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  1. #1
    RC poster
    Join Date
    Jan 2015
    Nashville, TN

    Unhappy Megatech M16 / Q 1.6 crankshaft sheared off

    Well, today I was out bashing in the snow with one of my 4910s and right at the end of my 2nd tank, POP!
    Running 20% Traxxas top fuel.

    Amazingly, nothing seems damaged.
    The bearings are fine, no grind, smooth and tight. Has plenty of compression. I broke this motor in 7 years ago using the same methods for the 2.5, but then shelved it once I got a new 2.5. Built this 4910 last week out of spare parts so I used this motor. It sat for a loooong time, but it was in a sealed plastic bag and soaked in after run oil.
    I have been looking for another crank, cant seem to find one.

    Has anyone had the crank shear off like this before on any motor?
    This engine has less than 2 gallons on it, and I just recently started tuning it for more performance. It was cold today, so the motor never got above 150F.

    Looks like the old 15CV is going back on for now; it has over 6 gallons of 20% on it.

  2. #2
    RC Turnbuckle Jr. JerrysMaxx's Avatar
    Join Date
    Jul 2014
    Sounds like a question I would be asking the manufacturer.
    T/SportMax/Slayer Pro/Bandit

  3. #3
    Marshal Double G's Avatar
    Join Date
    May 2008
    Agreed .
    The Super Derecho

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