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2. Turn the idle speed screw (T) clockwise until the
cutting attachment starts to turn.
T
3. Turn the idle speed screw (T) counterclockwise until
the cutting attachment stops.
The idle speed is correct when the engine operates
smoothly in all positions. The idle speed must be below
the speed when the cutting attachment starts to turn.
Note: Refer to
Technical data on page 25
for the
recommended idle speed.
WARNING: If the cutting attachment does
not stop when you adjust the idle speed,
speak to your servicing dealer. Do not use
the product until it is correctly adjusted or
repaired.
To adjust the start throttle speed
1. Apply idle speed.
2. Push the start throttle lock. Refer to
To do a check of
the throttle trigger lockout on page 7
.
3. If the start throttle speed is less than 4000 rpm, turn
the adjuster screw (A) until the cutting attachment
rotates. Turn the adjuster screw 1/2 turn more.
A
5 mm
4. If the start throttle speed is too high, turn the adjuster
screw (A) counterclockwise until the cutting
attachment stops. Turn the adjuster screw 1/2 turn
more.
To do a check of the muffler
WARNING: Do not use a product that has a
defective muffler or a muffler that is in bad
condition.
WARNING: Do not use the product if the
spark arrester screen on the muffler is
missing or defective.
1. Examine the muffler for damages and defects.
2. Make sure that the muffler is correctly attached to
the product.
3. If your product has a special spark arrester screen,
clean the spark arrester screen weekly.
4. Replace a damaged spark arrester screen.
CAUTION: If the spark arrester screen is
blocked, the product becomes too hot and
this causes damage to the cylinder and
piston.
To clean the cooling system
CAUTION: A dirty or blocked cooling system
can make the product too hot, which can
cause damage to the product.
The parts of the cooling system are the air intake on the
starter (A), the cooling fins on the cylinder (B) and the
cylinder cover (C).
975 - 001 - 26.09.2019 21
21


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