Lycoming O-235 series, Operator'S Manual

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LYCOMING OPERATOR’S MANUAL SECTION 3
O-235 AND O-290 SERIES OPERATING INSTRUCTIONS
OPERATING CONDITIONS
Oil Pressure, psi –
Model Maximum Minimum Idling Start and Warm-Up
O-235 –C, -E, -F, -G, -H2C, -J,
-K, -M
90 60 25 100
O-235-B 90 60 15 100
O-235-L*, -N 90 60 15 115
O-235-P 90 55 15 115
O-290-D 85 60 25
O-290-D2 90 60 25 100
* - Front of engine 90 50 15
Fuel Pressure, psi –
Model Maximum Desired Minimum
All O-235 models, O-290-D2 8 3 0.5
O-290-D 5 3 0.5
Average Ambient Air Oil Inlet Temperature
Temperature Desired Maximum
Above 60°F (15.5°C) 180°F (82°C) 245°F (118°C)
30°F (-1.11°C) to 90°F (32.2°C) 180°F (82°C) 245°F (118°C)
0°F (-17.8°C) to 70°F (21.1°C) 170°F (77°C) 245°F (118°C)
Below 10°F (-12.2°C) 160°F (71°C) 245°F (118°C)
Engine oil temperatures should not be below 140°F (60°C) during continuous operation.
O-235-C, -E
Operation RPM HP
Fuel
Cons.
Gal./Hr.
Max.
Oil Cons.
Qts./Hr.
*Max.
Cyl. Head
Temp.
Normal Rated 2800 115 10.7 0.52 500°F (260°C)
Performance Cruise
(75% Rated) 2350 86 7.3 0.29 500°F (260°C)
Economy Cruise
(65% Rated) 2250 75 5.8 0.25 500°F (260°C)
* - At Bayonet Location – For maximum service life of the engine, maintain cylinder head temperatures
between 150°F (65°C) and 400°F (204°C) during continuous operation.
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