ORIGINAL: Merc250
It is not the main shaft that the clutch and spurs are on, but the other shaft.
Thanks for your help!<br type="_moz" />
OK, Im still lost then..

I only know of the one main shaft in the transmission?Post a pic if ya can.. (Maybe the Volcano has a differnt tranny than the Tornado?)But I agree with BigMo, the 2 speeds are a pain in the neck.. I swapped the 2 speed out of my Tornado for the single speed..End of problems and seems just as fast as before..
EDit:Sorry, if this is the tranny you have, its totally different than the one Im talking about.. Sorry for the confusion.. (But if the shaft is moving back and forth, it's probably missing an "C" clip or something (maybe a setscrew), that keeps it centered? Pull it apart and see whats going on!Is this the one your referring to?