Service and adjustments – Craftsman 358.79104 User Manual
Page 15
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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 mm). Ignition timing is
fixed and nonadjustable.
1. Twist, then pull off spark plug boot.
2. Remove spark plug from cylinder
and discard.
3. Replace with Champion RCJ-6Y
spark plug and tighten securely
with a 3/4 inch socket wrench.
4. Reinstall the spark plug boot.
SERVICE AND ADJUSTMENTS
LINE REPLACEMENT
• Always use Craftsman replacement
line.
Choose the line size best suited for
the job at hand. Red line is designed
for cutting grass and small weeds.
The black colored line is designed for
cutting larger weeds and light brush.
NOTE;
Before inserting new line into
the holes in the cutting head, identify
the proper holes. Follow directions as
shown on the line glide plate.
1. Remove the old line and line glide
plate from the cutting head.
2. Clean entire surface of cutting
head.
3. Reinstall line glide plate (see il
lustration). Align arrow with:
©
when using medium (red) or
large (black) line
when using lines with diameter
(§) smaller than medium (red) line
(optional)
Arrow
/
Cutting head
NOTE:
Line glide plate must be rein
stalled in cutting head before inserting
new line.
4. Insert both ends of your line
through the proper holes in the
side of the cutting head.
5. Pull the line and make sure the
line is against the hub and ex
tended full through the positioning
tunnels.
Line against
the hub
Positioning
f
Tunnel
6. Correctly installed line will be the
same length on both ends.
CARBURETOR ADJUSTMENT
^WARNING: Keep others away
when making idle speed adjustments.
The trimmer head will be spinning dur
ing most of this procedure. Wear your
protective equipment and observe all
safety precautions. After making ad
justments, the trimmer head must not
move or spin at idle speed.
The carburetor has been carefully set
at the factory. Adjustments may be
necessary if you notice any of the fol
lowing conditions:
• Engine will not idle when the throttle is
released.
• The trimmer head moves or spins at
idle.
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