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  1. #1

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    TT 40 Muffler Rebuild

    The Thunder Tiger Pro 40 muffler comes apart during use. One method to fix the muffler is to replace the stock muffler bolt and J-B Weld the unit together.

    I used an existing muffler that had to be re-glued. Begin by taking it apart and cleaning parts with Brake Cleaner.
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  2. #2

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    RE: TT 40 Muffler Rebuild

    The stock muffler bolt was replaced with a 4-40 all thread bolt.
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  3. #3

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    RE: TT 40 Muffler Rebuild

    Mix a small amount of J-B Weld and glue parts back together.

    The all thread bolt should be tightened relatively tight.

    I installed the muffler back on the airplane and set it out of the way to dry.

    This process took about 1/2 hour and eliminates most muffler issues.
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  4. #4
    vicman's Avatar
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    RE: TT 40 Muffler Rebuild

    Yep, thats what I do. Only I use 6-32 rod. Nice thread.
    A guy who used to live on this site and now is rarely here due to the "upgrade".
    Most likely fading away till the My Forums is fixed. Too bad.

  5. #5

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    RE: TT 40 Muffler Rebuild

    I never use the stock muffler bolt for even one flight. I replace it with a 6/32 threaded rod with lock nuts on both ends. I don't JB weld anything. Never had a problem after that.

    Denis
    I never met an engine I didn\'\'t like.
    Of the things I\'\'ve lost I miss my mind the most.

  6. #6
    GSJames's Avatar
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    RE: TT 40 Muffler Rebuild

    I even go so far as to put (2) 2-56 x 3/8 socket head sheet metal screws to fasten the front and back halves together. THEN I put safety wire around the whole thing so that if it STILL breaks, at least the back half will be hanging on so that I can use it again instead of losing it in the grass.
    Gary James
    AMA CD 68845, NMPRA 15I, RCCA #908


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