new problem with throttle on 150 johnson 83'

[bcraigan]

I have come to the conclusion that my problem is in the shift box with the handle. I can't figure out what's wrong though. Changed the cable but now I still have to push it very far forward to get any throttle at all. ANy ideas? Also on the control box there is a tab that can be squeezed and lifted up. What is it's purpose? I would assume it's to rev the throttle up without putting the motor into gear, but I can't get it to do anything...