Controller shows E20 and generator shuts down with black smoke

Safety first: Exhaust components are extremely hot. Allow cooling before touching. Ensure adequate ventilation around the exhaust outlet.

• Reduce load: Open the output breaker and remove non-essential loads. Restart and gradually reapply load while monitoring exhaust temperature and smoke.
• Inspect exhaust: Check for crushed or blocked exhaust piping, bird nests, or soot buildup in the muffler.
• Sensor check: Locate the exhaust temperature sensor (thermocouple or RTD) in the exhaust manifold or outlet. Inspect wiring and replace the sensor if readings are clearly abnormal.
• Professional service: Persistent high exhaust temperature with normal load may indicate injection or turbocharger issues (if equipped) and requires a diesel specialist.