LYCOMING OPERATOR’S MANUAL SECTION 3
O-235 AND O-290 SERIES OPERATING INSTRUCTIONS
OPERATING CONDITIONS (CONT.)
O-235-N, -P Series
Operation
RPM
HP
Fuel
Cons.
Gal./Hr.
Max.
Oil Cons.
Qts./Hr.
Max.
Cyl. Head
Temp.
Take-Off 2800 116 ---- ---- 500°F (260°C)
Normal Rated 2550 108 9.2 0.36 500°F (260°C)
Performance Cruise
(75% Rated) 2300 81 6.2 0.27 500°F (260°C)
Economy Cruise
(65% Rated) 2200 70 5.3 0.23 500°F (260°C)
O-290-D Series
Operation
RPM
HP
Fuel
Cons.
Gal./Hr.
Max.
Oil Cons.
Qts./Hr.
*Max.
Cyl. Head
Temp.
Take-Off 2800 130 ---- ---- 500°F (260°C)
Normal Rated 2600 125 11.9 0.56 500°F (260°C)
Performance Cruise
(75% Rated) 2350 94 7.5 0.31 500°F (260°C)
Economy Cruise
(65% Rated) 2250 81 6.5 0.27 500°F (260°C)
O-290-D2 Series
Operation
RPM
HP
Fuel
Cons.
Gal./Hr.
Max.
Oil Cons.
Qts./Hr.
*Max.
Cyl. Head
Temp.
Take-Off 2800 140 ---- ---- 500°F (260°C)
Normal Rated 2600 135 12.6 0.60 500°F (260°C)
Performance Cruise
(75% Rated) 2350 101 7.2 0.34 500°F (260°C)
Economy Cruise
(65% Rated) 2200 87 6.3 0.29 500°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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