8. Maintenance
IMPORTANT
• Note that using any spark plug other than those des
-
ignated 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.
Tightning torque:
9.8~11.8N.m.
(1.0~1.2kgm)
■
GEAR CASE
• The reduction gears are lubricated by multipurpose,
lithium-based grease in the gear case. Supply new
grease every 25 hours of use or more often depend-
ing on the job condition.
• Remove the bolt opposit to the grease nipple before
installing new grease to arrange for old grease to exit.
WARNING
Make sure that the engine has stopped and is cool
before performing any service to the machine. Con-
tact with moving cutting head or hot muffler may
result in a personal injury.
■
AIR FILTER
The air filter, if clogged, will reduce the engine perfor-
mance. 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) Air filter
■
FUEL FILTER
When the engine runs short of fuel supply, check the fuel
strainer for blockage.
(1) Fuel strainer
■
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.
0.6~0.7mm
REPLACEMENT PLUG IS
A NGK BPMR7A.
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