TM 5-4310-376-14
Table 3-1. Operator Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. ENGINE MISSES OR RUNS ERRATICALLY
Check that choke is not partially closed.
Step 1.
Open choke fully.
Step 2.
Check air cleaner for restrictions.
Service air cleaner (para 3-6b(3)).
3. ENGINE KNOCKS
Check oil level.
Fill to proper oil level.
4 . ENGINE EXHAUST SMOKE EXCESSIVE
Step 1.
Check oil level.
If overfilled, remove excess oil.
Step 2.
Check air cleaner.
Service air cleaner (para 3-6b(3)).
Check air cleaner for restrictions.
Step 1.
Service air cleaner (para 3-6b(3)).
Step 2.
Check oil level.
Fill to proper oil level.
Step 3.
Check cooling fins and blower screen for dirt and/or restrictions.
Clean cooling fins.
6. ENGINE BACKFIRES OR LACKS POWER
Step 1.
Check fuel for dirt or water.
Drain fuel tank and refill with fuel.
Step 2.
Check air cleaner for restrictions.
Service air cleaner (para 3-6b(3)).
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