Throttle Cable Free Play
If the unit does not return to idle speed or
doesen't reach full rpm, the throttle lever
free play may need to be adjusted as follows:
1. Measure free play at the end of the
throttle lever. Throttle lever free play
should be approximately 0.-0.75"
(5-7 mm). See Figure 14.
. If adjustment is necessary, remove the
air cleaner cover by loosening the two
thumbscrews. Loosen the cable adjuster
lock nut and turn the cable adjustment fit-
ting in or out until throttle lever free play
is approximately 0.-0.75" (5-7 mm).
3. Replace the air cleaner cover, and tight-
en the cover retaining screws securely.
10-Hour Maintenance
(more frequently in dusty conditions)
1. Remove the air cleaner cover by loosening
the two thumbscrews. See Figure 16A.
. Remove and inspect the pre-filter. If the
pre-filter is torn or otherwise damaged,
replace it with a new one. See Figure 16B.
3. Clean the pre-filter with soap and water.
Let dry before reinstalling.
4. Inspect the air cleaner element. If the el-
ement is damaged or distorted, replace
it with a new one.
5. Tap filter gently on a hard surface to
dislodge debris from element or use
compressed air from the inside to blow
debris out and away from the air filter
element.
10/15-Hour Maintenance
Clean the spark plug
and check the gap at the
0.6–0.7 mm
Figure 17
Throttle Lever
Free Play
Figure 14
Figure 16 A
Direct the air stream at the inside face of
the filter only!
6. Install the filter element, pre-filter and
cover in the reverse order of removal.
electrode.
0.2-0.275"
(5-7mm)
Unscrew
Fasteners
IMPORTANT!
Throttle Cable
Adjuster Lock
Nut
Throttle
Cable
Adjuster
Throttle
Cable
Figure 15
Pre- Filter
Filter Ele-
ment
Air Cleaner
Cover
Figure 16 B
CAUTION!
Never operate the unit if the air cleaner
assembly is damaged or missing!
Ever y 10 to 15 hours of operation:
n Remove and clean the spark plug. Adjust
the spark plug electrode gap to 0.6 - 0.7
mm. 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 17.
NOTE:
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.
9