24
MA12
English
8. Maintenace
■ 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. (MA9)
(1) Air filter
■ FUEL FILTER
• When the engine runs short of fuel
supply, check the fuel cap and the
fuel filter for blockage. (MA10)
(1) Fuel filter
■ SPARK PLUG
• Starting failure and mis-firing 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. (MA11)
• REPLACEMENT PLUG IS A NGK
BPMR7A.
• 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.
TIGHTENING TORQUE:
14.7–21.6 N.m
(150–220 kg-cm)
■ GEAR CASE
The reduction gears are lubricated by
multipurpose, lithium-based grease in
the gearcase.
Supply new grease every 25 hours of
use or more often depending on the
job condition.
When adding lubricant, use a grease
gun to insert lubricant into the three
