Jet,

This exact same thing happened to me about 10 days ago. Turns out my throttle cable just broke. You can verify this by unattaching the connection at the carb and seeing if you can pull the inner cable out (this will only happen if it is indeed broken and you will be able to pull it out freely until the break). I did this first because I was hoping I wouldn't have to deal with the throttle lever assembly (its a PITA to get out of the hole in the hull of my comp). Unfortunately, this wasn't the case.

If it is indeed broken, leave the existing cable in the boat until you get a new one. You'll want it to feed the new one through. I'd take pictures of the connections at both the carb and throttle lever assembly, as the cable connections can be adjusted by the location on the cable threads.

If you do end up having to replace it, would you mind posting pictures of both the existing carb connection and throttle lever/assembly connection? I made the mistake of not taking pictures before I replaced it with the new one so now I'm in the trial and error process.