Spark Plug; Adjusting The Drive Belt; Air Filter; Oil Change - Husqvarna LC 451S Operator's Manual

Spark plug

NOTICE! Always use the recommended spark plug
type! Use of the wrong spark plug can damage the
piston/cylinder.
• If the machine is low on power, difficult to start or runs
poorly at idle speed: always check the spark plug first
before taking other steps.
• If the spark plug is dirty, clean it and check that the
electrode gap is 0.5 or 0.7-0.8 mm. For more
information, see the "Technical data" section. Replace
the spark plug if necessary.

Adjusting the drive belt

If the drive feels slow, it may be due to a worn belt. The
belt must in this case be replaced. Contact an authorised
service workshop.
Air filter
• Remove the air filter cover and take out the filter.
• An air filter that has been in use for a long time cannot
be cleaned completely. The filter must therefore be
replaced with a new one at regular intervals. A
damaged air filter must always be replaced.
• When reassembling, make sure that the filter
completely seals against the filter holder.
Clean the paper filter
• Clean the filter by knocking the filter against a flat
surface. Never use solvent with petroleum, for
example, kerosene, or compressed air to clean the
filter.
MAINTENANCE

Oil change

IMPORTANT! Allow the machine to cool. Hot oil can
cause severe burn injuries.
• Empty the fuel tank.
• The machine has an oil drain plug.
• Place a pan under the drain and remove the plug.
• Please see the engine Operator's Manual for more
information.
• Ask where you can dispose of surplus engine oil at
your local petrol station.
• Fill with new engine oil of the right quality. See
instructions in the section "Technical data".

Fuel system

• Check that the fuel cap and its seal are not damaged.
• Check the fuel hose. Replace if necessary.
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