Lycoming O-320 76 Series Operator's Manual page 15

LYCOMING SERIES OPERATOR'S MANUAL
O-320
FAA Type Certificate ....................................................................................................................................274
Rated horsepower...........................................................................................................................................160
Rated speed, RPM........................................................................................................................................2700
Bore, inches.................................................................................................................................................5.125
Stroke, inches..............................................................................................................................................3.875
Displacement, cubic inches.........................................................................................................................319.8
Compression ratio ..................................................................................................................................... 9.00:1
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 drive rotation (viewed from rear) ........................................................................................Clockwise
*Accessory Drive
Starter
Starter (Optional)
Alternator
Tachometer
Magneto
Vacuum Pump AND2000
Prop Gov. – AND20010
Dual Drive
Vacuum Pump and Hyd. Pump
* - When applicable.
** - Viewed facing drive pad.
Standard Dry Weight –
O-320-H1AD, -H2AD, -H1BD, -H2BD.................................................................................................283 lbs.
SECTION 2
SPECIFICATIONS
O-320-H
Drive Ratio
13.556:1
16.556:1
3.250:1
0.500:1
1.000:1
1.313:1
1.000:1
1.313:1
SECTION 2
SPECIFICATIONS
**Direction of Rotation
Counterclockwise
Counterclockwise
Clockwise
Clockwise
Clockwise
Counterclockwise
Clockwise
Counterclockwise
2-1