To elaborate on my previuos post, I have been fighting this thing for a couple months now. Igpoe mentioned to me, that these MD carbs are extremely intolerant of dirt, so that has been my main focus. Today, I broke down and vac-tested it, and it would not hold anything. Tore the powerhead down, and lo and behold, the seals are wasted. The clutch side is not real bad, but the mag-side is torn in three places.....both seals are stiff as a board. Thankfully, i have not ran it but a few seconds at a time. But, as i pulled the cylinder off, I also noticed the is a spot, under the exhuast port, where it looks like the plating has peeled away:bang:.
Looks like it happened a long time ago, so i am not sure if it will hurt anything,(saw has great compression)
Anyway, that is the progress report for today...lol
Dean, if you read this, PM me. You mentioned a fix for these Magnetos, one time....but i can't remember exactly what was involved. Mine still has spark, but the coil is cracked up, pretty bad.