I received the new coil and a used flywheel (P/N: 11304001201A) for the MS-180. That was the saw whose parts I was trying on the 017. The coil did not fit the 017 - the mounting holes are not in the same place. The coil for an MS-170 may or may not fit the 017, but I just don't know.
As for the flywheel, that worked fine. The MS-180 flywheel fit on the taper and key perfectly, just like the old. Since that was as far as I could go, I tuned the L and H screws, and called it a day. The saw runs great!
I suspect that a coil and flywheel from the MS-170 might work, but I am not going to buy more parts for a saw that now runs. It's worth noting, in case it wasn't mentioned above, the reason the coil and flywheel were upgraded for models after the 017 was to improve acceleration (better timing I suspect).
Look at photos (I haven't done this yet) of the 017 coil and the MS-170 coil versus the MS-180 coil. There's a reasonable chance that the coils for the 017 and MS-170 are the same, while the one for the MS-180 is slightly different, but I just don't know.
Hope that helps! S
