GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 7
MODEL GA‐7/COUGAR
AIRPLANE & SYSTEMS DESCRIPTIONS
7‐19
Issued: April 10, 1978
FUEL QUANTITY INDICATORS
Fuel quantity is measured by two electrically operated fuel quantity indicators located on the right portion of the
instrument panel. The indicators are actuated individually by two fuel quantity transmitters installed in the
inboard and outboard ends of each fuel bay. The transmitters consist of a float attached to a pivoted rod, one end
of which is a rheostat wiper. Changes in fuel level causes angular travel of the float which increases or decreases
the amount of resistance in the circuit. This regulates the amount of needle deflection at the indicator, to indicate
fuel quantity.
ENGINE FUEL PRIMER
Primer solenoid valves are located between the fuel selector valves and the engine primer lines. A spring loaded
toggle switch, located on the lower left side of the instrument panel, when activated turns on the corresponding
auxiliary fuel pump and opens the corresponding solenoid valves.
