International Cub Cadet Tractor Tune Up Info
Engine Model And Type
K-161
K-161 Model 70
K-241
Compression Pressure (at cranking speed)(psi)
110
110
110
High Idle (no load) Engine RPM / PTO RPM
3780 / 3780++ & 541+
3780 / 3780++
3800 / 3800++
Low Idle (no load) Engine RPM / PTO RPM
1000 / 1000++ & 143+
1000 / 1000++
1000 / 1000++
Rated Load Speed Engine RPM / PTO RPM
3600 / 3600++ & 515+
3600 / 3600++
3600 / 3600++
Horsepower (at load speed) PTO Shaft
5
6.3
9.1
Approximate Fuel Rate (at load speed) gals/hour
.79-.84
.79-.84
1.02-1.09
Firing Order
-
-
-
Valve Lash (hot)(inch)
Intake
.007
.007
.009
Exhaust
.017
.017
.018
Spark Plug Gap (inch)
.025
.025
.025
Distributor
Symbol
-
-
-
Breaker Point Opening (inch)
.020
.020
.020
Part Number
-
-
-
Governor Spring Package
-
-
-
Ignition Timing (spark advance BTDC unless otherwise specified) (degrees)
At 400 RPM (+ or - 2 Degrees
-
-
-
At high Idle Speed
20
20
20
Carburetor Liquid level (inches)
I.H.
-
-
-
Zenith
-
-
-
Carter
11/64
11/64
11/64
Marvel-Schebler
-
-
-
Torque Wrench Settings (inch pounds)
Cylinder Head
200
200
200
Manifold
-
-
-
++ Front PTO
+ Rear PTO