TM 5-4310-376-14
Table 4-2. Organizational Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 7. Check nozzle (5) for looseness. If loose, tighten, being sure tip of nozzle
seats in aperture in throat of carburetor.
3. ENGINE KNOCKS OR LACKS POWER
Step 1. Be sure that gas is clean and fresh. If not, drain tank and lines and refill
tank with fresh gas.
Step 2. Check engine acceleration in accordance with MALFUNCTION 2, step 5.
Adjust carburetor (para 4-28). If engine operates under heavy load,
adjust for slightly higher mixture.
Step 3. Check ignition timing (armature adjustment) in accordance with MAL-
FUNCTION 1, step 3a.
Adjust armature as instructed.
Step 1. Check carburetor for too lean a mixture.
Adjust carburetor for slightly richer mixture (para 4-28).
restriction (with engine running).
Do not touch hot muffler, cylinder head, or fins as con-
tact may cause severe burns. Allow sufficient time to
cool.
Replace muffler (para 4-29).
5. ENGINE EXHAUST SMOKE EXCESSIVE
Step 1. Check carburetor adjustment.
Adjust/replace carburetor (para 4-28).
Step 2. Check for a leak at the seal between oil filler tube and crankcase cover,
or at upper end of dipstick.
Replace dipstick.
4-20
