Small Engines (Lawn Mowers, etc.): blower

Question
I have echo pb413h blower. It starts fine and it works fine for 20-30 min. and than it overheats and stop working on high speed but it works on idle. I have to wait till it cools off and than it works again. I put premium 92 gas. I cleaned the screen. But it did not help. Maybe you can tell me what I can do. Thanks

Answer
What is the engine compression when it stops working?

If you install a new spark plug when it stops working will it start again right after you put in the new (cold) spark plug?

How old is the blower?

How many hours are on the blower?

Eric