Cessna 1973 172 - Hot Weather Operation; Flight Operations

FLIGHT OPERATIONS.
Take-off is made normally with carburetor heat off. Avoid excessive
leaning in cruise.
Carburetor heat may be used to overcome any occasional engine
roughness due to ice.
When operating in sub-zero temperature, avoid using partial carbu-
retor heat. Partial heat may increase the carburetor air temperature to
the 32° to 70°F range, where icing is critical under certain atmospheric
conditions.
Refer to Section VII for cold weather equipment.
HOT WEATHER OPERATION.
Refer to the general warm temperatiu-e starting information under
Starting Engine in this section. Avoid prolonged engine operation on the
ground.
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