Zagnut - I was alone, hence the need for pictures to prove it. I have previously verified this tach is correct by comparing with another tach, and also by aiming it at a light bulb on 60Hz AC power, and get a reading of 3600 (60Hz X 60sec = 3600 "RPM").

CrazyHerb - Using 2" Canadian gutterpipe from Rona/Revy for the fuse. I bought an aluminum strike plate for where you push open a door and cut it into a square. Drilled the holes to match the crankcase of the Poulan and replaced the bolts with slightly longer ones to go through the plate and the plastic crankcase cover. This just barely fits inside the 2" gutterpipe. I then cut out the corners and wrapped the metal around the fuse. I placed plastic doubler inide the fuse al the way around the mount and then placed 6 screws through both. 2 on top, 2 on the bottom, and one each side.

Here's a close-up.