GB-13
G
B
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 (p. 22) if necessary
clean and readjust GAP: .025 in (0.6 ~ 0.7 mm)
spark plug ✔
plug gap replace, if necessary
cylinder fins, intake air cooling vent
clean ✔
muffler, spark arrester, cylinder exhaust port
clean ✔
throttle lever, ignition switch check operation ✔
replace if
cutting parts ✔
something’s wrong
gear case grease ✔
screws/nuts/bolts tighten/replace ✔✔not adjusting screws
debris guard make sure to attach ✔
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
FUEL FILTER
•When the engine runs short of fuel supply, check the
fuel cap and the fuel filter for blockage.
(1) Fuel filter
9. Maintenance
ENGINE
SHAFT