Vetus M4.55 Operation Manual page 77

7 Troubleshooting
5 Engine does not reach maximum rpm under load
Possible fault
Air in fuel system.
Fuel filter clogged with water
and/or contamination.
Leaking fuel supply line or fuel
injection line.
Faulty injector/injection pump.
Setting of stop valve incorrect.
Oil level too high.
Lubricating oil incorrect SAE
spec or quality for ambient tem-
perature.
Incorrect valve clearance.
Exhaust restricted.
Insufficient intake air.
Wrong fuel quality or contami-
nated fuel.
Incorrect injector timing.
Leak in inlet manifold.
Engine overloaded.
Remedy
Check and bleed.
Check or replace.
Check / replace.
Check, replace if required.
Check / adjust.
Lower level.
Replace.
Adjust.
Check / clean.
Check.
Check fuel. Drain and flush
fuel tank. Replace with new
fuel.
Check / adjust..
Check / replace.
Check size of propeller.
6 Engine overheats
Possible fault
Coolant level too low.
Sea cock closed.
Raw water strainer clogged.
Leak in raw water feed system.
Faulty thermostat.
Faulty coolant pump.
Faulty raw water pump impeller.
Faulty injector/injection pump.
Oil level too high.
Oil level too low.
Faulty oil filter.
Faulty turbo compressor.
Heat exchanger dirty or clogged
as a result of rubber particles
from a worn impeller.
Insufficient intake air.
Leak in inlet manifold.
Motor becomes apparantly over-
heated as a result of faulty tempe-
rature switch, sensor or meter.
Fault finding table
Remedy
Check / top up.
Open.
Check / clean.
Check / replace.
Check / replace.
Check / replace.
Check / replace.
Check, replace if required.
Lower level.
Increase level.
Replace.
Check / replace.
Check / clean.
Check / replace air intake
filter.
Check / replace.
Check / replace.
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