Maintenance - Zenoah HTZ7500 Owner's Manual

8. Maintenance

System/components
fuel leaks, fuel spillage
fuel tank, air filter, fuel filter
idle adjusting screw
spark plug
intake air cooling vent
throttle trigger, stop switch
cutting parts
gear case
screws/nuts/bolts
plate receive
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.
(1)air filter
Before
Procedure
use
✔
wipe out
✔
inspect/clean
see adjusting
✔
idling speed
clean and readjust
plug gap
clean
✔
check operation
✔
clean
grease
✔
tighten/replace
✔
make sure to attach
FUEL FILTER
• When the engine runs short of fuel supply, check the
(1)fuel filter
SPARK PLUG
• Starting failure and mis-firing are often caused by a
• REPLACEMENT PLUG IS A NGK CMR7H.
HTZ7500 / CHTZ6000 / CHTZ7500
Every Every Every
25 50 100
hours hours hours
after after after
✔
replace, if necessary
replace carburetor
if necessary
GAP: 0.6 ~ 0.7 mm
✔
replace, if necessary
✔
take it to a service dealer
if somethings wrong
✔
✔
not adjusting screws
fuel cap and the fuel filter for blockage.
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
Note
G
B
(1)
GB-13