Husqvarna 541EA Operator's Manual page 12

To check the spark plug
CAUTION: Always use the recommended
spark plug type. Incorrect spark plug type
can cause damage to the product.
• The spark plug condition is influenced by: a)
Incorrect carburettor adjustment. b) An incorrect
fuel mixture (too much or incorrect type of oil). c)
A dirty air filter.
• Do not touch the spark plug with your bare hands
immediately after operation, as there is the risk of
burns due to high temperature.
• If the machine is low on power, difficult to start or
runs poorly at idle speed: always check the spark
plug first before taking any further action.
• If the spark plug is dirty, clean it and check that
the correct electrode gap is 0.6 to 0.7mm.
• The spark plug should be replaced after about a
month in operation or earlier if necessary.
To adjust the idle speed
• Make sure that the air filter is clean. The drill
attachment must not rotate in correct 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. The idle speed must be
below the speed when the drill attachment starts
to turn.
WARNING: If the idle speed cannot be
adjusted so that the drill attachment
stops, speak to the distributor or the
service center. Do not use the product
until it is correctly adjusted or repaired.
1. Turn the idle adjustment screw clockwise until
the drill attachment starts to turn.
2. Turn the idle adjustment screw counterclockwise
until the drill attachment stops.
12
To check the cooling system
The product has a cooling system to keep the work
temperature low.
WARNING: Never touch the cylinder,
muffler, or spark plug with your bare
hands immediately after stopping the
engine. The engine can become very hot
when in operation, and doing so could
result in severe burns.
WARNING: A dirty or blocked cooling
system causes overheating. It causes
damage to the piston and cylinder.
• When checking the product to make sure that it is
in good condition before using it, check the area
around the muffler and remove any staffs that
attached, in case the muffler is overheated or even
the engine catch on fire.
• Check the intake air cooling vent and the area
around the cylinder cooling fins for blockage every
25 hours of use, in case of engine overheat or
even product failure. Note that it is necessary to
remove the upper cover and the lower cover in
order to be able to view the upper part of the
cylinder.
To check the gearbox
During normal use, disassembly the relef valve (A)
every 50 hours to check whether there is still grease
in the gearbox, and the grease in the gearbox must
be replaced every 100 hours.
A