Generator will not start and shows E16 on the controller.

Safety first: Allow the engine to cool completely before opening the cooling system. Hot coolant under pressure can cause serious burns.

• Check coolant level: Remove the radiator cap when cool and verify coolant is at the proper level. Top up with Yamaha-approved coolant mixture.
• Inspect for leaks: Examine hoses, clamps, radiator core, and water pump area for signs of dried coolant or wet spots. Tighten clamps or replace leaking components.
• Check overflow tank: Ensure the overflow reservoir has coolant between MIN and MAX marks. A cracked reservoir can cause level sensor faults.
• Test coolant level sensor: If coolant level is correct, test the level sensor in the radiator or tank for proper operation and replace if faulty.
• Reset and test: Clear E16 and run the generator while monitoring coolant level and for any new leaks.