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  1. #1
    Join Date
    Mar 2011
    Location
    Albuquerque
    Posts
    65

    Default Possible computer issue on Supra Launch 21V

    My problem originated with what sounded like a starter staying engaged when in neutral. This problem would not occur when engine first started in neutral but when we returned to neutral a second time (kind of a grinding sound). From there the starter failed to engage at all. The boat is presently at a Mastercraft dealer (only dealer even close). I am not sure if I have much faith in them. They started with engine diagnosis, pulling plugs, spinning engine, from there they did diagnosis on electrical, then replaced starter, still no engagement, went back through relays and cannot find any issues. They now want to replace the computer. Anything else they can be missing before having them order a replacement computer?

    Thank you.
    2006 Supra Launch 21V

  2. #2
    Join Date
    Mar 2003
    Location
    Springfield Missouri
    Posts
    3,392

    Default

    Something intermittent anymore needs some sound recorded. Were the starter teeth torn up? For safety reasons, I wouldn't expect the function of the starter to be tied into the computer.
    Last edited by zabooda; 06-02-2020 at 12:34 PM.
    1998 Mobius
    310 HP PCM
    SOLD

  3. #3
    Join Date
    Mar 2011
    Location
    Albuquerque
    Posts
    65

    Default

    I forgot to mention that after the dealer pulled the starter they said it appeared to have water damage.
    2006 Supra Launch 21V

  4. #4
    Join Date
    Mar 2011
    Location
    Albuquerque
    Posts
    65

    Default

    Sorry, not the starter, but the computer had water damage.
    2006 Supra Launch 21V

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