Cessna 152 Fuel System

FUEL SYSTEM
Fuel is gravity fed from the metal wing tanks, through a shutoff valve and a fuel strainer, to the carburetor. Positive ventilation is provided by a vent line and a check valve assembly located in the left wing tank, a crossover line connecting the two tanks together, and a vented fuel cap on the right hand tank. The vent line from the check valve assembly extends overboard through the lower wing skin adjacent to the left wing strut. A fuel drain is located between the shutoff valve and the strainer
Fuel shutoff valve is a two-position ON-OFF valve, located in the floor area between the pilot and copilot seats. The handle is safety wired in the "ON" position with .018" diameter mild steel wire (tag wire), which will break easily if the handle must be turned "OFF" in an emergency. The manufacturer recommends replacement instead of repair or damaged, worn or inoperative valves.
FUEL STRAINER: The fuel strainer is mounted at the firewall in the lower engine compartment. The strainer is equipped with a quick-drain valve which provides a means of draining trapped water and sediment from the fuel system. The quick-drain control is located adjacent to the oil dipstick and is accessible through the oil dipstick door
PRIMING SYSTEM: The priming system is comprised of a manually-operated pump located on the instrument panel and lines to all engine cylinders. Operation of the pump plunger forces fuel directly into the engine cylinders
VENTED FUEL FILLER CAP: The RIGHT-HAND fuel filler cap incorporates a vent and safety valve that provides both vacuum and positive pressure relief

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