Weed eater engine conversion

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

  1. *Ender*
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    *Ender* Junior Member

    See post #282
     
  2. hoytedow
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    hoytedow Wood Butcher

    Post #406 on page 28 shows a very simple configuration.
     
  3. docott
    Joined: Feb 2012
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    docott Junior Member

    Ender, do you have a link/source for the housing you mentioned, Honda clutch assembly #22260-VL3-D41? I am, of course, doing my own search as well, but thought you might have a source. Thanks.

    Spence
     
  4. docott
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    docott Junior Member

    thank you, Ender and Hoytedow.
     
  5. docott
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    docott Junior Member

  6. Erich_870
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    Erich_870 Junior Member

    Please post up if you order it. I was looking at all the parts that are supposed to be included in that assembly and I'm shocked at the low price! It's over a 50% savings compared to buying each piece separately.

    Erich
     
  7. docott
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    docott Junior Member

    Will do. I, too, was surprised by the low cost. You're right- other similar parts seem to cost about twice that.
     
  8. tom kane
    Joined: Nov 2003
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    tom kane Senior Member

    I have made small propulsion drives from several conversions but would a post hole borer not make an easy conversion and be robust and push a heavy boat well.
    The attachment shows the borer shaft turned end for end and stripped a bit.
    I did experiment with an auger drive and was happy with the end results.
    Some two stroke motors can have the ignition turned to give running in both rotations.
     

    Attached Files:

  9. hoytedow
    Joined: Sep 2009
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    hoytedow Wood Butcher

    I think 43 cc would work very well. I wish the airboat motor I threw together had been 43 cc. It would have performed better than the 25 cc I used. See page 41 this thread.
     
  10. tom kane
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    tom kane Senior Member

    The price is NZ dollar an equivalent outboard would be thousands of $
     
  11. Mark Wo
    Joined: Dec 2007
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    Mark Wo Senior Member

    There is a company in Iowa that is doing just what you propose (using an auger bit as the prop). They shave it down just as you intend. People who own one seem to be fairly pleased with the results. They use a bigger engine than you propose (I believe they start at 6.5hp). Can't recall the company name but I believe it starts with an "S". Maybe try "scavenger"

    Mark
     
  12. pistnbroke
    Joined: Jan 2009
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    Location: Noosa.Australia where god kissed the earth.

    pistnbroke I try

    45 cc does not equal 6.5 HP and the idea is that the auger screws its way through the mud providing propulsion ..you should always consider with these projects if a mouse can power your boat even when its wheel is geared down....
     
  13. tom kane
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    tom kane Senior Member

    The advantages I found with the auger prop was that it would give thrust in sand mud weeds and even with a lot of weeds around it it still managed to push.Having no slashing propeller meant that any damage was minimal and the drive just slid over rocks and logs. Speed would depend on the rotation speed of the auger and most post hole borers run slow. I had 30 HP on one of my auger drive with a 3 speed gearbox. I would just love to have it back now.
     
  14. Mark Wo
    Joined: Dec 2007
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    Mark Wo Senior Member

    Could work

    I have an ice auger that will drill hole after hole until the motor would run out of gas. It is really geared down however and I don't think it would spin fast enough to propel a boat. I wonder if the motor was geared differently if it would go through mud like you are trying to do.

    I'm not clear Tom, did you already build one of these with the 45 cc motor or are you going to build one?

    Mark W
     

  15. tom kane
    Joined: Nov 2003
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    tom kane Senior Member

    I have not converted a post hole borer but I did use an auger (a progressive pitch from butter packing machine ) on a boat with a Ford 10 inboard and 3 speed gearbox. The pitch of the auger would determine the amount of water and the speed (pretty slow without a gearbox with high ratio) Great in mud and sand and has a lot of prop walk. The screw was not steerable just ahead and a rudder to steer which was not very effective at times. I wish I still had it now.
     
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