SECTION 4 CESSNA
NORMAL PROCEDURES MODEL T182T NAV III
GFC 700 AFCS
U.S.
CRUISE (Continued)
FUEL VAPOR PROCEDURES
The engine fuel system can cause fuel vapor formation on the ground
during warm weather. This will generally occur when the outside
ambient air temperature is above 80°F. Vapor formation may increase
when the engine fuel flows are lower at idle and taxi engine speeds.
The following procedures are recommended when engine idle speed
and fuel flow fluctuations show that fuel vapor may be present:
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. In addition to the above procedures, the auxiliary fuel pump may
be turned ON with the mixture adjusted as required to aid vapor
suppression during ground operations. The auxiliary fuel pump
should be turned OFF prior to takeoff.
5. Just prior to TAKEOFF, advance the throttle to 32 in.hg. for
approximately 10 seconds to verify smooth engine operation for
takeoff.
When the engine is operated above 1800 RPM, the
resulting increased fuel flow results in lower fuel
temperatures throughout the engine fuel system. This
increased flow purges the fuel vapor and the cooler fuel
minimizes vapor formation.
(Continued Next Page)
T182TPHBUS-00
4-40
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