20 –
English
Maintenance
Replacing the air filter
If the engine seems to lack power or does not run smoothly
this may be because the air filter is clogged. It is therefore
important to replace the air filter at regular intervals (see
Maintenance/Maintenance Schedule for the correct service
interval).
Replace the air filter as follows:
1
Loosen the knobs holding the filter cover in place and
remove it.
2
Remove the filter cartridge from the filter housing.
3
Clean the filter by knocking it with care against a hard
surface. Do not use compressed air to clean the filter.
Replace the air filter if it is still dirty.
Always replace the paper filter every 200 hours.
4
Check, clean or replace the foam plastic filter. Clean the
pre-filter by washing it with water and detergent.
5
Dry the pre-filter properly.
6
Put the pre-filter and paper filter back into the air filter unit.
Make sure the filter cartridge is correctly centred in the
slot.
7
Refit the air filter cover.
Ignition system
The engine is equipped with an electronic ignition system.
Only the spark plug requires maintenance.
For recommended spark plug, see Technical data.
Replacing the spark plug
1
Remove the ignition cable shoe and clean around the
spark plug.
2
Remove the spark plug with a 3/4” (19 mm) spark plug
socket wrench.
3
Check the spark plug. Replace the spark plug if the
electrodes are burned or if the insulation is cracked or
damaged. Clean the spark plug with a steel brush if it is to
be reused.
4
Measure the electrode gap with a gapping tool. The gap
should be 0.75 mm/0.030”. Adjust as necessary by
bending the side electrode.
5
Reinsert the spark plug, turning by hand to avoid
damaging the threads.
6
Tighten the spark plug, once it touches the seating, with
the spark plug spanner. Tighten the spark plug so that the
washer is compressed. A used spark plug should be
turned 1/8 of a turn from the seated position. A new spark
plug should be turned a 1/4 turn from the seated position.
7
Replace the ignition cable shoe.
Check the safety system
The machine is equipped with a safety system that prevents
starting or driving under the following conditions.
The engine can only be started when:
•
The cutting deck is raised and the parking brake is
applied.
The engine should stop when:
•
The cutting deck is lowered and the driver rises from the
seat.
•
The cutting deck is in its raised position, the parking brake
is not applied and the driver rises from the seat.
Check daily to ensure that the safety system works by
attempting to start the engine when one of the conditions
above is not met. Change the conditions and try again.
!
WARNING! The exhaust system is hot. Let it
cool before starting to replace the air filter.
IMPORTANT INFORMATION
Never run the engine without the air filter fitted.
IMPORTANT INFORMATION
Fitting the wrong spark plug type can damage the engine.
IMPORTANT INFORMATION
Inadequately tightened spark plugs can cause overheating
and damage the engine. Tightening the spark plug too
much can damage the threads in the cylinder head.