Whisper Power m-sq25 User Manual page 30

TROUBLE SHOOTING
PROBLEM
Engine runs irregularly.
Engine speed drops
Engine does not stop
command
Engine exhaust smokes
30
CAUSE
• 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.
• Disturbances on the electrical system/
user side.
• Faulty fuel lift pump.
• Choked air cleaner.
• Lack of air.
• Choked exhaust system, exhaust
blocked, rubber exhaust hose kinked.
• Air in the fuel pipes
• Blocked injector.
• Wrong valve clearance.
• Temporarily hunting (this will disappear when engine has run in).
• Too much oil.
• Lack of fuel.
• Lack of intake air.
• Choked
exhaust
blocked, rubber exhaust hose kinked.
• Generator overloaded
• Defective
generator
bearings or other)
• Damaged engine
• Fuel solenoid is not switching off •
on
• Loss of control
• Faint blue smoke - generally the result
of light load
• Heavy blue smoke - caused by
lubricating oil: Overfull oil sump or worn
cylinder bore, stuck broken or worn
piston rings.
• Black smoke –incomplete combustion
caused by: Overload, choked air
cleaner, inlet temperature too high,
unsuitable fuel or water in fuel.
SOLUTION
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 clean. When the outlet
port is strongly affected by rust, the exhaust
system is not properly installed (see paragraph
5.4.3).
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 if electrical load is fluctuating.
Try the pump by manual operation. Repair
when faulty or replace
Check the air intake
Check the exhaust hose
Bleed air from fuel system (see maintenance
section).
Have the injector tested and cleaned if
necessary.
Adjust valve clearance.
Drain oil to proper level.
Check fuel supply system: fuel pump and filter.
Check air intake.
Check exhaust system.
system, exhaust
Reduce the electrical load (switch off some
consumers).
Generator must be sent to manufacturer for
(windings,
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 fuel solenoid.
Check solenoid function. Replace if necessary
Increase load.
Check the oil level.
Check the compression.
Check air cleaner
Check the fuel .
Check for overload.
Contact WhisperPower
November 2010 / M-SQ20 / 25 / EN
service