help identify

Discussion in 'RC General & Getting Started' started by JACK GROVE, Feb 6, 2004.

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  1. JACK GROVE

    JACK GROVE New Member

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    i have a os 21ex engine i can find nothing about this model it has os max on one side and ex on the other[?]
  2. dudex

    dudex Member

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    a picture might be useful.
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