Lycoming O-290 Operator's Manual page 20

SECTION 2 LYCOMING OPERATOR'S MANUAL
SPECIFICATIONS O-235 AND O-290 SERIES
SPECIFICATIONS (CONT.)
O-290-D
FAA Type Certificate ....................................................................................................................................229
Take-off horsepower......................................................................................................................................130
Take-off RPM ..............................................................................................................................................2800
Rated horsepower...........................................................................................................................................125
Rated RPM...................................................................................................................................................2600
Bore, inches.................................................................................................................................................4.875
Stroke, inches..............................................................................................................................................3.875
Displacement, cubic inches.........................................................................................................................289.0
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°
Valve rocker clearance (cold) .............................................................................................................. .007/.009
O-290-D2, -D2A
FAA Type Certificate ....................................................................................................................................229
Take-off horsepower......................................................................................................................................140
Take-off RPM ..............................................................................................................................................2800
Rated horsepower...........................................................................................................................................135
Rated RPM...................................................................................................................................................2600
Bore, inches.................................................................................................................................................4.875
Stroke, inches..............................................................................................................................................3.875
Displacement, cubic inches.........................................................................................................................289.0
Compression ratio ..................................................................................................................................... 7.50:1
Prop. drive ratio ............................................................................................................................................. 1:1
Prop. driven rotation (viewed from rear) ............................................................................................Clockwise
Firing orders............................................................................................................................................ 1-3-2-4
Spark occurs, BTC ......................................................................................................................................... 18°
Valve rocker clearance (hydraulic tappets collapsed) ......................................................................... .028-.080
O-290-D2B, -D2C
FAA Type Certificate ....................................................................................................................................229
Take-off horsepower......................................................................................................................................140
Take-off RPM ..............................................................................................................................................2800
Rated horsepower...........................................................................................................................................135
Rated RPM...................................................................................................................................................2600
Bore, inches.................................................................................................................................................4.875
Stroke, inches..............................................................................................................................................3.875
Displacement, cubic inches.........................................................................................................................289.0
Compression ratio ..................................................................................................................................... 7.00:1
Prop. drive ratio ............................................................................................................................................. 1:1
Prop. driven rotation (viewed from rear) ............................................................................................Clockwise
Firing orders............................................................................................................................................ 1-3-2-4
Spark occurs, BTC ......................................................................................................................................... 25°
Valve rocker clearance (hydraulic tappets collapsed) ......................................................................... .028-.080
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