Cessna 152 1979, Pilot Operating Handbook

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CESSNA SECTION 4
MODEL 152 NORMAL PROCEDURES
1 July 1978 4- 11
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 temperatures 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 brakes be held to a minimum and that all
controls be utilized (see Taxiing Diagram, figure 4-2) to maintain directional control and
balance.