Husqvarna 535LST Operator's Manual page 16

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 19 .
• 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.
To clean the air filter
CAUTION: A air filter that is damaged, very
dirty or soaked with fuel must always be
replaced.
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.
16
1. Move the choke lever up, to close the choke valve.
2. Remove the air filter cover and remove the air filter.
Technical data
3. Clean the air filter with warm soap water. Make sure
4. Replace the air filter if it is too dirty to fully clean it.
5. Also clean the inner surface of the filter cover. Use
6. Do a check of the rubber sealing surface. Replace
7. Make sure that the filter is dry before you assemble
Bevel gear
The bevel gear is filled with the right quantity of grease
at the factory. But, before you use the product, make
sure that the bevel gear is 3/4 full with grease. Use
Husqvarna special grease.
The grease in the bevel gear does not need to be
changed unless repairs are carried out.
that the air filter is dry 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.
1011 - 002 - 01.02.2019