McCulloch TRIMMAC 281 - Manual (Page 12)

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3. Wash the filter in soap and water.
4. Allow filter to dry.
5. Replace parts.
Air Filter
Air Filter
Cover
Button
REPLACE SPARK PLUG
Replace the spark plug each year to ensure
the engine starts easier and runs better. Set
spark plug gap at 0,6 mm. Ignition timing is
fixed and nonadjustable.
1. Twist, then pull off spark plug boot.
2. Remove spark plug from cylinder and dis-
card.
3. Replace with Champion RCJ-6Y spark
plug and tighten securely with a 19 mm
socket wrench.
4. Reinstall the spark plug boot.
SERVICE AND ADJUSTMENTS
REPLACING THE LINE
1. Move the ON/OFF switch to the OFF
position.
2. Disconnect the spark plug lead wire.
3. Remove spool by firmly pulling on tap but-
ton. Clean entire surface of hub and
spool. Replace with a pre-wound spool, or
cut two lengths of 4 meters of 2 mm diam-
eter McCullochr brand line.
WARNING:
Never use wire, rope,
string, etc., which can break off and become a
dangerous missile.
4. Insert ends of the line about 1 cm into the
small hole on the inside of spool.
Small
Holes
Spool
Hub
Line in Notch
Line in Notch
Line exit holes
5. Wind the line evenly and tightly onto the
spool. Wind in the direction of the arrows
found on the spool.
6. Push the line into the notches, leaving 7 --
12 cm unwound.
7. Insert the line into the the exit holes in the
hub as shown in the illustration.
8. Align the notches with the line exit holes.
9. Push spool into hub until it snaps into
place.
10. Pull the lines extending outside of the hub
to release them from the notches.
CARBURETOR ADJUSTMENT
WARNING: Keep others away when
making idle speed adjustments. The trimmer
head will be spinning during most of this pro-
cedure. Wear your protective equipment and
observe all safety precautions. After making
adjustments, the trimmer head must not
move/spin at idle speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if you
notice any of the following conditions:
S
Engine will not idle when the throttle is re-
leased.
S The trimmer head moves/spins at idle speed.
Make adjustments with the unit supported so
the cutting attachment is off the ground and
will not make contact with any object. Hold
the unit by hand while running and making ad-
justments. Keep all parts of your body away
from the cutting attachment and muffler.
Idle Speed Adjustment
Allow engine to idle. Adjust speed until engine
runs without trimmer head moving or spinning
(idle speed too fast) or engine stalling (idle
speed too slow).
S
Turn idle speed screw clockwise to in-
crease engine speed if engine stalls or dies.
S Turn idle speed screw counterclockwise to
decrease engine speed if trimmer head
moves or spins at idle speed.
WARNING:
Recheck the idle speed
after each adjustment. The trimmer head
must not move or spin at idle speed to avoid
serious injury to the operator or others.
Idle Speed
Screw
Air Filter
Cover
If you require further assistance or are unsure
about performing this procedure, contact an
authorized service dealer.