Hey.I've been reading your posts lately and just signed up.Great site,a lot of useful information and help as i've seen.l am from Greece so you have to excuse my english and some questions about the terms you use.my story with the yellow beast begins back in the 80's when my father bought it from a sailor who brought it back from u.s.a.I was ten at the time and several years later it was my turn to bring firewood at home and i got the mac.I have used it for many years and at some point the piston jummed.i gave it to a mechanic to fix it and he replaced the piston ring and the piston.i am not sure about the piston because now that my mac is resting in a box in pieces,i saw the piston had scratches in both sides ( inlet and excaust) and after cleaning the top i saw the ipl number.Anyway the saw was working and several years later it wouldn't fire up.i went to two mechanics and they said they could not find any parts for the saw.One of them told me i had to replace the electronic ignition.I bought a husqvarna 450e and my mac ended in the selve until i found your site and thought that i might be able to rebuild it.I will need your help because i am not much of a mechanic and first i'll need a service manual and what ignition number to look for.mod 12-600061b.Thanks for your time