TM 10-4320-318-14
Table 3-1. Troubleshooting Procedures
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE DOES NOT START.
Step 1. Check fuel level in tank.
Add fuel, if required.
Step 2. Check if extra fuel button is pulled.
Pull extra fuel button before starting.
Step 3. Check if speed control lever is in the RUN position.
Move speed control lever to RUN position.
2. ENGINE IS HARD TO TURN.
Step 1. Check oil viscosity.
Drain oil and fill with oil of lower viscosity. Refer to LO 10-4320-318-12.
Step 2. Check if decompression lever is at position 2 (12 o’clock position).
3. ENGINE LACKS POWER; BLACK SMOKE FROM EXHAUST.
Check for dirty air filter.
Change air filter if necessary (para. 3-5).
4. ENGINE LACKS POWER; NO SMOKE FROM EXHAUST.
Step 1. Check that speed control lever stayed in the RUN position.
If necessary, tighten nut that retains speed control lever.
Step 2. Check crankcase oil level.
Add or drain oil as necessary to normal level. Refer to LO 10-4320-318-12.
5. PUMP DISCHARGE LINE SHOWS LOW OR NO PRESSURE.
Step 1. Check for proper valve alignment in water system for pump unit.
Refer to system manual.
Step 2. Check for tight hose connections.
Replace seals, hoses, or couplings if necessary. Refer to system manual.
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