| Farmall 450 And W-450 Tractor Tune Up Info |
| Engine Model And Type |
C-281 Gas |
C-281 Dist. |
C-281 Gas Fire Crater Pistons |
C-281 LPG |
| Compression Pressure (at cranking speed)(psi) |
138 |
89 |
135 |
186 |
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|
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| High Idle (no load) Engine RPM / PTO RPM |
1595 / 587 |
1595 / 587 |
1595 / 587 |
1595 / 587 |
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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 / 534 |
1450 / 534 |
1450 / 534 |
1450 / 534 |
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| Horsepower (at load speed) PTO Shaft |
52.1 |
37.4 |
51.6 |
52.1 |
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| Approximate Fuel Rate (at load speed) gals/hour |
4.63-4.91 |
4.05-4.31 |
4.80-5.20 |
5.51-5.79 |
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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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|
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| Spark Plug Gap (inch) |
.023 |
.023 |
.023 |
.015 |
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| Distributor |
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|
| Symbol |
N |
N+ |
N |
N |
| Breaker Point Opening (inch) |
.020 |
.020 |
.020 |
.020 |
| Part Number |
362473R91 |
362473R91 |
362473R91 |
362696R91 |
| Governor Spring Package |
362478R91 |
362478R91 |
362478R91 |
373955R91 |
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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 |
25 |
- |
25 |
16 |
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| Carburetor Liquid level (inches) |
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| I.H. |
9/19 |
9/19 |
9/16 |
- |
| Zenith |
- |
- |
- |
- |
| Carter |
- |
- |
- |
- |
| Marvel-Schebler |
- |
- |
- |
- |
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| Torque Wrench Settings (foot pounds) |
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| Cylinder Head |
110 |
110 |
110 |
110 |
| Manifold |
50 |
50 |
50 |
50 |