem my friend, I know the feeling myself!

  • Anonymous May 08, 2011

    Thanks for understanding.

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