|This tool is used to align timing numbers and marks to the crankcase parting line on Lycoming engines. It permits timing from the marks on the aft side of the flywheel. A spring clip holds the tool to the flywheel.|
No more straight edge for me, this tool snaps onto the flywheel, align the pointer on the flywheel and the other end of the pointer can be seen easily at the case halfâ€™s. Itâ€™s to easy to time the magnetos now.
This particular tool was not designed for use on a Lycoming IO-540. The steel pin is longer than what will fit between the back of the flywheel and the case. I had to cut the steel pin and re-grind the pointy end on it in order to make it fit. I did call the manufacturer and he kindly offered to shorten my pin for me if I sent it to him but I found it faster to do myself. He said it was originally designed for a 320. It did work as advertised after I modified it.