SECTION 2 LYCOMING OPERATOR’S MANUAL
SPECIFICATIONS O-360 AND ASSOCIATED MODELS
SPECIFICATIONS (CONT.)
IO-360-B, -E, -F Series*
FAA Type Certificate ................................................................................................................................. 1E10
Rated horsepower...........................................................................................................................................180
Rated speed, RPM........................................................................................................................................2700
Bore, inches.................................................................................................................................................5.125
Stroke, inches..............................................................................................................................................4.375
Displacement, cubic inches.........................................................................................................................361.0
Compression ratio ....................................................................................................................................... 8.5:1
Firing order ............................................................................................................................................. 1-3-2-4
Spark occurs, degrees BTC..............................................................................................................................25
Valve rocker clearance (hydraulic tappets collapsed) ......................................................................... .028-.080
Propeller drive ratio ....................................................................................................................................... 1:1
Propeller driven rotation (viewed from rear) ......................................................................................Clockwise
* - IO-360-B1C only is rated at 177 HP.
AIO-360-A, -B Series
FAA Type Certificate ................................................................................................................................. 1E10
Rated horsepower...........................................................................................................................................200
Rated speed, RPM........................................................................................................................................2700
Bore, inches.................................................................................................................................................5.125
Stroke, inches..............................................................................................................................................4.375
Displacement, cubic inches.........................................................................................................................361.0
Compression ratio ....................................................................................................................................... 8.7:1
Firing order ............................................................................................................................................. 1-3-2-4
Spark occurs, degrees BTC..........................................................................................................................25**
Valve rocker clearance (hydraulic tappets collapsed) ......................................................................... .028-.080
Propeller drive ratio ....................................................................................................................................... 1:1
Propeller driven rotation (viewed from rear) ......................................................................................Clockwise
** - See Note Page 2-3.
HIO-360-A, -B Series
FAA Type Certificate ................................................................................................................................. 1E10
Rated horsepower.........................................................................................................................................180*
Rated speed, RPM........................................................................................................................................2900
Bore, inches.................................................................................................................................................5.125
Stroke, inches..............................................................................................................................................4.375
Displacement, cubic inches.........................................................................................................................361.0
Compression ratio, -A series....................................................................................................................... 8.7:1
Compression ratio, -B series ....................................................................................................................... 8.5:1
Firing order ............................................................................................................................................. 1-3-2-4
Spark occurs, degrees BTC..............................................................................................................................25
Valve rocker clearance (hydraulic tappets collapsed) ......................................................................... .028-.080
Propeller drive ratio ....................................................................................................................................... 1:1
Propeller driven rotation (viewed from rear) ......................................................................................Clockwise
* - HIO-360-A has a rating of 180 HP at 26.1 Hg. manifold at standard sea level conditions to 3900 feet
standard altitude with 25 in. Hg. manifold pressure.
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