Finally...the last of the major hurdles on the 064 have been overcome. I just gotta pick up a new spark plug wire tomorrow(it's running one off one of my saws,) and it should be done. At this point it runs pretty well, I just haven't really been able to test it out other than a couple of cuts.
First it had a limited flywheel, but came with an unlimited coil...so timing was wayyyy advanced. Instead of a new flywheel, the owner wanted me to see what I could do with this one. I ended up not using a broaching tool, I originally tried using a tap that I ground down. Had the flywheel mounted to the 3-jaw on my lathe and was using the compound to hold the tap. That started to work until the tap broke. Don't laugh, but I finished it with a metal jigsaw blade. The results are satisfactory(not as pretty as I'd like,) and the owner will be able to get commonly available Stihl universal coils in the future.
That's how far out of time it was with the set up that came on it...no wonder it was just a box of parts:
The final piece of the puzzle was the
chain brake handle. For whatever reason, Stihl also had multiple variations of brake handles for the 064/066. Early 064/066 handles are narrower than later 066 handles. Also regardless of generation, the handles are different between 1/2 wrap and 3/4 wrap models. The brake handle that was for a 1/2 wrap, and would hit the
handlebar before it could disengage...unfortunately, he bought a brand new handle that was the same story. For whatever reason, it had a different part number, but had the same problem. Also a new brake flag for a wrap handle is unobtanium.
Luckily I have spare saw parts laying around and had a brake handle for a 3/4 wrap later 066/660. Against all odds, it's the right shape to clear the handle bar, but is about 1/3" too wide. Instead of doing some janky setup with washers, I machined a spacer for it. I wanted to do the spacer out of aluminum, but only had a block of it. So I through the block on the 4-jaw and eventually got it into the finished product. This is good for him, because this is yet another part that can now be commonly sourced.
Setting up the 4-jaw wasn't as painful as the last time I did it lol...I # the sides to make it easier to square up. I could've just gotten it close, but the block was barely thick enough, so I didn't want to use/lose anymore material than I had to:
