Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Engine full of oil? The squealing noise may be starter trying to turn engine that is too hard to turn! Remove spark plug and see if it turns. Can you manually rotate the engine using the flywheel screen on top?
I see question is still open, did you find problem?