Originally Posted by
IthaDan
How about the rest of my advice? Can you get the shifter to lock into all three positions with the cable free to travel?
Edit: yes, either that or use the barrel adjuster on the shifter itself.
The limit screw isn't the problem - it shifts onto the big chainring when I operate the cable directly. I did try the "blind" WD-40 approach, without success. I'm going to try to open it up and free the stuck pawl with a toothpick + WD-40 after work today.
Thanks to everyone for all the suggestions.