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  1. #1
    Registered
    Join Date
    Oct 2000
    Location
    Lake Travis, TX
    Posts
    44

    boat getting "loose" at speed...

    I moved recently and now that I'm boating on a smooth lake with room to run fast and straight instead of a rough ocean, I've run into a new boat handling phenomenon.

    The boat is a heavy old 1970's Cigarette 36, weighing 11,000+ and it has a 9-1/2' beam, Hydromotive Q-IV's turning inward on TRS drives, and a pair of 600 hp BBC's. It's got a single sidewinder stabilizer at the moment but otherwise standard power steering.

    Around 65mph on gps the boat starts to feel likes it is very light and it could walk side-to-side at any instant. It will pull past this speed by a few mph but I always end up backing off to get it feeling solid again. Trim is usually ~2 out from straight on the indicators (4 out from fully tucked under).

    Is it possible to drive through this and learn the handling?

    Or does every given hull and setup/weight have a speed where it gets loose - with this being such an old, heavy and wide boat maybe I've reach what is my top safe speed?

    Other comments?

  2. #2
    Registered
    My Boats:
    '77 Martini 7 Meter
    Join Date
    Feb 2002
    Location
    Honeoye, NY
    Posts
    763

    Re: boat getting "loose" at speed...

    I just can't imagine that much boat getting that "loose" at 65 mph. Seems to me that you MUST have steering or hull issues. --- Jer

  3. #3
    Gold Member Gold Member Dave M's Avatar
    My Boats:
    2006 30 Superboat
    Join Date
    Oct 2000
    Location
    LaPlata, MD, USA
    Posts
    4,638

    Re: boat getting "loose" at speed...

    Quote Originally Posted by jpclear
    I just can't imagine that much boat getting that "loose" at 65 mph. Seems to me that you MUST have steering or hull issues. --- Jer
    I agree. Is your steering as old as the boat? Get a better quality steering system. I don't think those sidewinder stabilizers are adequate for big heavy boat.

  4. #4
    Registered
    Join Date
    Oct 2000
    Location
    Lake Travis, TX
    Posts
    44

    Re: boat getting "loose" at speed...

    Steering - good place to start. I didn't really know if it wasn't just normal. First I'll get the other sidewinder back on and see if that helps, otherwise look at external steering. Thanks for your replies!


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