Piper PA-24 Comanche Service Manual page 432

PIPER COMANCHE SERVICE MANUAL
TAIL! VlIJS.U•. TROUILESHoonNG ClART
(ENGINE) (CODt)
Trouble
c.au.
Remedy
Low power and uneven Leak in maDuold
llise.
TehteD fiftinp.
runnin!l. (cont.) Leak in iaduaion sysum. Tighten all
COnucUOIlS.
Replace defective pans.
Poor fuc!. F ill tank with fuel of
recommended pde.
MqnetO
breaker poina Clwa poiaa. Check inmnal
not worlcin, properly.
timint
of mapctos.
Defective ipition
w1rc.
Check wire with electric
tester. Replace defective
wire.
Improper ipition
timiIII.
Check
maplClOS
for timiOl
aDd synchronization.
Defective
spade
piq Replace connecton on spark
termiDal conneeton.
plua wire.
Incorrea valve dean.nce.
Adjust. valve cieuance by
chanp. push rods.
Flow meter reads high. Cloged nonle. Remove and flush with acetone.
Blow through orifice with
compressed
aU•
100 psi.
Failure of engine to
Throttle lever nut OUt of Adjust throttle lever.
develop full power. adjustment.
Leak
in
induction system.
Tilhten intake pipe mounting
flanse nuts and tighten
inuJc.e manifold.
Mixture too Ian.
Injector mult be reealibrated,
Throale linkaplimicint
Check throttle
link.
and
travel of throttle valve. throttle valve opening.
Restrictions in inlet &if Examine aU scoop and
scoop. remove resttiCtions.
Improper fuel. Fill tank with recommended
aviation fuel.
Faulty ignition. Tighten all connections.
Check system with tester.
Check ignition timing.
Rough engine.
Cracked encine mount.
Replace mount.
Unbalanced propeller. Remove propeUer Uld lave
it checked for balance:.
Dde:ctlVC mounting Insull new mounting
busbints. bushings.
POWER PLANT
ISSUED: 8/18/72
2
G4
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