Filter
Top Products
19
Carburetor Adjustments
A clean and unrestricted airflow is
essential to your saw engine’s perfor-
mance and durability! Before attempt-
ing any carburetor adjustments,
inspect and clean the engine air filter
as required! Procedures for maintain-
ing this saw’s air cleaner are described
on page 27 of this manual.
Before starting the engine
1. Inspect saw chain tension, and
adjust if necessary. (see page 13)
2. Make sure the chain brake is
disengaged, and that the saw chain
is free to rotate.
Start the engine, warm the engine to
operating temperature. Place the saw
on the ground, and adjust the
caburetor as follows:
Idle speed adjustment
(engine idling)
Use a screwdriver to slowly turn the idle
speed adjusting screw in or out until the
engine idles at 2,600-3,000 rpm (min
-1
).
35715
Choke
Control
Low-speed
Mixture
Adjustment
Screw
Idle Adjust-
ment Screw
WARNING!
The saw chain must never
rotate at engine idle speed!
Low and High Mixture Adjust-
ments for Emission Compliance
Engines.
Low Speed Mixture (engine idling
at operating temperature)
1. Using a small screwdriver, slowly
turn the low speed mixture screw
clockwise (lean mixture), and note
any changes in engine rpm. See
illustration above.
2. Next, turn the low speed mixing
screw counter-clockwise (rich
mixture) and note any changes in
engine rpm.
3. Adjust the low speed mixture screw
to provide the smoothest possible
idle with no sacrifice in accelera-
tion.
4. If necessary, readjust the idle speed
screw for an engine idle speed of
2,600-3,000 rpm (min
-1
).
High Speed Mixture
High-speed adjustments are factory
set and can not be adjusted.
High-speed Mixture Adjustment Screw
(Non Emission Compliance Engines Only)
OPERATION
22
Chain Brake Maintenance
■ Keep the brake mechanism clean
and free of sawdust or debris.
■ If the chain brake becomes dam-
aged or worn, or fails to completely
engage or release the clutch drum,
return the saw to your dealer for
repairs.
CAUTION!
■ Never start or operate this saw
while the chain brake is
engaged!
■ Never carry the saw by the
brake lever! Carry the saw by
the front handle.
■ Always disengage the chain
brake before removing or
replacing the clutch cover!
■ Never make carburetor
adjustments while the chain
brake is engaged!
35721
WARNING!
The above procedure
must cause the chain
brake to engage! If the chain brake
does not fully engage during this
test, do not operate the saw! Return
the saw to your dealer for repairs!
Chain Brake Inspection
(engine “off”)
1. Turn the engine “off,” and make
sure the ignition switch is in the
“O” or “off” position.
2. Hold the saw with the bar tip 12 to
20 inches (30-50 cm) above a soft
wood block.
3. Quickly release the front handle,
allowing the guide bar tip to strike
the wooden block.
4. The chain brake must engage as
soon as the bar tip strikes the
wood.
OPERATION
Chain Brake (cont.)