Kubota generator produces excessive white smoke from the exhaust during startup and initial running.

Safety first: Operate the generator in a well-ventilated area. Avoid inhaling exhaust fumes.

• Check preheat system: Verify glow plugs or intake air heater are functioning (see glow plug and heater fault procedures). Proper preheat reduces white smoke.
• Fuel quality: Ensure diesel fuel is fresh and appropriate for the temperature (winter blend in cold climates). Drain and replace stale or contaminated fuel.
• Run to warm up: Allow the engine to reach operating temperature under light load. Some white smoke on very cold start may be normal and should diminish as the engine warms.
• Injector service: If white smoke persists when warm, have the injectors tested and serviced by a diesel specialist. Poor atomization can cause incomplete combustion.
• Compression and timing: Persistent heavy white smoke may indicate low compression or incorrect injection timing, requiring professional engine diagnosis.