MQ Power DCA300SSJU4F3 Operation Manual page 71

Symptom
Low engine power output and low speed,
black exhaust smoke.
Engine overheats.
DCA300SSJU4F2/F3 60 HZ GENERATOR• OPERATION MANUAL — REV. #2 (04/18/22) — PAGE 71
TROUBLESHOOTING (ENGINE)
Troubleshooting (Engine) - continued
Possible Problem
Air filter blocked?
Incorrect valve clearances?
Malfunction at injector?
Too much oil in engine crankcase?
Entire cooling air system contaminated/
blocked?
Fan belt broken or elongated?
Coolant insufficient?
Radiator net or radiator fin clogged with dust? Clean net or fin carefully.
Fan, radiator, or radiator cap defective?
Thermostat defective?
Head gasket defective or water leakage?
Solution
Clean or replace air filter.
Adjust valves per engine specification.
See engine manual.
Drain off engine oil down to uppermark on
dipstick.
Clean cooling air system and cooling fin
areas.
Change belt or adjust belt tension.
Replenish coolant.
Replace defective part.
Check thermostat and replace if necessary.
Replace parts.