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MAINTENANCE
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.
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
Air filter
The air filter should be
cleaned regularly removing
dust and dirt to avoid:
• carburetor malfunction
• starting problems
• reduced engine power
• unnecessary wear to
engine parts
• abnormal fuel
consumption
Clean the filter after every
25 hours or more regularly
if operating conditions are
exceptionally dusty.
Cleaning the air filter
Dismantle the air filter
cover and remove the air
filter. Wash in clean, warm
soapy water. Ensure that the
filter is dry before refitting. An air filter used for a long period
of time can never be cleaned completely. Therefore it is
necessary to replace the filter from time to time with a new
filter. A damaged air filter must always be replaced.
• See the cutting
equipment’s packaging
for correct filing
instructions.
• The blades are sharpened
using a single cut flat file.
• Sharpen all edges equally
to maintain the balance
of the blade.
!
WARNING!
Always discard a blade that is bent,
twisted, cracked, shattered or damaged in
any other way. Never attempt to straighten
a twisted blade for use again. Only use
original blades of the prescribed type.
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.
!
WARNING!
Always stop the engine before starting
work on any part of the cutting equipment.
This continues to rotate even after the
throttle has been released. Ensure that the
cutting equipment has stopped completely
and remove the cable from the spark plug
before you start to work on it.
Filing the grass blade