Husqvarna 535RX Operator's Manual page 25

• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
on page 28 .
• Replace the spark plug if it is necessary.
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.
1069 - 008 - 31.10.2022
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.
•
Technical data
To adjust the start throttle speed
1. Apply idle speed.
2. Push the start throttle lock. Refer to
3. If the start throttle speed is less than 4000 rpm, turn
4. If the start throttle speed is too high, turn the
To adjust the idle speed
Your Husqvarna product is designed and made to
specifications that decrease harmful emissions.
•
•
•
Turn the high speed needle to make adjustments.
CAUTION:
high speed needle screw across the
adjustment limitation stop. This can
cause damage to the piston and the
cylinder.
throttle handle with a start throttle lock on page 18 .
the adjuster screw (A) clockwise until the cutting
attachment rotates. Turn the adjuster screw (A)
clockwise) 1/2 turn more.
adjuster screw (A) counterclockwise until the cutting
attachment stops. Turn the adjuster screw (A)
clockwise 1/2 turn more.
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:
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
Do not turn the
To start with a
A
If the cutting
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