TM 55-1930-209-14&P-17
c.
Voltmeter gauge is in right comer of engine instrument panel and indicates amount of charging from alternator
into battery or batteries selected with battery selector switch on aft edge of engine compartment. When alternator
ceases to provide a charge to the batteries, third light from the left in instrument warning light cluster glows red
and shows a battery symbol.
d.
Tachometer is in lower left comer of engine instrument panel and indicates engine rpm in 100's. Tachometer
indicates up to 5000 rpm and does not show a redline. Warm-up idle speed is normally between 900-1200 rpm.
Normal idle speed is about 600 rpm. Normal operating range, depending on load, sea conditions and propeller, is
between 1000 and 3800 rpm.
e.
Instrument warning light duster is right of tachometer and below oil pressure and voltmeter gauges and shows
four warnings. From left to right, these are; coolant temperature (shown with a thermometer), oil pressure (shown
with an oil can), battery charging (a battery) and glowplugs engaged (large, C-shaped arrow with wave in the
middle).
f.
Engine alarm buzzer test button is below instrument warning light duster. Push button to test buzzer. Buzzer
should sound. Alarm buzzer is below buzzer test button.
g.
Instrument light switch is also below instrument warning light cluster. Push to turn on instrument lights. Push to
turn off instrument lights.
2-10.12 Master switch. Master switch is on port side of operator's dashboard, facing the passageway from the front
entrance to the cabin. It has two positions, ON and OFF. Bilge pumps are not connected through the master switch and
must be turned off with bilge pump controls on the dash.
2-10.13 Ignition/electrical switch. This switch requires a key to operate. Switch has five positions (Figure 2-5):
a. O - Tums off all electrical circuits associated with engine (except bilge pumps)
b. R - Stops engine
c. 1 - Tums on engine accessories and instrument panel
d. 2 - Tums on engine glow plugs
e. 3 - Tums starter and starts engine
IGNITION/ELECTRICAL SWITCH
Figure 2-5. Ignition/Electrical Switch Operating Positions
2-9
