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  1. #1
    RC poster
    Join Date
    Mar 2018

    3.3 ascending idle issue

    just installed a new in box 3.3 (#5407). motor started and idled for a few seconds then began to slowly increase rpm. Before i could get it shut down the clutch had engaged and the wheels were spinning pretty good. Did i ruin motor by overspeeding during break in? The throttle position never changed. Factory carb settings were not altered. Anyone have experience with this?

  2. #2
    Marshal Double G's Avatar
    Join Date
    May 2008
    Lean LSN. Richen it 1/16 of a turn.

    Do your break-in process to a T.
    The Super Derecho

  3. #3
    RC Competitor
    Join Date
    Mar 2017
    Linkage not catching somewhere , check to see that carburator isn't lose at motor connect , and vacuum lines have no leaks , throttle slide boot could be bound up , easy stuff to check

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