| H, HV, 4 Series Tractor Tune Up Info |
| Engine Model And Type |
C-152 Gas |
C-152 Dist. |
C-152 Gas Fire Crater Pistons* |
C-152 Flat Top Pistons* |
| Compression Pressure (at cranking speed)(psi) |
120 |
95 |
145 |
95 |
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| High Idle (no load) Engine RPM / PTO RPM |
1815 / 594 |
1815 / 594 |
1815 / 594 |
1815 / 594 |
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| Low Idle (no load) Engine RPM / PTO RPM |
425 / 139 |
425 / 139 |
425 / 139 |
425 / 139 |
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| Rated Load Speed Engine RPM / PTO RPM |
1650 / 540 |
1650 / 540 |
1650 / 540 |
1650 / 540 |
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| Horsepower (at load speed) PTO Shaft |
25.6 |
22.3 |
30.8 |
27.5 |
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| Approximate Fuel Rate (at load speed) gals/hour |
2.27-2.44 |
2.07-2.19 |
2.90-3.10 |
2.70-2.85 |
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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 |
.023 |
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| Distributor |
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|
| Symbol |
A |
A |
A S |
A |
| Breaker Point Opening (inch) |
.020 |
.020 |
.020 |
.020 |
| Part Number |
353980R91 |
353980R91 |
364653R91 |
353980R91 |
| Governor Spring Package |
358106R91 |
358106R91 |
362725R91 |
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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|
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|
| I.H. |
1/2 |
1/2 |
1/2 |
1/2 |
| Zenith |
- |
- |
- |
- |
| Carter |
- |
- |
- |
- |
| Marvel-Schebler |
- |
- |
- |
- |
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| Torque Wrench Settings (foot pounds) |
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| Cylinder Head |
70 |
70 |
70 |
70 |
| Manifold |
50 |
50 |
50 |
50 |