USA / WHISPER 15 ULTRA / May 2004
25
• Starter battery voltage insufficient
Check battery voltage. Recharge the battery.
(battery too weak).
Inspect battery terminals and cables for a good
electrical connection (inspect against corrosion,
tattered wires, etc.)
• Faulty fuse on control panel.
Replace fuse
.
• Wiring control system faulty.
During the normal starting process, the battery
voltage drops to 11V (with a fully charged
battery). If the voltage does not drop during
starting, the electrical connection is faulty. If the
battery voltage drops lower than 11V, then the
battery has been discharged too deep.
• Starter broken.
Repair the starter motor.
• To thick engine lubricating oil.
Change oil for a lower viscosity.
Starter is cranking engine
• Out of fuel or faulty fuel, water in the fuel.
Fill up with fuel or replace by better quality.
smoothly, but engine fails
• Fuel solenoid is not opening.
Check wire connections and circuitry to solenoid.
to start.
(Refer to DC wiring diagram).
• Fuel lift pump is not working.
Check fuel filter and fuel lift pump: clean or
• Fuel filter is blocked.
replace if necessary.
• Air in fuel lines.
Bleed air from fuel system (refer to maintenance
section).
• Wrong valve clearance.
Adjust valve clearance.
• Low compression because of dirty valves.
Clean valves. Take off the injection bent and
inspect the outlet port. When little rust is in the
port one can clean the valve by taking of the valve
spring and rotate the valve. When the outlet port
is strongly affected by rust, the exhaust system is
not properly installed. Water has entered the
exhaust port or backpressure is too high. (refer to
paragraph 5.4.3) Contact Mastervolt service
department for advice.
• Blocked injector.
Have the injector tested and cleaned if necessary.
• Loss of compression by wear out
Repair by Mastervolt service.
or damage
Engine runs irregularly.
• Unsuitable contaminated fuel
Fill up with fuel or replace by better quality.
• Lack of fuel.
• Choked fuel filter.
Check fuel filter and fuel lift pump: clean or
replace if necessary.
• Faulty fuel lift pump.
Check and repair.
• Choked air filter.
Check the air intake.
• Lack of air.
• Choked exhaust system, exhaust blocked,
Check the exhaust hose.
rubber exhaust hose kinked.
• Faulty electronic governor Whisper 10 only Replace faulty parts
• Air in the fuel pipes.
Bleed air from fuel system (refer to maintenance
section).
• Blocked injector.
Have the injector tested and cleaned if necessary.
• Wrong valve clearance.
Adjust valve clearance.
• Temporarily hunting (this will disappear when engine has run in).
• Faulty electronic governor Whisper 10 only Replace faulty parts
Engine speed drops.
• Too much oil.
Drain oil to proper level.
• Lack of fuel.
Check fuel supply system: fuel pump and filter.
• Lack of intake air.
Check air intake.
• Choked exhaust system, exhaust blocked, Check the exhaust system.
rubber exhaust hose kinked.
• Generator overloaded.
Reduce the electrical load (switch off some
consumers).
TROUBLE SHOOTING
