Not clutch related at all.
Throttle hang. Search in the faq and troubleshooting forum for info (also on the main contour.org page under common problems). A very simple (5-10 minutes) and cheap (20 cents or so) fix will cure you. The same "fix" cures the "moose" as people here call it. Searching for MOOSE fixes can lead you to the same thing.
Ray