Piper PA-24 Comanche Service Manual page 348

POWER PLANT
ISSUED:
8/18n2
1A·21. AdjlllallGlt Of
PropcUcr
GoVaDor.
(H8acU) (R.efer to Fiprc 7A-6.)
a.
R.elease the fucasen and
lift the
left side cqiDe cowlin,.
b. Start me qine in accord&acc with the directions pven in the Owner's Flitht Manual and allow to
warmup.
c. Push the "PROPELLER" cockpit contrOl as fu forward as it will
go.
At this position the iovemor
spccd adjustin, contrOllcver will be apinst the hiorpm fmc adjustin,
S(ftW.
d. ObSC1'\'e enJine
speed.
Adjust the
JOvernor by means of the fmc adjusanent screw for 257' RPM
(PA'2~Z'O)
or 2700 RPM
(PA·2~Z60). To do Ibis.looten the fmc adjustment screw locknut and
turn
the
hi-rpm fmc adjustment screw in a dockwilc direction to
accreue
enJine speed and a cOWlterdockwise
rotation to increase eftline speed. Oae revolution of the fmc adjustment screw incrusa or decreases the
propeller spccd approximately 15
RPM..
e. After scning the JOvcmor for hiJh
RPM,
run the self-iockinJ nut OD the fine adjusanent screw
apinst the base projection to lock.
f. Pull the
"PROPELLE~"
cockpit cOlltrOl aft to the low RPM position.
I. Observe encillC speed. Set to 1900 RPM (PA·Z4-250) or 1600 RPM (PA,Z"Z60) either by
thradins the fittinl at the JOYemor conuol arm onto the able. or by rumiftt it in the direction tending to
remove the fitting from the able. depcndiftJ on whether it is
required.
to decrease or increase engine speed.
respectively. It will be necessary. of
COUl"SC.
prior to a.djustinl.
to
remove the self·locking nut and
disconnect it from the governor cnnuol ann and to release the
fittint
locknut.
h. Reconnect cable to governor conuol ann. apply fieri", locknut
~d
recheck engtne by moving
cockpit control in and out of the appropriate settinl.
I.
Secure the cowling.
A' "
PIPER COMANCHE SERVICE MANUAL
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8
FIGURE 7A·5. WOODWARD PROPELLER GOVERNOR ADJUSTMENT POINTS
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