Here's your service manual 981-0530c onan service manual.
Before you try to start it anymore open the front and stick your
http://www.cumminsonan.com/www/pdf/manuals/981-0530C.pdf hand to the left around the air cowling and turn the flywheel to see how hard it is to turn. If its really hard to turn clockwise its going to be hard for the starter to turn it too.
If you have to pull the starter to check the plastic gear you have to pull the top cover off the gen that's the hardest part you need torques head bits I don't remember the size.
