| Super M and Super 6 Series Tractor Tune Up Info |
| Engine Model And Type |
C-264 Gas |
C-264 Dist. |
C-264 LPG |
C-281 Gas Fire Crater Pistons * |
C-281 Dist. Flat Top Pistons * |
C-281LPG Fire Crater Pistons * ++ |
| Compression Pressure (at cranking speed)(psi) |
129 |
92 |
140 |
135 |
89 |
197 |
|
|
|
|
|
|
|
| High Idle (no load) Engine RPM / PTO RPM |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
|
|
|
|
|
|
|
| Low Idle (no load) Engine RPM / PTO RPM |
425 / 157 |
425 / 157 |
425 / 157 |
425 / 157 |
425 / 157 |
425 / 157 |
|
|
|
|
|
|
|
| Rated Load Speed Engine RPM / PTO RPM |
1450 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
|
|
|
|
|
|
|
| Horsepower (at load speed) PTO Shaft |
43.5 |
37.0 |
43.5 |
50.2 |
44.0 |
50.5 |
|
|
|
|
|
|
|
| Approximate Fuel Rate (at load speed) gals/hour |
4.02-4.26 |
3.64-3.86 |
5.34-5.66 |
4.50-4.90 |
4.12-4.50 |
5.80-6.30 |
|
|
|
|
|
|
|
| Firing Order |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
|
|
|
|
|
|
|
| Valve Lash (hot)(inch) |
|
|
|
|
|
|
| Intake |
.017 |
.017 |
.017 |
.017 |
.017 |
.017 |
| Exhaust |
.017 |
.017 |
.017 |
.017 |
.017 |
.017 |
|
|
|
|
|
|
|
| Spark Plug Gap (inch) |
.023 |
.023 |
.015 |
.025 |
.023 |
.015 |
|
|
|
|
|
|
|
| Distributor |
|
|
|
|
|
|
| Symbol |
J |
J |
J |
J AB |
J |
T AB |
| Breaker Point Opening (inch) |
.020 |
.020 |
.020 |
.020 |
.020 |
.020 |
| Part Number |
357935R91 |
357935R91 |
357395R91 |
372712R91 |
357935R91 |
372712R91 |
| Governor Spring Package |
358108R91 |
358108R91 |
358108R91 |
372712R91 |
357935R91 |
372712R91 |
|
|
|
|
|
|
|
| Ignition Timing (spark advance BTDC unless otherwise specified) (degrees) |
|
|
|
|
|
|
| At 400 RPM (+ or - 2 Degrees |
0 |
0 |
0 |
0 |
0 |
0 |
| At high Idle Speed |
30 |
30 |
30 |
22 |
30 |
22 |
|
|
|
|
|
|
|
| Carburetor Liquid level (inches) |
|
|
|
|
|
|
| I.H. |
9/19 |
9/16 |
- |
9/16 |
9/16 |
- |
| Zenith |
- |
- |
- |
- |
- |
- |
| Carter |
- |
- |
- |
- |
- |
- |
| Marvel-Schebler |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
|
| Torque Wrench Settings (foot pounds) |
|
|
|
|
|
|
| Cylinder Head |
110 |
110 |
110 |
110 |
110 |
110 |
| Manifold |
50 |
50 |
50 |
50 |
50 |
50 |