Textron Lycoming IO-540 Series Operator's Manual page 19

TEXTRON LYCOMING OPERATOR'S MANUAL
0-540 & 10-540 SERIES
SECTION 2
SPECIFICATIONS
0-540 SERIES
-A*
-B
-E,-G-,H
FAA Type Certificate
295
295 295
Rated horsepower
250
235
260
Rated speed RPM
2575 2575
2700
Bore, inches
5.125
5.125 5.125
Stroke, inches
4.375
4.375 4.375
Displacement cubic inches
541.5
541.5 541.5
Compression ratio
8.5:1
7.2:1
8.5:1
Firing order
1-4-5-2-3-6
1-4-5-2-3-6
1-4-5-2-3-6
Spark occurs degrees BTC
250
25
25
Valve rocker clearance
(hydraulic tappets collapsed)
.028-.080
.028-.080
.028-.080
Prop. drive ratio
1:1
1:1
1:1
Prop. driven rotation
Clockwise
Clockwise
Clockwise
0-540 SERIES
-J,-L
-F
FAA Type Certificate
295
295
Rated horsepower
235
235
Rated speed RPM
2400
2800
Bore, inches
5.125
5.125
Stroke, inches
4.375
4.375
Displacement cubic inches
541.5
541.5
Compression ratio
8.5:1
8.5:1
Firing order
1-4-5-2-3-6 1-4-5-2-3-6
Spark occurs degrees BTC
23
250
Valve rocker clearance
(hydraulic tappets collapsed)
.028-.080
.028-.080
Prop. drive ratio
1:1
1:1
Prop. driven rotation
Clockwise
Clockwise
*0-540-A Series alternate hp/rpm rating: 235/2400 (except -A3D5).
2-1