Fixed!!! As of today..I did what you had suggested and put my hand behind , managed to get a load of leaves out and 4 handful of grass cuttings. Tried the blower withthe engine on- no joy, same sound... So I switched the engine off and put my hand in again. This time I felt what |I thought was a piece of fibreglass insulation and a electrical wire attached to it!! I of course could not see what I was feeling!! When I pulled it out, it was a dead mouse!!! I screamed, threw it up in the air and moved on. I tried the blower again with the ignition on and lo and behold it worked, no more raspy rattly sounds!!
Thanks again- I saved my self over $200 + labor!!