SteveSr
Addicted to ArboristSite
It still sounds very lean. Is it possible that it is partial seizing at WOT when it is getting too hot and then when it cools down it starts to run again? THis is not unheard of with 2-strokes. Hard starting may be another clue that the compression is not to standard.
A non-adjustable carb on a AM engine is a BAD idea. These carbs are tuned to run (and borderline VERY lean) on a specific Stihl motor configuration. It is unlikely that your AM engine is even CLOSE to the same spec. It may require more fuel than that particular carb puts out. At this point your option is to try a Walbro WT-215 fully adjustable carb. This should at least allow you to run the saw (if it is ever going to run) without burning it up.
A non-adjustable carb on a AM engine is a BAD idea. These carbs are tuned to run (and borderline VERY lean) on a specific Stihl motor configuration. It is unlikely that your AM engine is even CLOSE to the same spec. It may require more fuel than that particular carb puts out. At this point your option is to try a Walbro WT-215 fully adjustable carb. This should at least allow you to run the saw (if it is ever going to run) without burning it up.