Maintenance - Zenoah GZ50N Owner's Manual

GZ50N

6. Maintenance

System/components
fuel leaks, fuel spillage
fuel tank, air filter, fuel filter
idle adjusting screw
spark plug
cylinder fins, intake air cooling vent clean
muffler, spark arrester, cylinder
exhaust port
WARNING
• Make sure that the engine has stopped and is cool
before performing 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.
• Filter element : Check and clean the filter element in
warm, soapy water as required. Dry completely before
installing.
• Paper element : Check and clean the paper element
by air blow as required.
• If the element is broken or shrunk, replace with a new
one.
FUEL FILTER
• When the engine runs short of fuel supply, check the
fuel cap and the fuel filter for blockage.
(1)
GB-6
Procedur
wipe out
inspect/clean
see adjusting
idling speed
clean and readjust
plug gap
clean
(2) (1)
(1) Filter element
(2) Paper element
(1) Fuel filter
Every Every Every
25 50 100
Before hours hours hours
use after after after
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 re-
placement plug, use the correct type specified by
ZENOAH.
0.6~0.7mm
(0.024~0.027in.)
• REPLACEMENT PLUG IS A NGK CMR7H.
IMPORTANT
• Note that using any spark plug other than those des-
ignated may result in the engine failing to operate prop-
erly or in the engine becoming overheated and dam-
aged.
• 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:
Note
replace, if necessary
replace carburetor
if necessary
GAP: .025 in (0.6 ~ 0.7 mm)
replace, if necessary
9.8 ~ 11.8 N.m.
(87 ~ 104 in-lbs)