Weed eater engine conversion

Discussion in 'DIY Marinizing' started by Ward, Jun 2, 2003.

  1. pistnbroke
    Joined: Jan 2009
    Posts: 1,405
    Likes: 33, Points: 48, Legacy Rep: 404
    Location: Noosa.Australia where god kissed the earth.

    pistnbroke I try

    Change the prop on that trolling motor for a model aeroplane one and a spinner and it will go faster with less current ...8x8 or 10x8 ..I have a 24v 86 lb unit run on 12v on my 15 ft boat ( 40 kg bare)...4 kts
     
  2. HelicopterJohn
    Joined: May 2012
    Posts: 80
    Likes: 3, Points: 8, Legacy Rep: 47
    Location: Seffner, Florida

    HelicopterJohn HelicopterJohn

    Hi,

    Do you have any video of this? I would love to see it on the water in action.;)

    John
     
  3. pistnbroke
    Joined: Jan 2009
    Posts: 1,405
    Likes: 33, Points: 48, Legacy Rep: 404
    Location: Noosa.Australia where god kissed the earth.

    pistnbroke I try

    At about 1000 rpm in water these props exhibit similar efficiency characteristics to 15000 rpm in air...if you study the thread efficient electric boat you will get the idea ...you must run the troller in reverse as theyare all left handed unless you go prop first.
     
  4. hoytedow
    Joined: Sep 2009
    Posts: 5,402
    Likes: 193, Points: 73, Legacy Rep: 2489
    Location: North of Cuba

    hoytedow Wood Butcher

    Those props are available in left or right hand version. Ask at the hobby shop for a pusher prop. Post 604 this thread shows the one I used.
     
  5. pistnbroke
    Joined: Jan 2009
    Posts: 1,405
    Likes: 33, Points: 48, Legacy Rep: 404
    Location: Noosa.Australia where god kissed the earth.

    pistnbroke I try

    Thanks for telling me how to suck eggs ..less choice of pitch and diameter in pushers..what model shop its all gone on the internet ..ebay
     
  6. hoytedow
    Joined: Sep 2009
    Posts: 5,402
    Likes: 193, Points: 73, Legacy Rep: 2489
    Location: North of Cuba

    hoytedow Wood Butcher


  7. Thin water
    Joined: Aug 2005
    Posts: 100
    Likes: 2, Points: 0, Legacy Rep: 26
    Location: Central Florida

    Thin water Senior Member

    Here is a stand up paddle board that uses a "Jet" powered by a Honda GX35 4 stroke weed wacker style motor.

    Powering it with an electric would be a good option. The impeller should have been trimmed down more before making the videos because it only got to about 60% of the engines max RPM.

    I made the units for the inventor at my machine shop. He got six patents on the system and wants to sell them to any one interested. I have no financial interest in his company or future proceeds of any sale.

    It is USCG approved.

    https://youtu.be/RtmuzG2vGR8
     
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