Cleaning And Replacing The Air Filter (Figure W ); Checking The Spark Plug (Figure Y ); Correct Winter Storage Of The Engine (Or When Not Used For A Long Period Of Time); Troubleshooting - Sabo 53-M VARIO Betriebsanleitung

– Before the engine or the device is tilted to drain oil, empty the petrol tank and let
the engine run until it stops due to lack of fuel.
– Stop the engine and remove the spark plug connector.
– Change the oil as long as the engine is warm.
– For oil change, remove the dipstick from the oil filling nozzle.
- Place the mower to the side so that the spark plug side is at the top and the waste
oil is drained into a collecting vessel.
Do not drain used oil into the sewage system or soil; dispose of it according
to the local regulations.
– Put up the mower and fill in brand oil at the connector (for quantity and quality
refer to the technical data). Screw in the dipstick and check the oil level
(see "Checking the oil level" and "Filling with oil", figure Y1)! If the oil level
is correct, insert the dipstick and tighten it.

Cleaning and replacing the air filter (figure W )

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IMPORTANT
Never let the engine start or run whilst the air filter is removed.
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– Loosen the air filter cover lock (4) with a screwdriver from the air filter housing (1)
and remove the air filter cover (3).
– Remove the filter (2).
– Clean the filter every 50 operational hours.
In case of minor contamination, tap out gently on a smooth surface. In case of
severe contamination or damage, renew the filter(s). Do not wash out or blast out
the paper filter using compressed air and do not oil it.
– Insert the filter (2). Slide the dry pre-filter on the paper filter element and insert both
in the air filter plate (5). Make sure that the air filter is securely fitted in the plate.
– Attach the air filter cover (3) onto the filter and let the air filter cover lock (4)
engage in the air filter housing (1).
In the case of unfavourable operation conditions (severe formation of dust),
cleaning is required after every mowing job. Replace the air filter annually or
every 200 operating hours.
(Please see original spare parts and accessories for order no. of filter element and
pre-filter)
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Checking the spark plug (figure Y )

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To check for wear, remove the spark plug connector and screw out the spark plug.
If the electrode is badly worn, the spark plug must be replaced as a matter of course
(for order no. see original spare parts list and accessories).
Otherwise it is sufficient to clean the spark plug with a steel brush and set the electrode
gap to between 0.7 – 0.8 mm. Screw the spark plug (pay attention to sealing ring) into
the engine by hand and tighten using the socket wrench. Press on spark plug
connector. Replace the spark plug annually.
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Correct winter storage of the engine (or when not used for a long period
of time)
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– Empty the petrol tank and let the engine run until it stops due to lack of fuel.
– Stop the engine and remove the spark plug connector.
– Drain the oil as long as the engine is still warm. Fill in fresh oil (for quantity and
quality refer to the technical data).
– Remove grass and mowing deposits from the cylinder and cylinder ribs,
under the engine cover and around the silencer.
– Always keep the device in a clean state in a closed, dry room and inaccessible to
children.

18 TROUBLESHOOTING

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Faults Possible causes
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Safety grip not pressed
Engine does not start
down.
Fuel tank is empty.
Spark plug connector
loose.
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Engine power
decreasing
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Engine runs irregularly
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Extreme vibration
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Travel speed cannot be
adjusted
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Mower does not run
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Mower does not run
on slope (clutch is
slipping)
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Poor cutting, lawn
turns yellow
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The mulched grass
looks bad: lumps,
Remedy
excessive amounts of
cut grass, coarse cut
Press the control bar to
the upper part of the
handlebar D .
Fill the fuel tank with clean
and fresh fuel.
Press on spark plug
connector or have it checked
by an authorised workshop.
11
Spark plug defective or
Replace or clean the
dirty or electrode burnt
spark plug, set the
out.
electrode gap to between
0.7 mm – 0.8 mm Y .
Excessive petrol
Have it checked by an
supply to engine
authorised workshop.
(spark plug wet).
Air filter soiled.
Clean or replace the air filter
insert W .
Air filter soiled.
Clean or replace the air filter
insert W .
Spark plug clogged with
Have it checked by an
soot.
authorised workshop.
Fuel old or soiled
Empty the petrol tank and fill
with fresh fuel.
Air filter soiled.
Clean or replace the air filter
insert W .
Spark plug clogged
Have it checked by an
with soot.
authorised workshop.
Engine cooling fins
Clean the engine cooling fins.
contaminated
Have it checked by an
authorised workshop.
Have it checked by an
authorised workshop.
Have it checked by an
authorised workshop.
Autodrive control bar not
Pull up the autodrive
pulled up.
control bar G .
Have it checked by an
authorised workshop.
Pretension of Bowden
Have the Bowden drive cable
cable spring too low
set by an authorised
workshop.
Cutter bar blunt.
Have it reground and
balanced by an authorised
workshop.
Cutting height too low. Set higher cutting height V3 .
Engine speed too low.
Have it checked by an
authorised workshop.
Excessive mowing
Adjust the mowing speed and
speed.
switch off the autodrive, if
necessary.
Mower paths do not
With high grass, the mowing
overlap sufficiently.
paths may possibly have to
overlap more.
Lawn matted.
A noticeable improvement
can be achieved by using a
scarifier.
Cutter bar blunt. Have it reground and
balanced by an authorised
workshop.
Mulching rule not Set higher cutting height V3 .
followed (cut max. 1/3 of
grass height; the grass
height to be cut must be
less than 10 cm).
Excessive travel speed. Adjust the travel speed,
switch off the autodrive,
if necessary.
Grass accumulation Set higher cutting height V3 .
under the mower.