Small Engine Troubleshooting Problems? Ask a Mechanic Now.
If you work the main lever, is the inner shaft moving? See link above.
You may have to remove the lever and use a wrench on the shaft.
I see a new question, with no response to this one. Now you say this is Deere mower, is it a 445 or the 425 from this question? 2351 is not a Deere model. 425 and 455 are different mowers. Please respond to this question, every time you open new question, they will charge you again!