Leaning For Ground Operations; Taxiing - Cessna 172S Nav III Information Manual

CESSNA SECTION 4
MODEL 172S NAV III NORMAL PROCEDURES
LEANING FOR GROUND OPERATIONS
For all ground operations, after starting the engine and when the
engine is running smoothly:
1. Set the Throttle Control to 1200 RPM.
2. Lean the mixture for maximum RPM.
3. Set the Throttle Control to an RPM appropriate for ground
operations (800 to 1000 RPM recommended).
NOTE
If ground operation will be required after the
BEFORE TAKEOFF checklist is completed, lean the
mixture again (as described above) until ready for
the TAKEOFF checklist.
TAXIING
When taxiing, it is important that speed and use of brakes be held to
a minimum and that all controls be utilized (Refer to Figure 4-2,
Taxiing Diagram) to maintain directional control and balance.
Taxiing over loose gravel or cinders should be done at low engine
speed to avoid abrasion and stone damage to the propeller tips.
NOTE
The LOW VOLTS annunciator may come on when
the engine is operated at low RPM with a high load
on the electrical system. If this is the case, the LOW
VOLTS annunciator will go off when the engine is
run at higher RPM to provide greater alternator
system output. Verify that the M BATT AMPS
indication shows positive (charging) current at the
higher RPM.
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172SPHAUS-03 U.S. 4-27