Trouble Shooting The Engine - McCulloch MT 260 CLS Operator's Manual

Cover
Spool
2. Remove any remaining line.
3. Chean dirt and debris from all parts. Replace spool if it
is worn or damaged.
4. Replace with a pre-wound spool, or replace line using a
25 feet (8 metres) length of 0.080 inch (2 mm) diameter
McCULLOCH brand line.
WARNING: Never use wire, rope, string, etc.,
which can break off and become a dangerous
missile.
5. When installing new line on an existing spool, hold the
spool as shown.
6. Bend the line at the midpoint and inset the bend into
the slot in the center rim of the spool. Ensure line snaps
into positon in the slot.
Slot
7. With your finger between the lines, wrap the lines
evenly and firmly around the spool in a clockwise
direction.
8. Postiton the lines in the guide slots.
Guide slot
Guide slot
9. Place the spool in the cover as shown below.
10. Insert the ends of the lines through exit holes in the
sides of the cover.
Line exit hole
Cover
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11. Reinstall the spool and cover onto the trimmer head.
Push until cover snaps into place.
PROBLEM
Unit won't start or starts but will
not run.
Unit starts, but engine has low
power.
Engine hesitates.
No power under load.
Runs erratically.
Smokes excessively.
REPLACING THE TRIMMER HEAD
1. Hold the dust cup with a wrench to keep the shaft from
turning while removing and installing trimmer head.
Dust Cup
2. Remove trimmer head by trining counterclockwise
(looking from bottom of unit).
3. Thread replacement trimmer head onto the shaft by
turning clockwise. Only tighten hand tight!

TROUBLE SHOOTING THE ENGINE

PROBABLE CAUSE
Incorrect starting procedures. Follow instructions in the User Manual.
Incorrect carburetor mixture adjustment Have carburetor adjusted by an
setting. Authorized Service Center.
Fouled spark plug Clean / gap or replace plug.
Fuel filter blocked. Replace fuel filter.
Incorrect lever position on choke. Move to RUN position.
Dirty spark arrester screen. Replace spark arrester screen.
Dirty air filter. Remove, clean and reinstall filter.
Incorrect carburetor mixture adjustment Have carburetor adjusted by an
setting. Authorized Service Center.
Incorrect carburetor mixture adjustment Have carburetor adjusted by an
setting. Authorized Service Center.
Incorrectly gapped spark plug. Clean / gap or replace plug.
Incorrect carburetor mixture adjustment Have carburetor adjusted by an
setting. Authorized Service Center.
Use properly mixed fuel (40:1 mixture).
Incorrect fuel mixture.
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CORRECTIVE ACTION