Well stripped down the 8.5hp Briggs and give the flywheel and coil a clean up on the wire wheel and cleaned up the pull starter set up that holds the flywheel on and that works now, cleaned the carby and fitted the new starter motor to it but when I went to give it a run it is blowing back through the carby, it fired and run for a very short time and I have not been able to get it to run since, it seems to be locking up like it is trying to turn the opisite direction or at least thats what it sounds like, making a clunking noise, when I get some more time I think it is time to drop the head off and check to see if the valves are seating, I will check for valve clearance first but still looks like the head is comming off. Is there something with the govenor that can affect the timing?