Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Fan on as soon as engine starts is normal. Best way to get the blades off is impact wench, and a 6 point socket, an electric impact for tires is the best tool, if air is not available. If engine is running on both cylinders, fuel filter and air filter is clean, it's probably doing all it will do. Best thing you an do is sharpen or replace the blades. And do not use a mulching blade!