19. Discharge Pressure Gage
The discharge pressure gage (9, fig. 11) is located at the
lower right of the instrument panel. It indicates pressures
on the discharge side of the pump. Normal gage readings
are from 0 to 300 psi.
20. Magneto Switch
The magneto switch (10, fig. 11) is located at the lower
center of the instrument panel. When pulled out it closes
the magneto circuit. Pull out before starting the engine.
Push in to shut off the engine.
21. Starter Button
The starter button (11, fig. 11) is located at the lower
center of the instrument panel. When depressed, it
completes a circuit that actuates the starter solenoid.
W hen the starter solenoid is closed, a circuit from the
batteries to the starting motor is completed, and the
starting motor cranks the engine. Both solenoid and
starting motor circuits are broken when the starter button
22. Intake Pressure Gage
The intake pressure gage (13, fig. 11) is located at the
Engine oil pressure
lower left of the instrument panel.
It indicates the
gage and safety
pressure or vacuum at the intake side of the pump.
2. Battery disconnect
Normal readings are from 30 inches of mercury vacuum
Fuel primer pump
to 100 psi pressure.
3. Engine water temper-
ature gage and safety9.
Discharge pressure gage
23. Choke Control
The choke control (12, fig. 11) is located at the center of
5. Throttle control
the instrument panel. It is mechanically connected to the
G Reset button
Intake pressure gage
carburetor choke lever. The choke is fully closed when
Safety bypass switch
the choke control knob is pulled out as far as it will go; the
choke is open when the knob is pushed in as far as it will
go. Close the choke to facilitate starting a cold engine.
Figure 11. Controls and instruments.
As the engine temperature rises, operate the choke to the
open position until it is fully opened when engine
means of adjusting engine speed. Pushing the lever to temperature rises to normal.
the full-in position produces full speed. Pulling the lever
to full-out position produces idle speed.
24. Battery Disconnect Switch
18. Fuel Primer Pump Handle
The battery disconnect switch (2, fig. 11) is located at the
left center of the instrument panel. When opened, it
The fuel primer pump handle (8, fig. 11) is located at the breaks the circuit between the batteries and the starting
right side of the instrument panel. It operates the primer motor. The switch must be in the ON position when the
pump used to pump gasoline into the intake manifold for pumping unit is being started or is operating.
cold weather starting. When ambient temperatures are
below freezing, pump the handle five or six times before 24.1. Liquid Level Gage
starting. Leave the handle in full-in position while the
pumping unit is operating.
The liquid level gage (7, fig. 2) is located in the fuel tank
(6). It indicates the level of the fuel in the tank.