Spark Plug; Bevel Gear; Sharpening Grass Cutters And Grass Blades; Air Filter - Husqvarna 129RJ Operator's Manual

WARNING: Mufflers fitted with catalytic
converters get very hot during use and
remain so for some time after stopping.
This also applies at idle speed. Contact
can result in burns to the skin. Remember
the risk of fire!
WARNING: The inside of the muffler
contain chemicals that may be
carcinogenic. Avoid contact with these
elements in the event of a damaged
muffler.
WARNING: Engine exhaust fumes
contain carbon monoxide, which can
cause carbon monoxide poisoning. Do
not start or run the machine indoors, or
anywhere that is poorly ventilated.
The exhaust fumes from the engine are
hot and may contain sparks which can
start a fire. Never start the machine
indoors or near combustible material!

Spark plug

The spark plug condition is influenced by:
• incorrect carburetor adjustment.
• an incorrect fuel mixture (too much or incorrect
type of oil).
• a dirty air filter.
These factors cause deposits on the spark plug
electrodes, which may result in operating problems
and starting difficulties.
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
electrode gap is 0.024 inch (0.6 mm). The spark
plug should be replaced after about a month in
operation or earlier if necessary.
CAUTION: Always use the recommended spark
plug type. Use of the wrong spark plug can
damage the piston/cylinder.

Air filter

The air filter must be regularly cleaned to remove
dust and dirt in order to avoid:
carburetor malfunctions
•
starting problems
•
loss of engine power
•
unnecessary wear to engine parts
•
MAINTENANCE
excessive fuel consumption
•
Clean the filter every 25 hours, or more regularly if
conditions are exceptionally dusty.
Cleaning the air filter
Remove the air filter cover and take out the filter.
Wash it clean in warm, soapy water. Rinse
thoroughly. Ensure that the filter is dry before
refitting it.
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.

Bevel gear

The bevel gear is filled with the right quantity of
grease at the factory. However, before using the
machine you should check that the bevel gear is
filled three-quarters full with grease. Use special
grease. The grease in the bevel gear does not
normally need to be changed except if repairs are
carried out.
Sharpening grass cutters and grass
blades
WARNING: Always stop the engine
before doing any work on the cutting
attachment. This continues to rotate even
after the throttle has been released.
Ensure that the cutting attachment has
stopped completely and disconnect the
lead from the spark plug before you start
to work on it.
• See the cutting attachment packaging for
correct sharpening instructions.
• Sharpen blades and cutters 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, broken or
damaged in any other way. Never attempt
to straighten a twisted blade so that it can
be reused. Only use original blades of the
specified type.