MTU MW15406/17E Operating Instructions Manual page 131

Engine does not reach full load speed
Cause
Fuel supply blocked.
Fuel prefilter clogged.
Easy-change fuel filter clogged.
Air filter clogged.
Injector faulty.
Injection pump faulty.
Engine wiring faulty.
Overload.
Vessel too heavy.
Trim position incorrect.
Marine growth on hull, propeller
shaft, propeller, rudder.
Rudder position incorrect.
Propeller too big after
replacement.
Engine speed not steady
Cause
Injector faulty.
Injection pump faulty.
Speed sensor is faulty.
Air in fuel system.
Engine control unit ECU is
defective.
Charge-air temperature too high
Cause
Incorrect engine coolant
concentration.
Charge-air cooler is
contaminated.
Air inlet temperature in engine
room is too high.
Charge-air pressure too low
Cause
Air filter clogged.
Charge-air cooler is
contaminated.
Exhaust turbocharger faulty.
Corrective action
u Completely open shutoff valve upstream of fuel prefilter.
u Replace filter element (→ Page 179).
u Replace (→ Page 173).
u Check signal ring position of contamination indicator
(→ Page 184).
u Replace (→ Page 163).
u Replace (→ Page 160).
u Check (→ Page 214).
u Contact Service.
u Check load.
Reduce load.
u Trim vessel.
u Clean components.
u Align rudder.
u Install suitable propeller.
Corrective action
u Replace (→ Page 163).
u Replace (→ Page 159).
u Contact Service.
u Vent fuel system (→ Page 171).
u Contact Service.
Corrective action
u Check (MTU test kit).
u Contact Service.
u Check fan
Check air inlet/outlet ducts.
Corrective action
u Check signal ring position of contamination indicator
(→ Page 184).
u Contact Service.
u Contact Service.
MW15406/17E 2014-05 | Troubleshooting | 131