Generator emits white smoke or steam from exhaust, especially on startup.

Safety first: Prolonged white smoke may indicate serious engine issues. Monitor coolant and oil levels closely.

• Short-term condensation: Light white vapor that disappears as the engine warms is often normal condensation.
• Check coolant level: If coolant level drops and white smoke persists, a head gasket or liner leak may be present. Do not continue to operate; contact a technician.
• Monitor oil condition: Milky oil indicates coolant contamination and requires immediate service.
• Injector service: For diesel units, have injectors tested if white smoke smells of unburned fuel.