Weed Eater MX557 Instruction Manual page 8

Air Filter
Air F ilter Cover
MUFFLER AND SPARK ARREST-
ING SCREEN
_l_ WARNING:
The muffler on this prod-
uct contains chemicals known to the State of
California to cause cancer.
As your unit is used, carbon deposits build up
on the muffler and spark arresting screen.
For normal homeowner use, however, the
muffler and spark arresting screen will not re-
quire any service. After 50 hours of use. we
recommend that your muffler be serviced or
replaced by your authorized service dealer.
REPLACE SPARK PLUG
Replace the spark plug each year to ensure
the engine starts easier and runs better. Set
spark plug gap at 0.025 inch (0.6 ram). Igni-
tion timing is fixed and nonadjustable.
1. Twist, then pull off spark plug boot.
2. Remove spark plug from cytinder and
discard.
3. Replace with Champion RCJ-6Y spark
ptug and tighten securely with a 3/4 inch
(19 mm) socket wrench.
4. Reinstall the spark plug boot.
REPLACING THE LINE
1. Press the tabs on the side of the trimmer
head and remove cover and spool.
_f- Cover
_-_ Tap Sutton
2. Remove any remaining line.
3. Clean dirt and debris from all parts. Re-
place spool if it is worn or damaged.
4. Replace with a pre-wound spool, or re-
place line using a 13 feet length of 0.095
inch (2.4 mm) diameter Weed Eatern;
brand line.
5. When installing new line on an existing
spooi, hold the spool as shown in the il-
lustration below.
6. Bend the line at the midpoint and insert
the bend into the slot in the center rim of
the spool. Ensure line snaps into position
in the slot.
With your finger between the lines, wrap
the lines evenly and firmly around the
spool in a clockwise direction.8.
Position the lines in the guide slots.
Guide Slot
Guide
\ Slot
x
9. Insert the ends of the lines through exit
holes in the sides of the cover.
10. Place the spool in the cover.
Spool
Cover
11. Make sure the lines are not caught be-
tween the rim of the spool and the wall of
the cover.
12. Reinstall the spool and cover onto the
trimmer head. Push until cover snaps into
place.
REPLACING THE CUTTING HEAD
1. Align hole in the dust cup with the hole in
the side of the gearbox by rotating the
dust cup.
2. Insert a small screwdriver into aligned
holes. This will keep the shaft from turning
while removing and installing trimmer head.
8