Generator attempts to start multiple times but fails to run, then shuts down and displays OVERCRANK fault.

Safety first: Place the Centurion standby generator in OFF on the control panel and open the main line circuit breaker to the house. Turn off the fuel supply at the gas shutoff before touching any fuel components.

• Check fuel supply: Verify the LP tank is not empty or that the natural gas supply is active. Confirm the gas meter is on and that there is no utility lockout.
• Inspect gas shutoff valves: Locate the manual gas shutoff near the generator and at the LP tank or NG riser. Ensure both valves are fully open (handle parallel to the pipe).
• Check for obvious leaks or damage: Smell for gas and visually inspect the Centurion fuel regulator and flexible gas hose for kinks, crushing, or damage. Do not use open flame to check for leaks.
• Inspect ignition components: Remove the spark plug boot and inspect the spark plug for heavy carbon, oil fouling, or cracked porcelain. Replace with the correct Centurion-specified plug if worn.
• Reset and test: Restore fuel, turn the control to AUTO, then initiate a manual test. If OVERCRANK returns, the fuel solenoid or ignition system likely needs professional diagnosis.

When to call a technician: If fuel supply and valves are correct and the unit still overcranks, a technician should test fuel pressure, fuel solenoid operation, and ignition coil output using proper gauges and meters.