The 181-143-212 coil you ordered fits the PS-5105 Easy Start and the Makita EA5000P. This will not work in your saw. Timing difference and the plug wire will be shorter.
You need the 181-143-205 or 181-143-206 part number coil. 181-143-206 supersedes the 181-143-205 ignition coil. This coil is...