Adding an OB w/bracket to a 20' Moopie

Discussion in 'Propulsion' started by kevinm, Apr 16, 2010.

  1. kevinm
    Joined: Apr 2010
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: NH

    kevinm New Member

    I’m considering a repower on a 66’ Bertram Moopie 20’. I promised myself I’d never own an outdrive however I like the hull. My question is, but not limited to;
    • Performance- I have modest speed expectations (low to mid 30’s mph). Will a 4-stroke 150hp get me there?
    • Trim-I’d like to have a boat that sits nicely on her lines. How will the leverage of moving that weight back affect the trim vs the current V8 sterndrive?
    • Looks-I think the Moopie is a good looking boat. Will I be bastardizing the boat by hanging an OB on a bracket off the back?
    • Reinforcing the transom-I understand this model was heavily build but should I be thinking a thick piece of Oak, SS backing plates, heavy FG mat?
    • Thoughts on the Moopie-Is this a hull worthy of the time and expense.

    Thanks in advance.
     
    kevinm, Apr 16, 2010
    #1
  2. Typhoon
    Joined: Mar 2009
    Posts: 125
    Likes: 8, Points: 0, Legacy Rep: 150
    Location: Australia

    Typhoon Senior Member

    I was once involved in hanging a pair of 150 V6 Mercurys off a 28ft Bertram runabout. It performed fantastcially, trimmed well and was an excellent sea boat after the conversion.
    Just make sure you use a well built pod or build one. The one on the Bertram was also made to serve as a boarding platform once in the water.
    The existing engine bay was turned into tankage and the old tank areas into huge storage areas. There was no downside to the conversion whatsoever.
    I say go ahead and do it, but I would use the lightest engine you can find, and 150 is as low as I'd go in horsepower..

    Regards, Andrew.
     
    Typhoon, Apr 17, 2010
    #2
  3. powerabout
    Joined: Nov 2007
    Posts: 2,944
    Likes: 67, Points: 48, Legacy Rep: 719
    Location: Melbourne/Singapore/Italy

    powerabout Senior Member

    Too bad you cant buy OMC sea drives they were perfect for that.
    I did a 25 Bertram in OZ with 1.6 Sea drives and it went as fast as the twin 170 stern drives.
    Another dealer did a 28 with 2.6 sea drives equally as good.
    There was tons of clever engineering in the sea drives...
     
    powerabout, May 14, 2010
    #3
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