4-20
O-200-D & X Series Engine Installation and Operation Manual
3 January 2017
Engine Operation
4-5.2. Engine Operation in Hot Weather
“Hot weather” is defined as ambient temperature exceeding 90°F (32°C). After an engine
is shutdown, the temperature of various components will begin to stabilize. The hotter
parts such as cylinders and oil will cool, while other parts will begin to heat up due to lack
of air flow or heat convection from those engine parts that are cooling. At some point
following engine shutdown, the entire unit will stabilize near the ambient temperature.
This time period will be determined by temperature and wind conditions and may take
several hours.
Heat soaking occurs between 30 minutes to one hour following shutdown. During this
time, the fuel will warm causing the fuel in the carburetor bowl to “boil” or vaporize.
During subsequent starting attempts, the carburetor may ingest a combination of fuel and
fuel vapor. Until the entire fuel system becomes filled with liquid fuel, difficult starting
and unstable engine operation can be expected.
Hot weather operation situations requiring special instructions are:
•
“Cooling an Engine in Hot Weather” (Section 4-5.2.1)
•
“Take-off and Initial Climb Out in Hot Weather” (Section 4-5.2.3)
Ensure the engine is serviced with the correct viscosity oil specified in Chapter 3 of the
Standard Practice Maintenance Manual prior to starting the engine. Service the oil sump,
as required, to maintain the oil capacity found in Section 2-4, titled “Engine
Specifications”.
Operating Tips
•
Inspect the induction air filter frequently for contamination; be prepared to clean or
replace it, if necessary.
•
If the aircraft is flown in dusty conditions, Continental Motors recommends more
frequent oil changes.
•
Use dust covers over openings in the cowling for additional protection.
4-5.2.1. Cooling an Engine in Hot Weather
•
Reduce ground operation to a minimum to keep engine temperatures down.
•
Open cowl flaps fully while taxiing.
•
Face the nose of aircraft into the wind to take advantage of the cooling effect.
Summary of Contents for O-200-D
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