MQ Power WHISPERWATT DCA600SSV4F3 Operation Manual page 66

Symptom
Engine revolution is not smooth.
Either white or blue exhaust gas is observed.
Either black or dark gray exhaust gas is
observed.
Defi cient output.
PAGE 66 — DCA600SSV4F3 60 HZ GENERATOR • OPERATION MANUAL — REV. #2 (11/15/22)
TROUBLESHOOTING (ENGINE)
Troubleshooting (Diesel Engine) continued
Possible Problem
Fuel fi lter clogged or dirty?
Air cleaner clogged?
Fuel leak due to loose injection pipe retaining
nut?
Injection pump malfunctioning?
Incorrect nozzle opening pressure?
Injection nozzle stuck or clogged?
Fuel over fl ow pipe clogged?
Governor malfunctioning?
Excessive engine oil?
Piston ring and liner worn or stuck?
Incorrect injection timing?
Defi cient compression?
Overload?
Low grade fuel used?
Fuel fi lter clogged?
Air cleaner clogged?
Defi cient nozzle injection?
Incorrect injection timing?
Engine's moving parts seem to be seizing?
Uneven fuel injection?
Defi cient nozzle injection?
Compression leak?
Solution
Clean or change.
Clean or change.
Tighten nut.
Repair or replace.
Adjust.
Repair or replace.
Clean.
Repair.
Reduce to the specifi ed level.
Repair or replace.
Adjust.
Adjust top clearance.
Lessen the load.
Use the specifi ed fuel.
Clean or change.
Clean or change.
Repair or replace the nozzle.
Adjust.
Repair or replace.
Repair or replace the injection pump.
Repair or replace the nozzle.
Replace head gasket, tighten cylinder head
bolt, glow plug and nozzle holder.