I remember back in the day I'd get the timing on my old Pontiacs set were I wanted for performance and they would burn up starters trying to hot start. My fix was a switch in the glove box to shut of the power to the coil, all I did was get it rolling over and flip the switch, worked like a charm.Info on Stihl Coils has been posted in the past. It is not really a gradual increase, but more like a couple of steps are various RPMs.
The only important # is the total advance, and it is great to keep that in sync with any mods to the saw. Then you hope it remains easy to start, but it will not always happen that way! Sometimes, you just have to reach a balance.
I have even seen folks retard timing from the original position to make the saw easier to start. The thought makes me shudder, but I also hate a saw that bits me! Cool weather seems to magnify the problem. (thicker oil in the cylinder)
@X_makina I have seen videos on youtube where they were using a timing light on a saw, pretty sure it was just last week.
I'll check my history and see if I see it.