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9. Maintenance |
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| Every | Every | Every |
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| System/components | Procedure | Before | 25 | 50 | 100 | Note |
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| use | hours | hours | hours |
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| after | after | after |
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| fuel leaks, fuel spillage | wipe out | ✔ |
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| replace, if necessary | G |
| fuel tank, air filter, fuel filter | inspect/clean | ✔ | ✔ |
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| see ■ adjusting |
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| replace carburetor | |
ENGINE | idle adjusting screw | ✔ |
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idling speed (p. 11) |
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| if necessary |
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spark plug |
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| clean and readjust |
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| GAP: 0.6 - 0.7 mm |
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| plug gap |
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| replace, if necessary |
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| cylinder fins, intake air cooling vent | clean |
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| muffler, spark arrester, | clean, |
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| cylinder exhaust port | remove piled up carbon |
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SHAFT | throttle lever, ignition switch | check operation | ✔ |
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transmission | grease |
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| screws/nuts/bolts | tighten/replace | ✔ |
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| ✔ | not adjusting screws |
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UNIT | oiling port | clean | ✔ |
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guide bar | clean | ✔ |
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CUTTING |
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sprocket | inspect/replace |
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| saw chain | inspect/sharp | ✔ |
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WARNING
•Make sure that the engine has stopped and is cool before per- forming any service to the machine. Contact with moving cutting head or hot muffler may result in a personal injury.
AIR FILTER
•The air filter, if clogged, will reduce the engine performance. Check and clean the filter element in warm, soapy water as required. Dry completely before installing. If the element is broken or shrunk, replace with a new one.
(1)
(1) Air filter
FUEL FILTER
•When the engine runs short of fuel supply, check the fuel cap and the fuel filter for blockage.
(1)
(1) Fuel filter
SPARK PLUG
•Starting failure and misfiring are often caused by a fouled spark plug. Clean the spark plug and check that the plug gap is in the correct range. For a replacement plug, use the correct type specified by ZENOAH.
0.6- 0.7 mm
•REPLACEMENT PLUG IS A NGK CMR7H.
IMPORTANT
•Note that using any spark plug other than those designated may result in the engine failing to operate properly or in the engine becoming overheated and damaged.
•To install the spark plug, first turn the plug until it is finger tight, then tighten it a quarter turn more with a socket wrench.
9.8- 11.8 N.m. TIGHTENING TORQUE: (1 - 1.2 kg.m.)
MUFFLER
WARNING
•Inspect periodically, the muffler for loose fasteners,any damage or cor- rosion. If any sign of exhaust leakage is found, stop using the machine and have it repaired immediately.
•Note that failing to do so may result in the engine catch- ing on fire.
