Whisper Power M-SC6 User Manual page 30

TROUBLE SHOOTING
PROBLEM
Starter is turning engine
smoothly, but engine fails to
start
Engine runs irregularly.
Engine speed drops
Engine does not stop on
command
30
CAUSE
• To thick engine lubricating oil.
• Out of fuel or faulty fuel, water in the
fuel.
• Fuel solenoid is not opening.
• Fuel lift pump is not working.
• Fuel filter is blocked.
• Air in fuel lines.
• Wrong valve clearance.
• Low compression because of dirty
valves.
• Blocked injector.
• Loss of compression by wear out or
damage
• Unsuitable contaminated fuel
• Lack of fuel.
• Choked fuel filter.
• Faulty fuel lift pump.
• Choked air filter.
• Lack of air.
• Choked exhaust system, exhaust
blocked, rubber exhaust hose kinked.
• Air in the fuel pipes
• Faulty electronic governor (only if
applied)
• Blocked injector.
• Wrong valve clearance.
• Temporarily hunting (this will disappear when engine has run in).
• Ongoing hunting caused by faulty
electronic governor (only if applied)
• Faulty electronic governor (only if
applied)
• Too much oil.
• Lack of fuel.
• Lack of intake air.
• Choked exhaust system, exhaust
blocked, rubber exhaust hose kinked.
• Generator overloaded
• Generator over energised.
• Defective generator (windings,
bearings or other)
• Damaged engine
• Fuel solenoid is not switching off
• Loss of control
SOLUTION
Change oil for a lower viscosity.
Fill up with fuel or replace with better quality.
Check wire connections and circuitry to
solenoid. (Refer to DC wiring diagram)
Check fuel filter and fuel lift pump: clean or
replace if necessary.
Bleed air from fuel system (refer to
maintenance section).
Adjust valve clearance,
Clean valves. Take off the injection bent and
inspect the outlet port. When little rust in the
port clean the valve by taking off the valve
spring and rotate until rust is removed. When
the outlet port is strongly affected by rust, the
exhaust system is not properly installed (refer
to paragraph 5.4.3). Contact WhisperPower
service department for advice.
Have the injector tested and cleaned if
necessary.
Repair by WhisperPower service
Fill up with fuel or replace by better quality.
Check fuel filter and fuel lift pump: clean or
replace if necessary.
Check and repair
Check the air intake
Check the exhaust hose
Bleed air from fuel
maintenance section).
Replace faulty parts.
Have the injector tested and cleaned if
necessary.
Adjust valve clearance.
Replace faulty parts.
Replace faulty parts.
Drain oil to proper level.
Check fuel supply system: fuel pump and filter.
Check air intake.
Check exhaust system.
Reduce the electrical load (switch off some
consumers).
Check that the proper capacitor type is
installed and that it is connected correctly.
Generator must be sent to manufacturer for
repair of damaged bearing or winding.
Repair by WhisperPower service
Faulty Digital Diesel Control unit. Stop the
engine manually by the stop handle.
Check wire connections to stop solenoid.
Check solenoid valve function. Replace if
necessary
December 2010 / M-SC6/8/10 / EN
system (refer to