Piper COMANCHE PA-24-180 Service Manual page 416

FIGURE 7B-6. IDLE SPEED AND MIXTURE ADJUSTMENT (FUEL INJECTOR)
7B-31 Adjustment Of Throttle And Mixture Controls. The throttle and mixture controls are adjusted so
that when the throttle arm on the inFector is rotated forward against its full throttle stop and the mixture
arm is rotated forward against its full rich stop. their respective cockpit controls should be 062 ol an inch
in from their full forward stops
a
At the injector. disconnect the throttle and or mixture control cable end from its control arm
b
Loosen the jam nut securing the cable end.
c Adjust the linkage b! rotating the cable end to obtain the 062 of an inch spring back of the
cockpit control le\er when the throttle or mixture control arm contacts its stop
d Reconnect the cable end to its control arm and secure jam nut.
e
Pull the throttle and mixture controls in the cockpit full aft to ascertain that the injector idle
screw contacts its stop and the mixture control arm contacts its lean position.
7B-32 Adjustment Of Idle Speed And Mixture. (Refer to Figure 7B-6.)
a Start the engine and warm up in the usual manner until oil and cylinder head temperatures are
normal
b
Check magnetos If the "mag-drop" is normal. proceed with idle adiustment
c Close the throttle to idle If the RPM changesappreciablyaftermakingthe idle mixturead ustment
during the succeeding steps. readjust the idle speed to the desired RPM
ISSUED: 8/18/72
2F10
POWER PL
PIPER COMANCHE SERVICE MANUAL