Generator shuts down during operation and displays E04

Safety first: Turn OFF the generator, disconnect battery negative, and wait for all moving parts to stop.

• Inspect throttle linkage: Locate the throttle lever on the Honda engine and follow the linkage to the governor actuator. Check for binding, rust, or debris. Lubricate pivot points lightly with a suitable lubricant and ensure the linkage moves smoothly through its full range.
• Check governor actuator connection: Inspect the electrical connector at the electronic governor actuator for corrosion or loose pins. Clean and reseat the connector.
• Verify return spring: Ensure the throttle return spring is intact and properly attached. A broken or weak spring can allow overspeed.
• Inspect speed sensor: On models with a magnetic pickup at the flywheel or ring gear, check the sensor tip for metal shavings and ensure the air gap is within specification (refer to service manual). Clean the tip and adjust the gap if needed.
• Do not adjust governor blindly: Incorrect governor adjustment can cause dangerous overspeed. If linkage is free and the sensor is clean but E04 persists, have a qualified technician perform governor calibration using the Honda service procedure.