Well, after my S21ESR blew up, I got a pick-me-up today! I got my 4500 push Utility with a D410 engine running! I put a better starter on, cleaned the ports, cleaned the flywheel magnets, cleaned the cd pack, and installed a new primer bulb. I drained the old fuel out, put new in, adjusted the fuel line, primed it, pull the rope a few times, and it was running! It runs and pushes great! It feels great to get an old Lawn-Boy running! I now have it up for sale on Craigslist, along with my 0292B (JC Penney Lawn-Boy).....