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Mufer
This unit must never be operated with a faulty or missing spark
arrester or mufer. Make sure the mufer is well secured and in
good condition. A worn or damaged mufer is a re hazard and
may also cause hearing loss.
Daily Maintenance
Prior to each work day, perform the following:
■ Remove dirt or debris from the
engine, check the cooling ns and
air cleaner for clogging and clean
them as necessary.
■ Carefully remove any accumulation
of dirt or debris from the mufer or
the fuel tank. Dirt build-up in these
areas could cause engine overheat-
ing, induce premature wear, or cre-
ate a re hazard.
■ Check for loose or missing screws
or components. Make sure the cut-
ting attachment is securely fastened.
■ Check the entire unit for leaking fuel
or grease.
Spark Plug
Keep the spark plug and wire connections tight and
clean.
Fasteners
Make sure nuts, bolts, and screws (except carburetor
adjusting screws) are tight.
Unscrew
Fasteners
CAUTION!
Do not operate the unit if the air
cleaner or lter is damaged, or if
the lter is wet or water soaked.
Remove and clean or
replace the element
10-Hour Maintenance
Every 10 hours of operation
(more frequently in dusty or dirty
conditions):
■ Remove the air cleaner element.
Clean or replace as neces-
sary. To clean element: wash it
thoroughly in soap and water.
Let it dry before reinstalling the
element.
spark plug gap--all models
Remove and inspect spark plug
Clean the spark plug
and check the gap at
the electrode.
0.6 mm
(0.024 inch)
CAUTION!
Before removing the spark plug, clean
the area around the plug to prevent
dirt and debris from getting into the
engine’s internal parts.
10/15-Hour Maintenance
Every 10 to 15 hours of operation:
■ Remove and clean the spark plug.
Adjust the spark plug electrode gap
0.6 mm to (0.024 inch). If the spark
plug must be replaced, use only an
BPMR6A or equivalent resistor type
spark plug of the correct heat range.