Piper ARCHER III - Engine Controls; Fuel System

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7.11 ENGINE CONTROLS

Engine controls consist of a throttle control and a mixture control lever.

These controls are located on the control quadrant on the lower center of the

instrument panel (Figure 7-5) where they are accessible to both the pilot and

the copilot. The controls utilize teflon-lined control cables to reduce friction

and binding.

The throttle lever is used to adjust engine RPM. The mixture control

lever is used to adjust the air to fuel ratio. The engine is shut down by the

placing of the mixture control lever in the full lean position. For information

on the leaning procedure, see Section 4 of this Handbook.

The friction adjustment lever on the right side of the control quadrant may

be adjusted to increase or decrease the friction holding the throttle and mixture

controls or to lock the controls in a selected position.

The carburetor heat control lever is located to the right of the control

quadrant on the instrument panel. The control is placarded with two

positions: ``ON’’ (down), ``OFF’’ (up).

7.13 FUEL SYSTEM

Fuel is stored in two twenty-five gallon (24 gallons usable) tanks which

are secured to the leading edge structure of each wing by screws and nut

plates. Each tank is equipped with a filler neck indicator tab to aid in deter-

mining fuel remaining when the tanks are not full. Usable capacity to the

bottom of the indicator tab is 17 gallons.

The fuel selector control (Figure 7-7) is located on the left side-panel,

forward of the pilot’s seat. The button on the selector cover must be

depressed and held while the handle is moved to the OFF position. The

button releases automatically when the handle is moved back into the ON

position.

An auxiliary electric fuel pump is provided in case of failure of the

engine driven pump. The electric pump should be on for all takeoffs and

landings, and when switching tanks. The pump switch is located in the switch

panel above the throttle quadrant.