064 Fly Wheel

[Dean]

Hi guys.  A few questions for the experts here. I have a Stihl 064 flywheel that has 2 key ways in it. One is marked with an "X" and one is marked with a "P".   1 - what do these letter designations stand for? 2 - Are these for standard and advanced ignition? 3 - How far can the ignition on an 066 be advanced? 4 - Does anyone know where I can get information on ignition timing for saws?  I realize that the ignition timing is factory set, but would like to play with them a little if there is any room for it. Any help would be greatly appriciated.

[Kevin]

The timing is not adjustable but I'm no expert.  ;D

[stihltech]

The X is used on Bosch and Lida ignitions. The P is for prufex ignitions.