10 Maintenance
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1. Remove the wing nuts and air cleaner cover.
2. Remove and separate the air cleaner cartridge.
3. Check both applications for holes and cracks and replace if damaged.
Foam insert:
Wash out the insert in a solution of household detergent and warm water and then rinse thoroughly.
Allow the insert to dry and tip into clean motor oil. Press out excessive oil. If too much oil remains in the
insert, the engine will smoke during its first start.
Paper insert:
Gently tap the insert several times against a hard surface to remove excess grime. Blow compressed air
from the inside to the outside through the filter. Do not brush the dirt off as it will get pressed into the
fibers.
In the event of extreme dirt accumulation, replace the insert.
10.2.5 Screwed connections
For the vibratory plates, the screwed connections must be regularly checked for a firm seat.
10.2.6 Spark plug maintenance
To ensure proper engine operation, the spark plug must have the correct spark plug air gap and be free
of combustion residues.
1. Remove the spark plug cap and unscrew the spark plug with a spark plug wrench
2. Visually inspect spark plug. If the isolator is broken or splintered, replace spark plug. Clean spark plug
with a wire brush if it is to be re-used. For the spark plug model, see chapter
Technical Data
.
3. Measure the spark plug air gap with a thickness gauge. For the spark plug air gap, see chapter
Technical Data
. If necessary, correct the air gap by bending the side electrodes.
4. Check whether the spark plug seal ring is in a good condition.
5. Screw in the spark plug by hand to avoid cross-threading.
6. After fitting, tighten spark plug with a spark plug wrench to compress the seal ring.
CAUTION
Do not run the engine without an air filter. This will quickly lead to engine wear.
CAUTION
Do not use spark plugs with the wrong thermal value.
WARNING
Risk of burns
The muffler is very hot if the engine had just been running. Do not touch the muffler.
NOTICE
After it has been attached, a new spark plug must be rotated a 1/2 turn in order to
compress the seal ring. If the old spark plug is re-used, a 1/8–1/4 turn is enough to
compress the seal ring.
CAUTION
The spark plug must be tightened correctly. An insufficiently tightened spark plug can
become very hot and cause engine damage.
