Anybody notice a difference in echo blowers last year or two. Mine seem to run like dog poop a lot and I beleive the carbs are to blame. Last year I bought this hand held and the first day it bogged down to half throttle. I took it back and they replaced the carb. Two weeks latter, the same thing. New spark plug, air filter, check fuel hoses for clear and checked that screen in muffler. No adjusment available on carb. Ran a little better. I always bought echo blowers, but now I have three one year old blowers that dont run as good as I like. What hand halds are most of you running and are you happy with them?