I have a Honda GSV 190 mower engine with a broken starter rope and stud stuck in starter that I can't remove. Any ideas would be great

When removing the nuts holding the recoil starter in place the nut on the front of the starter is stuck. When I try to remove it the whole stud come out of the engine. Leaving the engine cover stuck to the starter preventing me from replacing the rope. I have tried everything I can think of to remove it with no luck. Heres what it looks like. http://www.ereplacementparts.com/bolt-stud-h425mm-p-554740.html

Hold the bolt in a vice or with vice grips and try undoing the nut