Took the secondary apart on my 96 ultra to clean it and replaced the buttons. Put it back together and it won't run.belt goes half way down. Which way and how far should I turn the helix when assem.? Could the spring have lost tension during storage? Maybe some could walk me through how to assemble to see if i missed something.Ran great last year should have left it alone. Just got 15" and I'm bumming!