Trouble shooting table
13
Fault
Remedy
(This column is filled in only if the
”probable cause” gives no clue as
to what must be done).
Probable cause
Fuel consumption too
high
D Constant full-load operation
D Speed resistance owing to incrustation
of hull, shaft system and propeller with
foreign matter
D Poor efficiency of the drive system
D Fuel quality does not satisfy regulations
D Fuel leaks in the system
D High power requirements by additional
units (hydraulic pumps, compressors
etc)
D Delivery start set incorrectly
D Injection pump set incorrectly or defec-
tive
D Valve clearance incorrect
D Intake vacuum / exhaust backpressure
too high
D Injection nozzles worn
D Adjust propeller
D See ”Fuels, Lubricants ...”
D Remedy by Bosch Service
Black smoke D Lack of combustion air, intake vacuum
too high
D Engine speed reduction owing to the
propeller’s taking up too much power
D Sudden full load after long low load or
idling periods
D Air filter contaminated
D Leaks in air pipes downstream of com-
pressor
D Diaphragm in wastegate leaky
D Intercooler leaky, defective
D Unsuitable fuel
D Turbocharger defective
D Delivery start set incorrectly
D Injection nozzles defective, coked
D Injection pump set incorrectly or
defective
D Exhaust backpressure too high
D Check intake air supply to air fil-
ters (engine room ventilation)
D See ”Fuels, Lubricants ...”
D Remedy by Bosch Service
Blue smoke D Engine coolant/intake air still too cold
D Mainly low-load operation
D Piston rings worn or broken
D Valve guides worn
D Crankcase breather clogged (overpres-
sure in crankcase)
White smoke D Engine coolant/intake air still too cold
D Water evaporates in exhaust gas pipe
during raw water injection
D Delivery start set incorrectly
D Cylinder head gasket leaky/burned
through
D Fuel quality does not satisfy regulations
D Injection nozzles defective
D Injection pump set incorrectly or
defective
D See ”Fuels, Lubricants ...”
D Remedy by Bosch Service
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