Textron Lycoming O-540 Series - Page 21

TEXTRON LYCOMING OPERATOR'S MANUAL
0-540 & 10-540 SERIES SECTION 2
SPECIFICATIONS
O-540-C*
SERIES
FAA Type Certificate ..................................... 1E4
Rated horsepower ........................................ 250
Rated speed RPM ....................................... 2575
Bore, inches ............................................ 5.125
Stroke, inches .......................................... 4.375
Displacement cubic inches ................................. 541.5
Compression ratio ........................................ 8.5:1
Firing order ............................................ 1-4-5-2-3-6
Spark occures, degrees BTC ................................ 25
°
Valve rocker clearance (hydraulic tappets collapsed) ......... 028-.080
Prop. drive ratio ........................................ 1:1
Prop. driven rotation
.....................................
Clockwise
10-540-J SERIES
FAA Type Certificate ..................................... 1E4
Rated horsepower ........................................ 250
Rated
speed RPM .......................................
2575
Bore, inches ............................................ 5.125
Stroke, inches .......................................... 4.375
Displacement cubic inches
.................................
541.5
Compression
ratio .....................................
.8.5:1
Firing order ............................................ 1-4-5-2-3-6
Spark
occurs, degrees BTC ................................
25
°
Valve rocker clearance (hydraulic tappets collapsed) .......... 028-.080
Prop. drive ratio
........................................
1:1
Prop. driven rotation ..................................... Clockwise
* - IO-540-C4D5D
model engine has an alternate
rating of 235 horse-
power at 2400 RPM. When operating at alternate rating, all performance
data pertinent to the IO-540-W series is applicable.
Revised January 1997
2-3