When I first saw this thing on the curb, I pulled the cord to see if it would turn and it did. There was no gas in it so that is as far as I went. I folded the handle down and put it in the back of my car.
When I got it home, my first troubleshooting step was to put a little gas in it and pull the cord to see if it would start. Nothing worked, so I pulled some more and all I succeeded in doing was breaking the handle free from the rope, which ran away back inside it's hole. I tried the electric start and while that didn't start the motor, the electric motor was very strong and worked perfectly.
I took off the top and bottom covers, which were in decent shape. They had some cracks in them, and a few of the fastening holes had broken tabs, but they would still stay on and keep snow out. The top cover is held on with just nuts and studs at the top end, and carriage bolts from the inside of the auger housing. The housing has square holes that hold the square collar on the carriage bolt and prevent them from turning. Once the bolt loosens up it will spin freely and you will have to hold them tight to the housing. I had to use a lot of WD-40 to unfreeze these bolts and I ended up holding the carriage bolts with some locking pliers. Since a lot of snow builds up on the top of the auger housing, I expect most snow blowers would have the same issue.
I was hoping to find a service manual, but there aren't any online. I found the original operating manual here
but that is only 3 pages so it isn't much help. I also found some parts diagrams on this
website. They can be helpful, if only to see how things come apart. I also found this better operating/service manual
but that only shows how to service the auger belt and fold up the handle for storage.Update:
I found the parts manual for the 3200, 3201, 3202 and 3203 models. I attached the PDF below.