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  1. #1
    RC Competitor
    Join Date
    Apr 2012

    Trx 3.3 engine problems

    I am having trouble tuning my 3.3 because it seems to get leaner after a bit of running and I have already tested for a air leak but there is not one. So do any of you nitro gods know whats going on?

  2. #2
    Marshal Double G's Avatar
    Join Date
    May 2008
    It is natural for it to lean out as the fuel level gets low: what can compress: air or liquid? Tune at a half tank and when the engine is warm. Otherwise you'll have a good tune at a full tank and too lean at empty.
    The Super Derecho

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