| M, MV, And 6 Series Tractor Tune Up Info |
| Engine Model And Type |
C-248 Gas |
C-248 Dist. |
C-264 Gas Fire Crater Pistons* |
C-264 Flat Top Pistons* |
| Compression Pressure (at cranking speed)(psi) |
121 |
96 |
135 |
92 |
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|
|
| High Idle (no load) Engine RPM / PTO RPM |
1595 / 591 |
1595 / 591 |
1595 / 591 |
1595 / 591 |
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| Low Idle (no load) Engine RPM / PTO RPM |
425 / 157 |
425 / 157 |
425 / 157 |
425 / 157 |
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| Rated Load Speed Engine RPM / PTO RPM |
1450 / 537 |
1450 / 537 |
1450 / 537 |
1450 / 537 |
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| Horsepower (at load speed) PTO Shaft |
36.0 |
34.1 |
47.9 |
46.0 |
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|
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| Approximate Fuel Rate (at load speed) gals/hour |
3.30-3.41 |
3.11-3.25 |
4.20-4.50 |
4.01-4.34 |
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| Firing Order |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
1-3-4-2 |
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| Valve Lash (hot)(inch) |
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|
|
|
| Intake |
.017 |
.017 |
.017 |
.017 |
| Exhaust |
.017 |
.017 |
.017 |
.017 |
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|
|
| Spark Plug Gap (inch) |
.023 |
.023 |
.023 |
.023 |
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| Distributor |
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|
| Symbol |
A |
A |
A AB |
A |
| Breaker Point Opening (inch) |
.020 |
.020 |
.020 |
.020 |
| Part Number |
353890R91 |
353890R91 |
372721R91 |
3353890R91 |
| Governor Spring Package |
358106R91 |
358106R91 |
372785R91 |
358106R91 |
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| Ignition Timing (spark advance BTDC unless otherwise specified) (degrees) |
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| At 400 RPM (+ or - 2 Degrees |
0 |
0 |
0 |
0 |
| At high Idle Speed |
40 |
40 |
22 |
40 |
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| Carburetor Liquid level (inches) |
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|
| I.H. |
9/16 |
9/16 |
9/16 |
9/16 |
| Zenith |
- |
- |
- |
- |
| Carter |
- |
- |
- |
- |
| Marvel-Schebler |
- |
- |
- |
- |
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|
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| Torque Wrench Settings (foot pounds) |
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| Cylinder Head |
110 |
110 |
110 |
110 |
| Manifold |
50 |
50 |
50 |
50 |