Fuel level reading erratic or stuck; low fuel alarm active despite full tank.

Safety: Work in a well-ventilated area away from ignition sources when opening fuel tanks.

• Verify actual fuel level: Use a dipstick or sight glass to confirm tank level.
• Inspect sender wiring: Check the harness from the fuel level sender to the generator controller for damage or loose connections. Repair as needed.
• Check sender movement: Remove the sender from the tank if accessible and gently move the float through its range while monitoring resistance or controller reading. If it sticks or reads open/short, replace the sender.
• Calibrate if required: Some controllers allow fuel level calibration. Follow the controller manual to recalibrate after sender replacement.