Fuel Filter; Air Filter - Husqvarna 426LST Manuel D'utilisation

B
• Make sure that the cooling system is not dirty or
blocked.
• Clean the cooling system with a brush weekly or
more frequently if it is necessary.
To examine the spark plug
CAUTION: Always use the recommended
spark plug type. Incorrect spark plug type
can cause damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
on page 18 .
• Replace the spark plug if it is necessary.

Air filter

Remove dust and dirt from the air filter to keep it clean in
order to prevent:
• Carburettor malfunctions.
• Starting problems.
• Loss of engine power.
• Unnecessary wear to engine parts.
• Too much fuel consumption.
Clean the air filter at an interval of 25 hours, or more
regularly if conditions are unusually dusty.
16
To clean the air filter
A
If you use an air filter for a long time it cannot be fully
cleaned. Replace the air filter with a new one at regular
intervals.
B
1. Remove the air filter cover and remove the air filter.
2. Clean the air filter. Make sure that the air filter is dry
3. Replace the air filter if it is too dirty to fully clean it.
4. Also clean the inner surface of the filter cover. Use
5. Do a check of the rubber sealing surface. Replace
6. Make sure that the filter is dry before you assemble
Technical data

Fuel filter

When the engine runs short of fuel, make sure that the
air hole in the fuel tank cap and the fuel filter (A) are
clean.
CAUTION: A air filter that is damaged, very
dirty or soaked with fuel must always be
replaced.
before you install it.
Always replace a damaged air filter.
air or a brush.
the filter on the rubber seal if it is damaged.
it.
A
1189 - 001 - 08.07.2019