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To adjust the engine
Follow these instructions if the engine does not operate
correctly.
1. Attach an approved cutting attachment, see
Accessories on page 29
.
2. Start the engine.
3. Operate the product in usual conditions for 3
minutes.
4. Lift the cutting attachment in the air and apply full
throttle for 30 seconds. If a trimmer head is used,
make sure that the trimmer line is cut to correct
length by the guard knife.
Note: Do not cut grass or branches during this
step.
5. Operate the product in usual conditions to make sure
that the engine operates correctly.
6. If the engine does not operate correctly, do step 4
and 5 again 3 times.
7. Let your Husqvarna dealer adjust/repair the product
if the engine does not operate correctly after you
have done all these steps.
To adjust the low speed needle (L)
• Turn the low speed needle clockwise until stop.
Note: If the product has a bad acceleration
capacity or if the idle speed is not correct, turn the
low speed needle counterclockwise. Turn the low
speed needle until the acceleration capacity and idle
speed is correct.
To adjust the high speed needle (H)
The engine is adjusted at the factory to operate at sea
level. At higher altitudes, in different weather or different
temperatures it can be necessary to adjust the high
speed needle.
• Turn the high speed needle to make adjustments.
CAUTION:
Do not turn the
high speed needle screw across the
adjustment limitation stop. This can
cause damage to the piston and the
cylinder.
To adjust the start throttle speed
1. Apply idle speed.
2. Push the start throttle lock. Refer to
To start with a
throttle handle with a start throttle lock on page 17
.
3. If the start throttle speed is less than 4000 rpm, turn
the adjuster screw (A) clockwise until the cutting
attachment rotates. Turn the adjuster screw (A)
clockwise) 1/2 turn more.
A
4. If the start throttle speed is too high, turn the
adjuster screw (A) counterclockwise until the cutting
attachment stops. Turn the adjuster screw (A)
clockwise 1/2 turn more.
To adjust the idle speed
Your Husqvarna product is designed and made to
specifications that decrease harmful emissions.
• Make sure that the air filter is clean and the air filter
cover is attached before you adjust the idle speed.
• Adjust the idle speed with the idle adjustment screw
T which is identified with "T" mark.
WARNING: If the cutting
attachment does not stop when you
adjust the idle speed, turn to your
nearest servicing dealer. Do not use the
product until it is correctly adjusted or
repaired.
• 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.
1. Turn the idle adjustment screw clockwise until the
cutting attachment starts to turn.
2. Turn the idle adjustment screw counterclockwise
until the cutting attachment stops.
1069 - 009 - 13.06.2023
25
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