Setting timing for 28 hp marrina?

To set the timing for a 28 hp Marina engine, first ensure the engine is at operating temperature and idling. Use a timing light to check the timing mark on the flywheel against the specified timing degree in the service manual. Adjust the distributor by loosening the hold-down bolt and rotating it until the timing mark aligns correctly. Finally, tighten the bolt and recheck the timing to ensure accuracy.