TM 5-3895-373-20REFERENCE INFORMATIONENGINE AND ENGINE LUBRICATION SYSTEMA blocked tank vent port in the fuel tank cap can set up avacuum in the fuel tank. A fuel tank vacuum pressurewill slow fuel flow to the pump and engine.Refer to paragraph 4.5 for fuel tank repair.A restricted air cleaner, air induction port, or exhaustpipe or muffler will cause a heavy black exhaust and highfuel usage.Among fuel system faults that can cause the engine tohave a low power output are:1. faulty fuel lift pump2. clogged/dirty fuel filter3. air in the fuel system4. blocked fuel feed line2-49
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business