Husqvarna 524LK Operator's Manual page 13

• Make sure that there are no cracks at the bottom of
the grass blade teeth or by the center hole of the
blade. Replace the blade if it is damaged.
• Examine the support flange for cracks. Replace the
support flange if it is damaged.
• Make sure that the locknut can not be removed by
hand. If you can remove it by hand, it does not lock
the cutting attachment sufficiently and you must
replace it.
• Examine the trimmer head and trimmer guard for
damages or cracks. Replace the trimmer head and
trimmer guard if they have been hit or if they have
cracks.
1309 - 004 - 23.03.2021
Fuel
This product has a four-stroke engine.
CAUTION:
result in engine damage.
Gasoline
• Use Husqvarna 4-stroke fuel for best performance
and extension of the engine life. The Husqvarna 4-
stroke fuel does not become bad or oxidized, which
keeps the maintenance intervals to a minimum.
• If Husqvarna 4-stroke fuel is not available, use good
quality unleaded gasoline with a maximum of 10%
ethanol contents.
CAUTION:
an octane grade less than 90 RON/87
AKI. Use of a lower octane grade can
cause engine knocking, which causes
engine damages.
4-stroke oil
• Do a check of the engine oil level before you start
the product. Too low engine oil level can cause
damage to the engine. Refer to
engine oil level on page 15 .
• When the product is new, replace the engine oil after
the first month or the first 10 hours of operation.
• Use Husqvarna 4-stroke oil for the best performance
and engine life. Speak to an approved service agent
to select the correct engine oil.
• If Husqvarna 4-stroke oil is not available, use a 4-
stroke oil of good quality with minimum API SG
rating. The recommended viscosity class is SAE
10W-40. Speak to an approved service agent to
select the correct oil.
CAUTION:
stroke engines.
To fill the fuel tank
WARNING:
follows for your safety.
1. Stop the engine and let the engine become cool.
Incorrect type of fuel can
Do not use gasoline with
To do a check of the
Do not use oil for two-
Obey the procedure that
13