STIHL FS420 Brush saw conversion too outboard

Discussion in 'DIY Marinizing' started by dock83, Jun 25, 2010.

  1. dock83
    Joined: May 2010
    Posts: 10
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    Location: Newfoundland Canada

    dock83 Junior Member

    Here are some pic of my out board about 2.5hp I think. Works great. Some of the parts I used are a head off of a dewalt angle grinder for my gearing and I also had too source a seal too keep it water tight thank you all balls racing. I also adapted a lawn mower tank because the orginal was too small. The clamps came off of an eveinrude and other than that the rest is orginal.

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    http://i824.photobucket.com/albums/zz163/dock83/100_1524.jpg
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  2. Erich_870
    Joined: Feb 2009
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    Location: Juneau, Alaska

    Erich_870 Junior Member

    Nicely done! Can you share any more info on how you adaptable the angle grinder to be your gearing?

    Erich
     
  3. LyndonJ
    Joined: May 2008
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    Location: Australia

    LyndonJ Senior Member

    Great , thanks for sharing

    And while your at it, how you sealed the seal to the housing. And how you adapted the prop to the angle grinder shaft.

    Please....
     
  4. dock83
    Joined: May 2010
    Posts: 10
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    Location: Newfoundland Canada

    dock83 Junior Member

    Well thanks for the reply Too seal the shaft too the housing I mesured the clearances I had inside and the shaft diameter and ordered the seat too fit from allballs racing luckily dewalt leves room in the grinder head for this.Also I had too remove 5mm from the ring gear to make some extra room. The head is aluminum welded too the brush saw shaft tube and the shaft of the saw fitted with a pin too spin the pinion gear. The rest of the fot is just fiber glass for the ball look and the fin. The shaft extition consist of th angle grnder orginal shaft using the disc nut I welded a bolt too it keeping it streight and then threaded the nut on too the angle grinder shaft and welded that too. Also I used some slicone too seal the face plate too the heat of the grinder and left it acessable for service.
     
  5. LyndonJ
    Joined: May 2008
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    Location: Australia

    LyndonJ Senior Member

    Thanks for sharing that.

    For most of us it would be easier to use the entire lower unit and gearbox from a defunct outboard and just adapt the power head.
     

  6. timbecht
    Joined: May 2011
    Posts: 19
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    Location: indiana

    timbecht Junior Member

    hey did you get it in the water yet and if so how does it work out for looking for ideas to try on my 14 foot jon boat and i like this set up
     
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