Husqvarna 555FX Operator's Manual page 24

Maintenance
Clean or replace the spark arrester screen.
Lubricate the drive shaft.
Carburetor
To adjust the idle speed
Your Husqvarna product is made to specifications that
decrease harmful emissions.
1. Make sure that the air filter is clean and the air filter
cover is attached before you adjust the idle speed.
2. Adjust the idle speed with the idle speed screw T
which is identified with "T" mark.
a) Turn the idle speed screw T clockwise until the
cutting attachment starts to rotate.
b) Turn the idle speed screw T counterclockwise
until the cutting attachment stops.
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.
3. 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 rotate.
Technical data on page 31 for the
Note: Refer to
recommended idle speed.
To adjust the high speed needle and low
speed needle
The high speed needle and low speed needle can be
adjusted to adapt the fuel supply to local conditions.
2
At an interval of 3 months.
24
2
• Turn the high speed needle and low speed needle
clockwise to decrease the fuel flow.
• Turn the high speed needle and low speed needle
counterclockwise to increase the fuel flow.
To adjust the start throttle speed
(555RXT, 555FRM)
1. Apply idle speed to the product.
2. Push the start throttle lock. Refer to
overview on page 3 .
3. If the start throttle speed is less than 4000 rpm, turn
the adjuster screw (A) clockwise. When the cutting
attachment starts to rotate, turn the adjuster
screw (A) 1/2 turn clockwise.
4. If the start throttle speed is more than 6500 rpm, turn
the adjuster screw (A) counterclockwise. When the
cutting attachment starts to rotate, turn the adjuster
screw (A) 1/2 turn.
To clean the muffler
WARNING: The muffler gets very hot during
and after operation, also at idle speed. Risk
of fire and burn injuries.
Daily Weekly Monthly
Product
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1346 - 002 - 08.10.2019
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