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check. Adjust the mixture
controls.
Engine will not cutoff. Mixture controls not correctly
adjusted.
Do a range of movement
check. Adjust the mixture
controls.
Cannot control the engine. Broken throttle bowden cable. Replace the broken bowden
cable.
Throttle control not set correctly. Do a range of movement
check. Adjust the throttle
controls.
Bowden cable not free to move. Replace the bowden cable.
Throttle lever hard to move Friction adjuster incorrectly set.. Check/adjust friction adjuster.
Throttle control lever restriction. Remove the restriction.
Engine does not get to
Maximum RPM.
Throttle controls not adjusted
correctly.
Do a range of movement
check. Adjust the throttle
controls.
Idle RPM changes each time
idle is set.
No bounce in the throttle control
at idle.
Do a range of movement
check. Adjust the throttle
controls.
Engine Controls
DA20-C1 AMM
Page 102
24 Mar 1999 76-00-00 Doc # DA201-C1
Rev. 1
Figure 2: Throttle Control Installation
DA20-C1 AMM
Engine Controls
Doc # DA201-C1
Rev. 10 76-00-00 Page 201
23 Jun 2004
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove and install the bowden cables for the engine
power controls. They also tell you how to adjust the bowden cables. They do not tell you how to
adjust the engine fuel control units.
Refer to the IO-240-B Teledyne Continental Motors Maintenance Manual for data on the engine fuel
control units.
WARNING: DO ALL THE STEPS OF THE CONTROL INSTALLATION AND
ADJUSTMENT CAREFULLY. ENGINE FAILURE CAN OCCUR IF THE
CONTROL INSTALLATION AND ADJUSTMENT ARE NOT DONE
CORRECTLY. THIS CAN CAUSE DEATH OR INJURY TO PERSONS.
2. Remove/Install The Throttle Bowden Cable
A. Remove The Throttle Bowden Cable
Detail Steps/Work Items Key Items
WARNING: DO NOT STAND WITHIN THE DANGER AREA OF THE
PROPELLER. IF THE ENGINE STARTS, THE PROPELLER CAN
CAUSE DEATH OR INJURY TO PERSONS.
WARNING: YOU MUST MAKE SURE THAT THE ENGINE IS SAFE BEFORE
YOU DO WORK ON THE ENGINE CONTROLS. DISCONNECT THE
SPARK PLUG LEADS. MAKE SURE THAT :
- THE IGNITION SWITCH IS IN THE “OFF” POSITION.
- THE “P” LEADS ARE GROUNDED.
- THE THROTTLE IS SET TO “IDLE”.
- THE MIXTURE CONTROL IS SET TO “LEAN CUT-OFF”.
(1) Remove the engine cowlings. Refer to Chapter 71-10.
(2) Disconnect the airplane battery. Refer to Chapter 24-31.
Engine Controls
DA20-C1 AMM
Page 202
24 Mar 1999 76-00-00 Doc # DA201-C1
Rev.1
Detail Steps/Work Items Key Items
(3) Make the engine safe:
− Disconnect the spark plug leads.
− Make sure that the ignition switch is set
to “OFF” position.
− Make sure the “P” leads are grounded.
− Set the throttle to IDLE.
− Mixture control set to LEAN CUT-OFF.
(4) Disconnect the throttle eye-end at the engine
throttle lever:
− Remove the nut, bolt and three washers
from the bowden-cable eye-end.
Refer to Figure 2.
(5) Remove the eye-end from the bowden cable:
− Loosen the adjustment nut and remove
the eye-end.
(6) Remove the bowden cable from the support
bracket at the top of the engine:
− Remove the forward nut from the
bowden cable.
− Move the bowden cable clear of the
bracket.
− Remove the rear nut from the bowden
cable.
(7) Remove the P-clamp which attaches the
bowden cable to the engine mounting frame.
(8) Carefully pull the bowden cable through the
rubber grommet at the aft baffle.
(9) Remove the fire resistant sealant from the
bowden cable at the firewall.
(10) Remove the instrument panel cover. Refer to Chapter 25-10
(11) Remove the feed-thru from the engine side
of the firewall.
DA20-C1 AMM
Engine Controls
Doc # DA201-C1
Rev. 1 76-00-00 Page 203
24 Mar 1999
Detail Steps/Work Items Key Items
(12) Remove the control knobs from these levers
at the center console:
− PARKING BRAKE.
− HEAT control ON OFF.
− HEAT distribution DEFROST FLOOR
(13) Remove the 2 parts of the engine controls
face plate from the center console cover.
− Remove the four screws.
(14) Disconnect and remove the TRIM switch
from the face plate.
Disconnect the connector below the face
plate. Lever the TRIM switch clear.
(15) Remove the center console cover from the
center console:
− Remove the six screws from the two
　
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