Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Make and model? Engine? Twin or single cylinder? Have you ran a cylinder balance test , if it is a twin?
Push mower? Engine model number? has blade struck object that would stop engine? If so, the timing key on the flywheel is damaged.
Only way timing can change is the timing key , between the crankshaft and the flywheel. other than the coil next to the flywheel. it may be loose. Is this Briggs engine?
Yes, but I have never seen a 6.5 Ryobi engine.
Did you find problem?