Continental Refrigerator IO-240-A, Installation And Operation Manual, Page: 106 / 146

4-24 IO-240 Series Engine Installation & Operation Manual
31 October 2011
Engine Operation
NOTE: The use of an approved thermal blanket or cover will help reduce
the effects of wind and cold air circulation when the aircraft is not stored
in a hangar. The preheating system manufacturer should have thermal
blankets available.
3. Start the engine immediately after completion of the preheating process using the
normal start procedure in Section 4-3.2.
CAUTION: If oil pressure is not indicated within 30 seconds, shut
down the engine and determine the cause. Operating the engine
without oil pressure may result in engine damage.
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Do not close the cowl flaps in an attempt to hasten engine warm-up.
4. Operate the engine at 1000 RPM until some oil temperature is indicated.
a. Monitor the oil pressure closely. If necessary, retard the throttle to maintain oil
pressure below 100 psi. If oil pressure is less than 30 psi, or cannot be maintained
below 100 psi, shut the engine down and repeat the preheat process. Do not close
the cowl flaps to facilitate engine warm-up.
b. Monitor the oil temperature until it reaches at least 75° F (24° C).
CAUTION: Do not operate the engine at speeds above 1700 RPM
unless the oil temperature is at least 75° F (24° C) and the oil
pressure is between 30 to 60 psi.
5. Run the engine up to 1700 RPM; approach this RPM in increments to prevent oil
pressure from exceeding 100 psi.
WARNING
Operating the engine above 1700 RPM before reaching the
minimum oil temperature may result in engine malfunction,
engine failure, injury or death.
CAUTION: Continually monitor oil pressure during run up.
6. When oil temperature has reached 100° F (38° C) and oil pressure does not exceed
60 psi at 2500 RPM, the engine has been warmed sufficiently to accept full rated
power.