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 TM 55-1905-219-14-3
Table 3-1. Propulsion Engine - Exhaust Smoke Analysis
Troubleshooting (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Black or gray smoke caused by excessive fuel or irregular fuel distribution (Cont).
Step 2.
If this condition still persists after timing the injectors.
Replace faulty injectors. Refer to paragraph 3-15.
NOTE
Avoid lugging the engine as this will cause incomplete combustion. If problem remains, refer to Direct Support
Maintenance.
3. Black or gray smoke caused by improper grade of fuel.
Check for use of an improper grade of fuel:
DIESEL FUEL
TYPE
NATIONAL STOCK
NUMBER
ARTIC (DF-A)
WINTER (DF-W)
REGULAR (DF-2)
4. Blue smoke.
Check for internal lubricating oil leaks.
Lubricating oil not burned in cylinder (blown through cylinder during
scavenging period. Refer to the High Lubricating Oil Consumption
3-22
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