I have a model GBI 20 that quite frankly has never given me a moments trouble for over 10 Years. I don't know what came over me, but I discovered that I had stored the blower at the end of last year with fuel in it. The way I discovered it was I found a yellow orange substance directly underneath it on the garage floor. I haven't as yet ventured to break it apart because 1)I'm not sure where I'm headed because 2) I don't have a manual. My question is should I just start replacing parts or is there a specific area such as the carburetor, where I need to start. My appreciation for any and all assistance. Mark