Mounting height of outboard motor

Discussion in 'Powerboats' started by finfinder951, May 17, 2004.

  1. finfinder951
    Joined: May 2004
    Posts: 1
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    Location: HOUSTON, TEXAS

    finfinder951 New Member

    I have recently purchased a used 22 ft. fiberglass center console, semi-v hull, 200 HP Yamaha outboard. The previous owner removed the hydraulic jack plate from the motor before I purchased the boat. The motor does have power trim installed. Hull weight is ~1,900 lbs.

    Question: What is the correct height relationship between the keel at the transom and the anti-cavitation plate on the lower unit? I have been told that, when the boat is on plane full throttle, the plate should be at the surface of the water, not below. I have only begun to research this and I've already discovered that there are a lot of mis-conceptions regarding boat rigging.
     
  2. nevd
    Joined: Nov 2003
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    Location: Australia

    nevd Junior Member

    Mounting height of outboard

    Hello Fishfinder,

    I agree, motor height is not an area well covered by the industry. Have a look at this recent thread called "Outboard Bracket Help" as it will probably answer your questions. http://boatdesign.net/forums/showthread.php?t=3662

    Regards,

    nevd
     
  3. Thunderhead19
    Joined: Sep 2003
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    Location: British Columbia, Canada

    Thunderhead19 Senior Member

    by and large long shaft motors regure 20" between the top of the bracket or cut-out and the bottom panel of the boat. extra long shafts require 25"
    regular shaft motors are 15...you get the picture.
     
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