Technical Data - Husqvarna 125B Manuel D'utilisation

• Clean the spark-arresting screen and replace it if
necessary (not on mufflers with a catalytic
converter).
• Clean the carburetor area.
• Clean the air filter.
Monthly maintenance
• Examine the starter rope handle and the starter
rope.
• Clean the fuel tank.
• Clean the carburetor and the area around it.
• Clean the blades on the impeller.
• Examine the fuel lines for cracks or other
damage. Change if necessary
• Change the fuel filter in the fuel tank.
• Examine all cables and connections.
• Replace the spark plug.
• Change the air filter.
Yearly maintenance
• Examine the spark plug.
• Clean the external surface of the carburetor and
its adjacent areas.
• Clean the cooling system.
• Examine the spark arrester screen.
• Examine the fuel filter.
• Examine the fuel hose for damage.
• Examine all cables and connections.
50 hours maintenance
• Have an approved service center repair or
replace the muffler.
To adjust the idle speed
• 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.
• The idle speed is correct when the engine
operates smoothly in all positions.
(Fig. 31)
1. Turn the idle adjustment screw clockwise for
higher speed.
2. Turn the idle adjustment screw counterclockwise
for lower speed.
Engine Specifications
Cylinder displacement
237 - 011 - 15.11.2021
To do maintenance on the spark
arrester screen
Use a wire brush to clean the spark arrester screen.
To clean the cooling system
(Fig. 32)
Clean the parts of the cooling system with a brush.
To examine the spark plug
• 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
Technical data on page 13 . (Fig. 33)
• Replace the spark plug if it is necessary.
To do the maintenance to the air
filter
To clean the air filter
1. Remove the air filter cover and remove the air
filter. (Fig. 34)
2. Clean the air filter with warm soap water. Make
sure that the air filter is dry before you install it.
3. Replace the air filter if it is too dirty to fully clean
it. Always replace a damaged air filter.
4. If your product has a foam air filter, apply air filter
oil. Only apply air filter oil to a foam filter. Do not
apply oil to a felt filter.

Technical data

unit
3
cm
CAUTION:
Always use the
recommended spark plug type. Incorrect
spark plug type can cause damage to
the product.
125B
(125B28HV)
28 28
125BVX
(125B28HV)
13