Figure 8-34. Idle Speed and Mixture Adjustment Points
b. Exhaust Bypass Check: Ascertain that the exhaust bypass adjusting screw has from eight to nine
threads showing below the jam nut. This screw is preset at the factory and should not require any
adjustment, unless it is known that critical altitude is not correct; in this case, use procedure given in
Step k. (Refer to Figure 8-36.)
c.
Idle Performance Check:
NOTE
It is extremely important that the engine be thoroughly warmed up.
H o w e v e r, excessive engine temperatures must be avoided since setup
temperature must closely parallel temperatures in flight.
1. Remove the cap from the tee fitting on the right side of the throttle body. (Refer to Figure 8-34.)
2. Install a 0-60 psig calibrated pressure gauge (vented to the atmosphere) to the tee, using a suitable
length of flexible tube. The gauge should always be at the same lever as the fuel manifold valve
when checking fuel pressure.
3. Purge the air from the tube.
CAUTION
During all engine operations outlined in these instructions, exercise
CAUTION to avoid harm or damage to personnel and equipment by
propeller blast and rotating propeller blades.
Revised: 8/31/77
2C6
CHEROKEE ARROW III SERVICE MANUAL
POWER PLANT - CONTINENTAL
Summary of Contents for ARROW III
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