1. Operate the product until the fuel tank is empty.
2. Remove the ignition cable from the spark plug.
3. Remove the oil tank cap.
4. Put a container below the product to collect the
engine oil in.
5. Tilt the product to drain the engine oil from the oil
tank.
6. Fill with new engine oil of the type recommended in
Technical data on page 18
.
7. Do a check of the oil level. Refer to
To do a check of
the oil level on page 14
.
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
Technical data
on page 18
. (Fig. 40)
• Replace the spark plug if it is necessary.
Air filter
A dirty air filter can cause the engine to be damaged or
not operate correctly. Do maintenance on the air filter
more frequently in dusty conditions. Refer to
Maintenance on page 13
for information about when to
replace the air filter.
Note:
Always replace a damaged air filter.
To remove and install the air filter
WARNING: Use protective gloves.
1. Push the clips on the air filter cover.
2. Carefully remove the air filter cover (A) from the
engine.
3. Remove the air filter (B). (Fig. 41)
4. Examine the air filter for damages. Replace a
damaged air filter.
5. Clean and examine the air filter. Refer to
To clean
the air filter on page 15
.
6. Install in the opposite sequence.
To clean the air filter
A dirty air filter can cause the engine to be damaged or
not operate correctly. Do maintenance on the air cleaner
more frequently in dusty conditions.
See
Maintenance on page 13
for information about
when to replace the air filter.
1. Remove the air filter cover and remove the filter.
2. Clean the filter by hitting it against a flat surface. Do
not use solvent with petroleum, kerosene or
compressed air to clean the filter.
Note: Air filters in operation for a long time cannot be
cleaned fully. Replace the air filter at regular
intervals. Damaged air filters must always be
replaced.
3. When you assemble the air filter, make sure that it
fully seals against the filter holder.
To do a check of the side discharge
deflector
The side discharge deflector is attached to the side
discharge opening of the product. It decreases the risk
of objects to eject in the direction of the mow position of
the operator.
1. Make sure that the side discharge deflector is not
damaged.
2. Examine the side discharge deflector. Make sure
that you do not see defects, such as cracks or
broken springs that push the door to close.
3. Replace the side discharge deflector or the springs if
they are damaged.
To examine the fuel system
• Examine the fuel tank cap and the seal for the fuel
tank cap to make sure that there are no damages.
• Examine the fuel hose to make sure that there are
no leaks. If the fuel hose is damaged, let a service
agent replace it.
To adjust the clutch wire (LC 151S, LB
251S, LB 256SP)
For the situations that follow, it is necessary to decrease
the length of the clutch wire:
• The drive of the wheels does not engage when you
pull the drive bail or the speed control lever.
• The product moves slowly when the drive of the
wheels is engaged.
For the situations that follow, it is necessary to extend
the length of clutch wire:
• The product moves when the drive of the wheels is
not engaged.
• Adjust the clutch wire.
1566 - 003 - 26.10.2020
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