Cessna 182T 2001, Pilot Operating Handbook

Page: 108 / 254

SECTION 4 - NORMAL PROCEDURES CESSNA
FAA APPROVED MODEL 182T
3. Adjust the mixture at any altitude for RECOMMENDED LEAN
or BEST ECONOMY fuel flows when using 80% or less
power.
Using the above recommended procedures can provide fuel
savings in excess of 5% when compared to typical operations at full
rich mixture. In addition, the above procedures will minimize spark
plug fouling since the reduction in fuel consumption results in a
proportional reduction in tetraethyl lead passing through the engine.
FUEL VAPOR PROCEDURES
The engine fuel system can become susceptible to fuel vapor
formation on the ground during warm weather. This will generally
occur when the outside ambient air temperature is above 80°F.
The situation is further aggravated by the fact that the engine fuel
flows are lower at idle and taxi engine speeds. When vapor occurs
as evidenced by idle engine speed and fuel flow fluctuations, the
following procedures are recommended.
1. With the mixture full rich, set the throttle at 1800 RPM to 2000
RPM. Maintain this power setting for 1 to 2 minutes or until
smooth engine operation returns.
2. Retard the throttle to idle to verify normal engine operation.
3. Advance the throttle to 1200 RPM and lean the mixture as
described under FUEL SAVINGS PROCEDURES FOR
NORMAL OPERATIONS.
4. Just prior to TAKEOFF, apply full throttle, for approximately 10
seconds to verify smooth engine operation for takeoff.
NOTE
When the engine is operated above 1800 RPM, the
resulting increased fuel flow also makes for lower fuel
temperatures throughout the engine fuel system. This
increased flow purges the fuel vapor and the cooler fuel
minimizes vapor formation.
4-28 Apr 30/01