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6.
Before takeoff, run up the engine to 1700 RPM. If necessary,
approach this RPM in increments to prevent oil pressure from
exceeding 100 p.s.i. At 1700 RPM, adjust the propeller control to
"Full Decrease RPM" until minimum governing RPM is observed,
then return the control to "Full Increase RPM ". Repeat this
procedure three or four times to circulate warm oil into the
propeller dome. If the aircraft manufacturer recommends checking
the propeller feathering system, move the control to the "Feather"
position but do not allow the R PM to drop more than 300 below
minimum governing speed.,
NOTE ... Continually monitor oil pressure during run-up.
7.
Check magnetos in the normal manner. "
8.
When the oil temperature has reached 100°
F.
and oil pressure
does not exceed 80 p.s.i. at 1700 RPM, the engine has been warmed
sufficiently to accept full rated power.
CAUTION . .. Do not close cowl [laps in an allempt to hasten
engine warm-lip.
NOTE ... Fuel flow will likely be on the high limit; however, this is
normal and desirable since the engine will be developing more
horsepower at substandard ambient temperatures.
If preheat is not used, employ the following start procedures:
I.
Fuel Selector - Main tank or as instructed by aircraft manu-
facturer.
2.
Battery Switch - On.
3.
Mixture - Rich.
4.
Throttle - Open.
5.
Primer - Operate until fuel flow or fuel pressure shows maxi-
mum reading.
6-4
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