| W-9. WR-9, And WR-9S Tractor Tune Up Info |
| Engine Model And Type |
C-335 Gas |
C-335 Dist. |
C-350 Gas Flat Top Pistons+ |
C-350 Dist. Flat Top Pistons+ |
| Compression Pressure (at cranking speed)(psi) |
110 |
77 |
130 |
74 |
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| High Idle (no load) Engine RPM / PTO RPM |
1650 / 592 |
1650 / 592 |
1650 / 592 |
1650 / 592 |
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| Low Idle (no load) Engine RPM / PTO RPM |
425 / - |
425 / - |
425 / - |
425 / - |
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| Rated Load Speed Engine RPM / PTO RPM |
1500 / 538 |
1500 / 538 |
1500 / 538 |
1500 / 538 |
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| Horsepower (at load speed) PTO Shaft |
49.3 |
45.5 |
52.6 |
48.8 |
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| Approximate Fuel Rate (at load speed) gals/hour |
4.38-4.55 |
4.38-4.53 |
5.28-5.54 |
5.28-5.54 |
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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 |
B |
B |
B |
B |
| Breaker Point Opening (inch) |
.020 |
.020 |
.020 |
.020 |
| Part Number |
353891R91 |
353891R91 |
353891R91 |
353891R91 |
| Governor Spring Package |
358106R91 |
358106R91 |
358106R91 |
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 |
40 |
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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| Torque Wrench Settings (foot pounds) |
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| Cylinder Head |
120 |
120 |
120 |
120 |
| Manifold |
40 |
40 |
40 |
40 |