Filter
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10/15-Hour Maintenance
0.024-0.028 inch
(0.6-0. 7 mm)
Clean the spark plug
and check the gap at
the electrode.
Figure 29
Every 10 to 15 hours of operation:
Remove and clean the spark plug. Adjust
the spark plug electrode gap to 0.024 - 0.028
inch (0.6 - 0.7 ram). If the spark plug must
be replaced, use only an NGK CMR5H or
equivalent resistor type spark plug of the
correct heat range. See Figure 29.
The NGK CMR5H also meets the require-
ments for electro magnetic compliance (EMC).
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,
50-hour Maintenance
Every 50 hours of operation
(more frequently in dusty or
dirty conditions):
II Remove and clean the cylinder cover
and clean grass and dirt from the
cylinder fins.
II Remove the cutting attachment, cutting
attachment holder and gear shaft collal:
Remove the filler plug from the side of
the gear case and press new grease into
the gear case until old grease is pushed
out. Use only lithium-base grease. See
Figure 30.
II Lubricate main shaft splines.
II Use a hooked wire to extract the fuel filter
from inside the fuel tank. See Figure 31.
Remove and replace the filter element.
CAUT|ON!
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be dam-
aged easily.
Before reinstalling the new filter element,
inspect the condition of all the fuel system
components (fuel pick-up line, fuel return
line, tank vent line, tank vent, fuel cap and
fuel tank). If damage, splitting or deteriora-
tion is noted, the unit should be removed
from service until it can be inspected or
repaired by a Swisher-trained service
technician.
Figure 30
New
Grease
Old
Grease
Gear
Shaft
Collar C_
13