Cessna 152 - Page 51

CESSNA
MODEL 152
SECTION4
NORMAL PROCEDURES
AMPLIFIED PROCEDURES
STARTING ENGINE (Temperatures Above Freezing)
During engine starting, open the throttle approximately 1/2 inch. In
warm weather, one stroke of the primer should be sufficient. In tempera-
tures near freezing, up to 3 strokes of the primer may be necessary. As the
engine starts, slowly adjust the throttle as required for 1000 RPM or less.
NOTE
The carburetor used on this airplane does not have an
accelerator pump; therefore, pumping of the throttle must
be avoided during starting because doing so will only
cause excessive leaning. ·
Weak intermittent firing followed by puffs of black smoke from the
exhaust stack indicates overpriming or flooding. Excess fuel can be
cleared from the combustion chambers by the following procedure: set the
mixture control in the idle cut-off position, the throttle full open, and crank
the engine through several revolutions with the starter. Repeat the
starting procedure without any additional priming.
If the engine is underprimed (most likely in cold weather with a cold
engine) it will not fire at all, and additional priming will be necessary.
After starting, if the oil gage does not begin to show pressure within 30
seconds in the summertime and about twice that long in very cold weather,
stop the engine and investigate. Lack of oil pressure can cause serious
engine damage. After starting, avoid the use of carburetor heat unless
icing conditions prevail.
NOTE
Details concerning cold weather starting and operation at
temperatures below freezing may be found under Cold
Weather Operation paragraphs in this section.
TAXIING
When taxiing, it is important that speed and use of b:·akes be held to a
minimum and that all controls be utilized (see Taxiing Di:.gram, figure 4-
2)
to maintain directional control and balance.
1 July 1978
4-11