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40 cc model ms4016pav will run for about five minutes then die. After that it will start and die, start and die.

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  • dontbother10
    dontbother10 May 11, 2010

    Did you replace the fuel lines? Reply below please.

  • dontbother10
    dontbother10 May 11, 2010

    Does it run for a few seconds only after the primer is activated?

  • gtsam May 11, 2010

    Nothing done yet. just didn't know where to begin

  • gtsam May 11, 2010

    After the initial run it will start and run a little bit but will not rev up

  • gtsam May 11, 2010

    After the initial run it will start and run a little bit but will not rev up



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The problem is likely that the saw has been overheated. What happens now is that the engine loses compression because when it heats up again, the cylinder goes out of round. After cooling off compression returns to normal.

The block has probably been overheated which means the engine is junk.

Posted on Jan 16, 2013

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Check the fuel filter, air cleaner, and muffler for plugging. Check the fuel lines for decay or other damage. Does the primer bulb fill with fuel after several pumps? Make sure the carburetor fasteners are tight. Hope this helps!

Posted on Jul 23, 2010


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