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 TM 55-1905-220-14-8
4-5. GENERAL (Continued).
Table 4-2. Portable Fire Pump (P-250) Carburetion Troubleshooting (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. Poor carburetion.
Step 1. Jets, needle valves, fuel lines, and filter obstructed.
Clean.
Step 2. Loose mounting or defective gasket between carburetor and crankcase.
Tighten bolts or replace gasket, if required.
Step 3. Faulty or gummed check valve.
Refer to paragraph 4-7.2.
Step 4. Dirty under leaf valve.
Clean leaf valve, refer to paragraph 4-7.2.
Step 5. Broken or damaged leaf valve.
Replace leaf, refer to paragraph 4-7.2.
4-15
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