Hey all. I had to pull the ignition coil out of my NU50. Getting the old one out wasn't too bad but putting the new one in presented some challenges. My hands are too big, especially to reach the front screw for installation. After thinking about it for a bit I decided I could make it a lot easier.
Put both screws in the new coil and then capture them by putting a small 1/8 or 3/16th o-ring on the threaded/upper end of the screw. Now feed the coil in from the back left side. Screws are in the coil ready to be turned in.
For the rear screw I substituted a socket-head (Allen) screw. This allows you to tighten it from below with a ball-headed Allen wrench. We all have those right? Buy some if you don't. You can just get enough angle to screw it in.
For the front screw I used a flange bolt. The built-in washer of the flange bolt lets you push the fastener up into the hole with a box end wrench. If you have a ratcheting box end wrench, it becomes total child's play at that point.
So M5 X 0.8 socket head in the back and flange bolt in the front. Easy peasy.