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TM 5-1940-277-10
TM 1940-10/1
a.
Engine Coolant Warning Lights (1 and 4) Glow orange when the temperature of the fresh water engine
cooling system on the MK1 or the primary engine cooling system on the MK2 rises to an unacceptable
level. Number 1 is connected to the port engine and number 4 is connected to the starboard engine.
b.
Coolant Temperature Gauge (2 and 3) Indicates the temperature in degrees Fahrenheit and Celsius of the
fresh water engine cooling system on the MK1 and of the primary engine cooling system on the MK2.
Number 2 is connected to the port engine and number 3 to the starboard engine.
c.
Emergency Link Warning Light (5) Glows red when the emergency link switch on auxiliary switch panel
no. 1 is turned on.
d.
Instrument Light Switch (6) A switch which controls the gage lights. Center position turns gauge lights off.
Down position turns gauge lights on bright. Up position turns gauge lights on dim.
e.
Bilge Water Warning Lights (7 and 8) Located above the instrument light switch. These lights glow green
when accumulated water in the bilge reaches a level that requires pumping out. Number 7 indicates water
level in the hydrojet compartment and number 8 indicates water level in the engine compartment.
f.
Low Fuel Warning Light (9) Glows red when there is 12 gallons (45 liters) or less fuel remaining in the fuel
tank.
g.
Engine Low Oil Pressure Warning Light (10 and 13) Glows amber when the oil pressure in the engine is
unacceptably low. Number 10 is connected to the port engine and number 13 is connected to the
starboard engine.
h.
Engine Oil Pressure Gauge (11 and12 ) Indicates the oil pressure of the engine in pounds force per square
inch (Ibf/in2) and kilopascals per square centimeter (Kp/cm2). Number 11 is connected to the port engine
and number 12 is connected to the starboard engine.
i.
Alternator Warning Light (14 and 25) Glows red when the alternator on the engine is not working.
Number 14 is connected to the starboard engine and number 25 is connected to the port engine.
j.
Battery Condition Meter (15 and 24) Indicates the state of charge in volts of the batteries. Number 15 is
connected to the two batteries on the starboard side and number 24 is connected to the two batteries on
the port side.
k.
Engine Circuit Switch (16 and 21) Turns on the engine circuits. Up position is OFF, down position is ON.
I.
Starter Switch (17 and 22) When pressed the switch activates the starting motor to start the engine. Switch
functions as long as it is pressed. Number 21 is for the port engine and number 17 is for the starboard
engine.
m.
Heat Switch (18 and 23) When pressed the switch activates the thermostat unit used for engine starting at
temperatures below 50F (10C). Switch functions as long as it is pressed. Number 23 is for the port
thermostat unit and number 18 is for the starboard thermostat unit.
n.
Tachometer (19 and 20) Indicates the speed of the engine crankshaft in rpm. Actual speed is scale reading
times 100. Number 19 is for the starboard engine and number 20 is for the port engine.
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