Kubota standby generator cranks normally but will not start; no error code is displayed on the controller.

Safety first: Ensure the generator is in OFF mode and cannot auto-start unexpectedly while you work.

• Verify controller mode: Confirm the Kubota controller is in MANUAL or AUTO as required and that no start inhibit timers are active.
• Check fuel shutoff solenoid: With an assistant cranking the engine, feel or listen for the click of the fuel shutoff solenoid at the injection pump. Measure voltage at its connector; if no voltage, trace wiring back to the controller. If voltage is present but the plunger does not move, replace the solenoid.
• Bleed fuel system: Open bleed screws on the fuel filter and injection pump and use the hand primer until fuel is free of air. Tighten screws and retry starting.
• Check air intake: Ensure the air filter is not completely blocked and that the intake duct is clear.
• Compression check: If the engine cranks quickly with no smoke and never attempts to fire, a compression test may be needed to rule out internal engine wear (technician recommended).