MOONEY INTERNATIONAL CORPORATION
M20V SERVICE AND MAINTENANCE MANUAL
Date
MAR 2017
Rev Date
Page
8
19. RUDDER TRIM SWITCH
Spring loaded momentary switch to position rud-
der into trimmed condition to reduce rudder pedal
forces during take off, climbs or descents. Right -
take off and climbs; Left - descents. Turning left
side of spring loaded switch trims r udder left,
turning right side of switch trims rudder right.
20. PITOT HEAT SWITCH
Pitot heat SWITCH turns on heating elements
within pitot tube. “PITOT HEAT” annunciation
light will illuminate “AMBER” only when f ailure
occurs.
21. ICE LIGHT SWITCH (if Equipped)
Lighting to alert the pilot of ice formation on sur-
faces of an aircraft.
22. READING LIGHTS SWITCH
Momentary switch o perates 4 overhead lamps in
3 modes. Reading Light Switch UP position, only
the Pilot reading light is activated. With Reading
Light Switch in Down position, ALL reading lights
are activated. Passenger switches are located in
theoverheadpanel.
23. DOME LIGHTS SWITCH
ON or OFF switch operates 1 main dome light in
the center of overhead console.
24. “HIGH BOOST” FUEL BOOST PUMP
SWITCH
The High Fuel boost pump switch operates the
fuel boost pump on high power. The high boost
setting is capable of operating engine a t reduced
power in case of engine driven fuel pump failure
or severe fuel filter blockage. Selecting High
Boost while Low Boost is powered on causes
Low Boost to turn off. Continuous operation
should be avoided except in an emergency. Nev-
er run the boost pump without fuel in the system.
-CAUTION-
PushingHIGHBOOSTpumpswitchON
when engine driven pump is operating prop-
erly will cause engine to quit due to exces-
sive rich fuel mixture.
25. BOOST PUMP SWITCH (LOW BOOST)
The Low Fuel boost pump switch operates the
fuel boost pump on low power to provide a means
of suppressing fuel vapor from fuel system during
hot day and high altitude conditions. Low boost
mayalsobeusedasanenginestartingaid.Con-
tinuous operation of the low boost is permitted.
Never run the boost pump without fuel in the sys-
tem.
-CAUTION-
Pushing LOW BOOST pump switch ON
when engine is operating properly at idle
conditions will cause engine to run rough or
quit due to excessive rich fuel mixture. For
this reason LOW BOOST should be turned
off except where prescribed in the normal
operating procedures.
26. AUTOPILOT POWER SWITCH
A manually operated rocker switch located on the
instrument panel. This switch will provide power
to the autopilot system and the Manual Electric
Trim (MET). There is another disconnect using
the MET and AP disconnect on the Pilot LH side
control yoke.
27. WING FLAP SWITCH
Flap switch, on lower instrument panel, operates
the electrically-actuatedwingflaps.Theflap
switch incorporates a pre-select feature for
TAKEOFF and FULL DOWN positions. Move
switch down to first détente position to obtain
TAKE OFF flaps (10). Move switch to full down
position to select FULL DOWN flaps (33). When
flap switch is moved UP to either TAKEOFF posi-
tion or FULL UP position the flaps will retract to
the selected position.
-CAUTION-
Positioning Flap Switch to the UP position
retracts t he flaps completely
28. PANEL LIGHT AND GLARESHIELD SWITCH
Momentary light switch UP position will illuminate
full strength or DOWN increases/decreases light
intensity for the instrument panel area.
29. THROTTLE CONTROL
Push throttle control forward to increase engine
power. Pull throttle aft to decrease engine power.
Vernier control is optional.
30. PROPELLER CONTROL
Push propeller control forward to increase en-
gine RPM; pull control aft to decrease engine
RPM. Control is a vernier type and fine adjust-
ments of RPM can be obtained by turning knob
clockwise to increase RPM and counter clock-
wise to decrease RPM. Knob should not be
turned IN any closer than .030” to .060” to panel
nut face.
31. MIXTURE CONTROL
Mixture control allows pilot to adjust the fuel- air
ratio (mixture) of the engine. Push control for-
39-10-00
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