Cessna 1973 172 - Oil Pressure

(8) Oil Pressure-- Check.
Without Preheat:
(1) Prime the engine six to ten strokes while the propeller
is being tvu-ned by hand with throttle closed. Leave primer
charged and ready for stroke.
(2) Propeller Area -- Clear.
(3) Master Switch — ON
(4) Mixture -- Full rich.
(5) Ignition Switch -- START.
(6) Pump throttle rapidly to full open twice. Return to 1/8"
open position.
(7) Release ignition switch to BOTH when engine starts.
(8) Continue to prime engine until it is running smoothly, or
alternately pump throttle rapidly over first 1/4 to total travel.
(9) Oil PressureCheck.
(10) Pull carburetor heat knob full on after engine has started.
Leave on until engine is running smoothly.
(11) Lock Primer.
NOTE
If the engine does not start during the first few attempts,
or if engine firing diminishes in strength, it is probable
that the spark plugs have been frosted over. Preheat
must be used before another start is attempted.
IMPORTANT
Pumping the throttle may cause raw fuel to accumulate in
the intake air duct, creating a fire hazard in the event of
a backfire. If this occurs, maintain a cranking action to
suck flames into the engine. An outside attendant with a
fire extinguisher is advised for cold starts without pre-
heat.
Diu-ing cold weather operations, no indication will be apparent on the
oil temperature gage prior to take-off if outside air temperatures are
very cold. After a suitable warm-up period (2 to 5 minutes at 1000 RPM),
accelerate the engine several times to higher engine RPM. If the engine
accelerates smoothly and the oil pressure remains normal and steady, the
aircraft is ready for take-off.
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