Spark Plug; Fuel Filter; Air Filter; Angle Gear - Husqvarna 426EX Operator's Manual

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 0,6-0,7 mm.
The spark plug should be replaced after about a month in
operation or earlier if necessary.
0,6 - 0,7 mm
CAUTION! Always use the recommended spark plug
type! Use of the wrong spark plug can damage the piston/
cylinder. Check that the spark plug is fitted with a
suppressor.
Fuel filter
When the engine runs short of fuel supply, check the fuel
cap and the fuel filter for blockage.
18 – English
MAINTENANCE
Air filter
The air filter must be regularly cleaned to remove dust
and dirt in order to avoid:
• Carburettor malfunctions
• Starting problems
• Loss of engine power
• Unnecessary wear to engine parts
• Excessive fuel consumption.
Clean the filter every 25 hours, or more regularly if
conditions are exceptionally dusty.
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.

Angle gear

There is a grease nipple on the gearbox. Use a grease
gun to top up with grease. This should be carried out after
approximately every 25 working hours. Use Husqvarna
special grease.
CAUTION! When removing and installing the drive disc,
use care not to allow any dirt and dust entering into the
gear case.