Introduction
Engine type: 6DC-17 
Maker: Daihatsu 
560 kW, 900 rpm.

I.Fault Symptoms
To meet the crane’s power demand, Generators No. 1 and No. 3 were operated in parallel.
the duty engineer observed abnormally low exhaust gas temperatures (EGT) in Cylinder No. 6 of AE No. 3, with deviations increasing from 30°C to 50°C over successive checks. After adjusting fuel injection, EGT temporarily normalized. However, Generator No. 3 later tripped unexpectedly, causing a total blackout.

II. Fault Diagnosis and Resolution
1. Initial Checks
Fuel injection timing: Normal.
Fuel injectors and pumps: No visible defects in pressure testing or atomization.
Fuel supply lines: No blockages detected.

Introduction
AE type: MAN B&W 6L23/30H , 720 rpm. 
Auxiliary Engine No. 4 failed to start. The specific symptom was:
Local startup attempt: Engine speed failed to reach the ignition threshold of 110 rpm, resulting in startup failure. Repeated attempts yielded the same result.

I. Fault Diagnosis
A systematic troubleshooting approach was applied to inspect the AE and its systems:
1.Fuel System Check
Fuel pressure and temperature were normal. No blockages, leaks, air bubbles, or contaminants were detected.
Conclusion: Fuel system ruled out.
2.Starting Air System Check
Air pressure and supply were sufficient. The starting motor operated normally, confirming adequate cranking speed.