Sounds like a worn piston not shutting the intake off like it used to. Quite common on an older well used 056. How is the power? Does it still accelerate cleanly?
Power on the saw is fantastic and it accelerates fine. I use it for cutting big stumps off, it zip right thru them. This saw has very few hours on it, I'd guess less than 100. It's just the air filter is soaked with fuel after running it a short time. What the "implulse line"? got any hints that would help me identify it?