Building a boat around 18hp.

Discussion in 'Boat Design' started by Deadeye, Jan 10, 2012.

  1. Yobarnacle
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    Yobarnacle Senior Member holding true course

    Then I'm probably in error about the motor. I won't say it was a 20hp rude anymore.
    Now I feel foolish saying it for all these years.
    thanks for straightening me out.
     
  2. Mr Efficiency
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    Mr Efficiency Senior Member

    A man is rarely to be found, who is grateful to have his error pointed out, I salute you ! :p
     
  3. Frosty

    Frosty Previous Member

    I am 100KG I could not ski behind a 20HP. I have ski'd behind an 80 and it was not a good pull. When I was young in my late 20's I would do barefoot demonstrations from the beach, I had a 17foot boat with 200HP and later a 225HP It used a 17 pitch for this trick and full power was used to max RPM.

    In this mode we would also pull 5 skiers for a 5 man pyramid.
     
  4. Mr Efficiency
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    Mr Efficiency Senior Member

    As has been pointed out, the old Johnno 33hp was called a "SkiTwin". Obviously the boat type and load ( ideally no more than the driver and observer if not a big engine) affects how much surplus power is available to pull a skier.
     
  5. Yobarnacle
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    Yobarnacle Senior Member holding true course

    Only my buddy was in the boat. I remember it was a metal skiff. I'm sorry I erred on the motor. I can only remember what I believed untill very recently, was the motor type and hp. Obviously that wasn't correct. I try not to say things that aren't true. I appreciate learning the truth, because no one I know would willingly persist in error. I wouldn't!
     
  6. waikikin
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    waikikin Senior Member

    For fun behind low power, free-boarding is cool, I've got use of a mates rib with a 18 hp Tohatsu & it gets my kids up on a board, boogie board & kneeboard, I even got up at 86kg but bog it down in turns. All the best from Jeff.
     
  7. Yobarnacle
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    Yobarnacle Senior Member holding true course

    The boat resembled this one, but I don't know the make
     

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  8. hoytedow
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    hoytedow Carbon Based Life Form

    Can too if boat is light and occupants inside boat are too. I did it with 15 hp(skier probably 130#) with 2 occupants in boat combined weight boat motor and occupants not counting skier about 550#. With 5 more hp I could easily have pulled a 200# skier (slowly).
     
  9. Submarine Tom

    Submarine Tom Previous Member

    Oh ya, well once when I was ten, I had a...

    Oh, never mind.

    -Tom
     
  10. hoytedow
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    hoytedow Carbon Based Life Form

    It was probably a 25hp if it was an Evinrude. That could easily do the work in an open boat such as you posted.

    http://www.marineengine.com/manuals/evinrude/#e20hp
     
  11. Yobarnacle
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    Yobarnacle Senior Member holding true course

    Maybe...and that might explain why I seemed to recall twenty. Twenty five could get truncated to twenty in my head but, I don't know what it was. My memory proved fallible so I'll eat a little crow, apologize, and go on.
     
  12. hoytedow
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    hoytedow Carbon Based Life Form

    If the motor was old it could have been a twenty. Evinrude did make them. See link.
     
  13. Submarine Tom

    Submarine Tom Previous Member

    There you go Yoby, maybe you're not loosing your marbles after all!!

    But, as I recall, when I was ten...

    -Tom
     
  14. Yobarnacle
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    Yobarnacle Senior Member holding true course

    I saw that they made a 20 back in the 30s. But I really don't have a mental picture recall of the motor. Just recall "thinking" 20 hp a long time. The boat resembled the one I posted, riveted metal with tumble home on the stern. About 14 ft long I'd guess.
    The steering wheel wasn't in a dash like the post. There was another thwart there in the center and the steering wheel mounted in middle of thwart. Wheel was big and horizontal. It's axle verticle penetrating thwart. I remember that much.
     

  15. Yobarnacle
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    Yobarnacle Senior Member holding true course

    Okay Tom, I'll bite... :)....What happened when you were 10?
     
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