Husqvarna 555FX Operator's Manual page 25

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:
during and after operation, also at idle
speed. Risk of fire and burn injuries.
1. If the muffler on your product has a spark arrester
screen, clean it weekly with a steel brush. Replace
the spark arrester screen if it is damaged.
CAUTION:
screen causes the engine to become too hot
and results in damage to the cylinder and
piston.
CAUTION:
is frequently blocked, let your service agent
examine the muffler.
To clean the cooling system
The cooling system includes the air intake on the starter
housing (A), the cooling fins on the flywheel (B), the
1346 - 004 - 03.06.2021
A
The muffler gets very hot
A blocked spark arrester
If the spark arrester screen
cooling fins on the cylinder (C) and the cylinder cover
(D).
B
Clean the cooling system weekly or more frequently if it
is necessary.
1. Remove the starter housing and the cylinder cover.
2. Clean the cooling system with a brush.
Air filter
A dirty air filter can cause carburetor malfunction, start
problems, loss of engine power and wear to engine
parts. It also makes the engine use more fuel than
necessary. Clean the filter at an interval of 8 hours, or
more frequently if the product is operated in a dusty
environment.
Note:
An engine adjustment can be necessary when
the air filter has been cleaned or replaced. See
Carburetor on page 24 .
To examine the paper air filter
1. Remove the air filter cover.
D
C
A
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