Husqvarna 525LST Operator's Manual page 20

Maintenance
Make sure that the throttle trigger lockout and the throttle trigger operates cor-
rectly.
Do a check of the stop switch to make sure that it operates correctly.
Make sure that the cutting attachment does not rotate at idle speed.
Clean the air filter. Replace the air filter if it is necessary.
Examine the cutting attachment guard for damages and cracks. Replace the
guard if it is hit or damaged.
Examine the trimmer head for damages and cracks. Replace the trimmer head if
it is damaged.
Make sure that the screws and nuts are tight.
Examine the engine, the fuel tank and the fuel lines for leaks.
Clean the cooling system.
Examine the starter and the starter rope for damages.
Examine the vibration damping elements for damages and cracks.
Clean the external parts of the spark plug. Remove it and do a check of the elec-
trode gap. Adjust the electrode gap to the correct distance, refer to
ta on page 25 or replace the spark plug. Make sure that the spark plug is fitted
with a suppressor.
Clean the external parts of the carburetor and the area around it.
Do a check of the bevel gear to make sure that it is filled ¾ with grease. Fill the
bevel gear with Husqvarna special grease if it is necessary.
Clean or replace the spark arrestor mesh on the muffler (only applies to mufflers
without a catalytic converter).
Do a check of the fuel filter for contamination and the fuel hose for cracks or oth-
er defects. Replace parts if it is necessary.
Do a check of all the cables and connections.
If it is necessary to replace the clutch, clutch springs or clutch drum, speak to
your servicing dealer.
Replace the spark plug. Make sure that the spark plug is fitted with a suppres-
sor.
Carburetor function
The carburetor supplies a mixture of fuel and air to the
engine. The quantity of this mixture is controlled by the
throttle. The proportions of fuel and air in the mixture is
controlled by the adjustable high and low speed jets.
The jets must be correctly adjusted for the engine to
have maximum power at different speeds. A correctly
adjusted carburetor gives the engine maximum power at
different speeds. It also gives the engine a smooth idle
20
Technical da-
speed and makes it possible to increase engine speed
quickly.
The correct adjustment of the carburetor can change if
the air moisture, temperature and air pressure changes.
The carburetor has 3 adjustment controls.
• L = low speed jet
• H = high speed jet
• T = idle speed
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