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TM 5-4320-313-14
4-9.
TROUBLESHOOTING. (Refer to table 4-2).
Table 4-2. Unit Maintenance Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE CRANKS BUT FAILS TO START.
Step 1. Check that extra fuel button has been pulled out prior to starting.
Pull out extra fuel button and attempt to start engine (paragraph 2-6).
Step 2. Check window of air filter indicator for red band indicating blocked
air filter.
If red band appears in window of air filter indicator, replace air filter
element (paragraph 4-10).
Step 3. Check for empty fuel tank.
WARNING
Death or serious injury could occur if fuel is not handled carefully. Use in a well-ventilated area away
from open flame, arcing equipment, ignition sources, heaters, or excessive heat. Engines must be
turned off and cool before refueling. Do not smoke.
If fuel tank is empty, fill with fuel (item 3, appendix E).
Step 4. Check vent valve for proper function.
WARNING
Death or serious injury could occur if fuel is not handled carefully. Use in a well-ventilated area away
from open flame, arcing equipment, ignition sources, heaters, or excessive heat. Engines must be
turned off and cool before refueling. Do not smoke.
a. Disconnect hose from double ring piece at fuel tank. Turn engine with starting handle.
b. If fuel does not flow from hose, remove vent valve. Check valve by shaking for free movement of internal
valve ball.
4-5
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