GB-13
G
B
HTZ7500 / CHTZ6000 / CHTZ7500
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 in-
stalling. If the element is broken or shrunk, replace
with a new one.
8. Maintenance
(1)air filter
(1)fuel filter
Every Every Every
25
50
100
System/components
Procedure
Before
hours hours hours Note
use
after
after
after
fuel leaks, fuel spillage
wipe out
✔
fuel tank, air filter, fuel filter
inspect/clean
✔
✔
replace, if necessary
see adjusting
replace carburetor
idle adjusting screw
✔
idling speed
if necessary
clean and readjust
GAP: 0.6 ~ 0.7 mm
spark plug
✔
plug gap
replace, if necessary
intake air cooling vent
clean
✔
throttle trigger, stop switch
check operation
✔
clean
take it to a service dealer
cutting parts
✔
if somethings wrong
gear case
grease
✔
screws/nuts/bolts
tighten/replace
✔
✔
not adjusting screws
plate receive
make sure to attach
✔
ENGINE
TRIMMER
FUEL FILTER
• When the engine runs short of fuel supply, check the
fuel cap and the fuel filter for blockage.
(1)
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 re-
placement plug, use the correct type specified by
ZENOAH.
0.6~0.7mm
• REPLACEMENT PLUG IS A NGK CMR7H.
