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MAINTENANCE
If the machine is low on power, difficult to start or runs
poorly while idling always check the spark plug first.
If the spark plug is dirty, clean it and at the same time check
that the electrode gap is 0.5 mm. The spark plug should be
changed after about one month of operation or earlier if
necessary.
NOTE! Always use the recommended type of spark plug. An
incorrect spark plug can damage the cylinder/piston.
0,5 mm
Angle gear
The angle gear is filled
with a sufficient quantity
of grease at the factory.
However, before using the
machine you should check
that the angle gear is filled
to 3/4 with grease. Use
JONSERED special grease.
Normally, the grease does
not need to be changed
except when the angle gear
is repaired.
Two-part shaft
The end of the drive axle in
the lower shaft should be
lubricated with grease every
30 hours. There is a risk
that the drive axle ends
(splined coupling) on two-
part shafts jam if they are
not lubricated regularly.
NOTE: Use only JONSERED replacement parts. Use of other
brands of replacement parts can cause damage to your unit or
injury to the operator or others. Your warranty does not cover
damage or liability caused by the use of accessories and/or
attachments not specifically recommended by JONSERED.
Maintenance schedule
Below you will find some general maintenance instructions.
Daily maintenance
• Check throttle trigger and throttle trigger lockout function.
• Check stop switch function.
• Check that blade/trimmer head does not rotate at idling.
• Clean the exterior of the machine.
• Check that the harness is undamaged.
• Check the blade guard for damage or cracks.
• Change the guard in case of impacts or cracks.
• Check the trimmerhead for cracks and chips or damage.
Replace if necessary.
• A non-balanced blade/trimmer head induces heavy vibrations
that may damage the machine.
• Check that the blade nut is sufficiently tightened.
• Check that nuts and screws are sufficiently tightened.
Weekly maintenance
• Check the starter, especially cord and return spring.
• Clean the carburetor area.
• Clean the exterior of the spark plug.
• Remove it and check the electrode gap.
• Adjust it to 0,5 mm (.020"), or change the spark plug.
• Clean the cooling fins on the cylinder and check that the air
intake at the starter is not clogged.
• Check that the angle gear is filled with grease up to 3/4. Use
special grease.
• Clean the air filter.
• Clean or replace the muffler’s spark arrest screen (not on
mufflers with a catalytic converter).
Monthly maintenance
• Clean the fuel tank.
• Clean the exterior of the carburetor and the space around it.
• Clean the fan and the space around it.
• Check fuel hose for cracks or other damage. Change if
necessary.
• Change fuel filter in fuel tank.
• Check clutch, clutch spring and clutch drum for wear. Change
if necessary.
• Check electrical wires and connections.
• Change the spark plug.
• Change the airfilter.
• Check and clean the muffler’s spark arrest screen if necessary
(only mufflers with a catalytic converter).
Spark plug
The condition of the spark
plug is affected by:
• An incorrect carburetor
setting.
• An incorrect fuel
mixture (too much or
faulty oil).
• A dirty air filter.
These factors cause
deposits on the spark plug
electrode that may result in
malfunction or starting
difficulties.
Oiling the air filter
Always use HUSQVARNA
filter oil, order no. 503 47
73-01. The filter oil contains
a solvent to make it spread
evenly through the filter.
You should therefore avoid
skin contact. Put the filter in
a plastic bag and the pour
the filter oil over it. Knead
the plastic bag to distribute
the oil. Squeeze the excess
oil out of the filter inside the
plastic bag and pour off the
excess before fitting the filter on the machine. Never use
common engine oil. This would drain through the filter quite
quickly and collect in the bottom.