Lycoming O-290 Operator's Manual page 17

LYCOMING OPERATOR'S MANUAL SECTION 2
O-235 AND O-290 SERIES SPECIFICATIONS
SECTION 2
SPECIFICATIONS
O-235-C*, -E SERIES
FAA Type Certificate ....................................................................................................................................223
Take-off horsepower......................................................................................................................................115
Take-off RPM ..............................................................................................................................................2800
Rated horsepower...........................................................................................................................................115
Rated RPM...................................................................................................................................................2800
Bore, inches.................................................................................................................................................4.375
Stroke, inches..............................................................................................................................................3.875
Displacement, cubic inches.........................................................................................................................233.3
Compression ratio ..................................................................................................................................... 6.50:1
Prop. drive ratio ............................................................................................................................................. 1:1
Prop. driven rotation (viewed from rear) ............................................................................................Clockwise
Firing orders............................................................................................................................................ 1-3-2-4
Spark occurs, BTC ......................................................................................................................................... 25°
Rocker clearance, cold ......................................................................................................................... .007/.009
* - O-235-C1 has provision for two position prop. control valve.
O-235-C1C
FAA Type Certificate ....................................................................................................................................223
Take-off horsepower......................................................................................................................................115
Take-off RPM ..............................................................................................................................................2800
Rated horsepower...........................................................................................................................................108
Rated RPM...................................................................................................................................................2600
Bore, inches.................................................................................................................................................4.375
Stroke, inches..............................................................................................................................................3.875
Displacement, cubic inches.........................................................................................................................233.3
Compression ratio ..................................................................................................................................... 6.75:1
Prop. drive ratio ............................................................................................................................................. 1:1
Prop. driven rotation (viewed from rear) ............................................................................................Clockwise
Firing orders............................................................................................................................................ 1-3-2-4
Spark occurs, BTC ......................................................................................................................................... 25°
Rocker clearance, cold ......................................................................................................................... .007/.009
2-1