SECTION 5: TROUBLESHOOTING
ENGINE TROUBLESHOOTING
When Engine is Difficult To Start
Cause |
| Countermeasures |
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Fuel is thick and doesn’t flow | - Check the fuel tank and fuel filter. | |
| - Remove water, dirt and other impurities. | |
| - | Check the fuel filter element for water, dirt , or other impurities, and |
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| replace the filter if necessary. |
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Air or water mixed in fuel system | - | If air is in the fuel filter or injection lines, the fuel pump will not work |
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| properly. To attain proper fuel injection pressure, check carefully for |
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| loosened fuel cap nut, etc. |
| - Loosen air vent screw over fuel filter and fuel injection pump to eliminate | |
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| all the air in the fuel system. |
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| |
Thick carbon deposits on orifice of | - This is caused when water or dirt is mixed in the fuel. Clean the nozzle | |
injection nozzle |
| injection piece, being careful not to damage the orifice. |
| - Check to see if nozzle is working properly. If not, install a new nozzle. | |
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| |
Valve clearance is wrong | - Adjust valve clearance: | |
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| Intake — 0.0098 in. (0.25mm) |
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| Exhaust — 0.0118 in. (0.3mm) |
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Leaking valves | - Grind valve | |
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Fuel injection timing is wrong | - | Adjust injection timing. |
| - The injection timing is 18° before top dead center. | |
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Engine oil becomes thick in cold | - Change grade of oil according to the weather (ambient temperature). | |
weather and engine cranks slowly. |
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Low compression | - Bad valve or excessive wear of rings, pistons and liners cause | |
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| insufficient compression. Replace with new parts. |
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Battery is discharged and the engine | - Charge battery. | |
will not crank | - In the winter, always remove battery from tractor, fully charge, and keep | |
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| indoors. Install in tractor at time of use. |
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