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Cleaning and replacing the air filter (Illustration W )
IMPORTANT
Never let the engine start or run whilst the air filter is removed.
SA322020
–
Open the cover (1), pull down and out and remove.
–
Remove the paper filter insert (2) and pre-filter (3). To remove the pre-filter from
the cover, remove the grid (4) first.
–
Clean the paper filter insert every 50 operating hours
Knock gently onto a smooth surface if soiled lightly. Replace if heavily soiled or
damaged. Do not wash out paper filters, nor blow them out with compressed air or
grease them.
–
Clean the pre-filter every 50 operating hours.
Wash pre-filters in hot water with liquid detergent, rinse them out in clean water,
press out excess water and allow to dry thoroughly in air. Do not lubricate the pre-
filter with oil.
–
After cleaning or replacement, insert the filter element into the air filter plate, insert
the pre-filter in the cover and fix in place with the grid.
–
Insert the hooks (5) on the cover (1) into the seat (6) at the bottom in the air filter
plate.
–
Tilt the cover upwards and close with care.
In the case of unfavourable operation conditions (severe formation of dust), cleaning is
required after every mowing process. Replace the paper filter element and pre-filter
annually or every 100 operation hours.
(Please see original spare parts and accessories for order no. of filter element)
SA322120
–
Loosen the nut (1) on the air filter cover (2) and remove the cover.
–
Remove the pre-filter (3) and paper filter element (4).
–
Clean the paper filter element every 50 operating hours.
Knock gently onto a smooth surface if soiled lightly. Replace if heavily soiled or
damaged. Do not wash out paper filters, nor blow them out with compressed air or
grease them.
–
Clean the pre-filter every 50 operating hours.
Wash pre-filters in hot water with liquid detergent, rinse them out in clean water,
press out excess water and allow to dry thoroughly in air. Do not lubricate the pre-
filter with oil.
–
Insert the dry pre-filter on the paper filter element and fit both in the air filter plate
(5). Ensure that the air filter sits firmly in the plate.
–
Put the cover (2) on the air filter and fasten it with the nut (1) on the air filter plate
(5).
In the case of unfavourable operation conditions (severe formation of dust), cleaning is
required after every mowing process. Replace the paper filter element and pre-filter
annually or every 200 operation hours.
(Please see original spare parts and accessories for Order No. of filter element and pre-
filter)
Checking the spark plug (Illustration Y )
SA322020
To check for wear, remove the spark plug connector and unscrew the spark plug. If the
electrode is badly worn the spark plug must be replaced as a matter of course. (Order
no. see original spare parts list and accessories).
Otherwise it is sufficient to clean the spark plug and set the electrode gap to 0.6-0.7
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.
SA322120
To check for wear, remove the spark plug connector and unscrew the spark plug. If the
electrode is badly worn the spark plug must be replaced as a matter of course. (Order
no. see original spare parts list and accessories).
Otherwise it is sufficient to clean the spark plug and set the electrode gap to 0.5 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.
All models
Correct winter storage of the engine (or when not used for a long period
of time)
–
Empty the petrol tank or allow the engine to run until it stops due to lack of fuel.
–
Switch off engine and disconnect spark plug cable.
–
Drain off the oil while the engine is still warm. Fill with fresh oil (for quantity and
type, see technical data).
–
Clean grass and chaff from cylinder and cylinder head fins and around muffler.
–
Always keep the machine in a clean condition in a closed, dry room out of reach of
children.
18 TROUBLESHOOTING
Fault
Possible cause
Control handle not
Engine does not start
turned down.
up
Fuel tap closed (only for
model SA322020).
Fuel tank empty.
Spark plug connector
loose.
Spark plug defective or
soiled or electrodes worn
out.
Too much petrol feed to
engine (spark plug wet).
Air filter soiled.
Air filter soiled.
Engine power
decreasing
Spark plug clogged with
soot.
Fuel old or soiled
Air filter dirty.
Engine runs irregularly
Spark plug contaminated
with soot.
Pull drive control bar not
Mower does not work
pulled.
Drive speed cannot be
regulated
Extreme vibration
Cutting blade blunt.
Cut not clean,
lawn turns yellow
Cutting height too low.
Motor speed too low.
Mowing speed too high.
Insufficient overlap
between mowing lanes.
Lawn matted.
Cutting blade blunt.
The mulched grass
does not look good:
clumps, excessive cut
material, coarse cut
Mulching rule ignored
(cut max. 1/3 of grass
height; the grass height
to be cut must be less
than 10 cm)
Driving speed too high.
11
Remedy
Press the control handle onto
the upper part of the bar D .
Open the fuel tap A .
Fill up with clean and fresh
fuel.
Push plug connector in place
or have it checked by an
authorised workshop.
Replace or clean spark plug,
set electrode distance Y .
0.6-0.7 mm (for model
SA322020)
0.5 mm (for model
SA322120).
Have it checked by an
authorised workshop.
Clean or replace the air filter
insert W .
Clean or replace the air filter
insert W .
Have it checked by an
authorised workshop.
Empty the petrol tank and fill
with fresh petrol.
Clean or replace air filter
insert W .
Have it cleaned by an
authorized dealer.
Pull drive control bar G .
Have it checked by an
authorised workshop.
Have it checked by an
authorized dealer
Have it checked by an
authorized dealer
Have it sharpened and
balanced by an authorised
workshop Q .
Set higher cutting height I .
Have it checked by an
authorized dealer
Adapt mowing speed, switch
motor drive off if necessary.
If grass is long, the mowing
lanes may need to overlap
further.
A perceptible improvement
can be achieved by using a
scarifier.
Have it sharpened and
balanced by an authorised
workshop.
Set higher cutting height I .
Adapt driving speed, switch
motor drive off if necessary.
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