SECTION I (Con't.)
a cold engine.
1-19 Throttle Control. The throttle control, (10-Fig.8), located on
the control panel, is a push-pull, twist lock control used to set the
governor for the desired engine rpm.
1-20 Ignition Switch. The ignition switch (4-Fig.9) is mounted in
the upper lefthand corner of the engine control panel. When placed
in the OFF position, the ignition switch grounds the magneto thus
stopping the engine.
In the ON position the magneto is ungrounded
and the fuel and oil reservoir level gages are energized.
1-21 Starter Switch.
The starter switch (3-Fig.9), mounted on the
engine control panels is a spring loaded, push-type switch.
pressed inward, it energizes the armature relay which in turn comp-
letes the electrical circuit between the battery and the starter.
1-22 Tachometer. The Tachometer (8-Fig.8), mounted on the test
stand control panel, is a needle-indicating, direct-reading instru-
ment graduated from 0 to 2500 rpm in increments of 50 rpm. The
tachometer indicates the engine rpm.
The normal operating speed is
approximately 2200 rpm.
1-23 Oil Pressure Gage.
The oil pressure gage (9-Fig.8), located
on the test stand control panel, is a needle-indicating, direct-read-
ing pressure actuated gage with the dial marked OFF, XX, and ON.
Normal oil pressure is indicated when the needle is between XX and
1-24 Ammeter. The Ammeter (6-Fig.8), mounted on the test stand
control panel, is a needle-indicating, direct-reading, electrically
actuated instrument. The dial is graduated in a 30-0-30 ampere scale.
The ammeter indicates the amount of current flowing to or from the
battery. With the engine in operation, the normal reading should be