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 TM 55-1905-219-14-8
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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