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Chinese PDTO Chainsaw Choke Lever - Fringe Case # 869d

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3D model description

A customer brought in a Chinese chainsaw that he'd bought online. The choke level had broken and he didn't have any of the pieces. I've never heard of a PDTO, so I have no idea where to get replacement parts for this or if you even can. Fire up FreeCAD and a few iterations later, we're up by another happy customer.

I printed this in PETG to hopefully withstand the temperatures within a chainsaw at a layer height of 0.2mm and 40% triangular infill. You will need supports enabled and I raised it above the bed by 10mm so that the knob was better supported. The original lever more than likely had a plastic pin that hooked into the choke lever, but I knew that 3d printed plastic at that diameter would never hold up. Instead, I cut a small piece of heavy-duty wire I had laying around (maybe a coat hanger?) and bent it into a small 'L' shape. I heated up the longer end with a torch lighter and then pressed it into the hole, with the 'L' pointing towards the knob. Hook that into the choke lever and you're good to goat.

  • 3D file format: STL and TXT
  • Last update: 2020/11/20 at 07:54
  • Publication date: 2020/11/10 at 10:19



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I am a self-proclaimed know-it-all. I will tackle any project regardless of my experience, or lack thereof. Always ready to learn something new. With over 25+ years experience in electronic repair and 10+ years experience in small engine / ATV / motorcycle repair, there is nothing I can't fix, modify or build.

Why a pepper? In case anyone is curious as to why there is a hot pepper embossed into most of my designs... My nickname is Pepper and that little pepper logo is a hell of a lot shorter than "Copyright © 2017 by Derek J.G. Tombrello" which is how I usually sign my work :)

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