Operating and maintenance information
ENGLISH 20
11.6 Spark plug information
The spark plug should be regularly checked every 50
operating hours.
• Take off the cowl from the chainsaw.
• Disconnect the spark plug connector which is located
underneath.
• Unscrew the spark plug and dry it thoroughly.
In the event of severe burn-off of the electrodes the
spark plug should be replaced immediately, otherwise
every 100 hours.
The engine must not be moved if the spark plug is
removed or the ignition cable is disconnected.
Otherwise there is a risk that sparks could form which
might cause a fire.
Interference-suppressed replacement spark plugs
(calorific value: 200) are available for example under
the following trade names:
BOSCH WSR6F
CHAMPION RCJ-6Y or equivalent.
The prescribed electrode gap is 0.5 mm.
Before starting work, check the ignition cable to make
sure the connections are in good working order and the
insulation is intact.
• Screw the spark plug back in again.
• Always press the spark plug connector firmly onto
the spark plug.
• Refit the cowl to the chainsaw.
11.7 Shutdown and storage
The chainsaw should be thoroughly cleaned and
checked for damage after every use. The most
important areas are the chain brake, the cooling air
intake area, the cylinder cooling fins and the air filter.
Only use the eco-friendly cleaning agents available
from a specialist retailer. Do not use fuel to clean the
chainsaw.
The chainsaw should be stored in a dry room and fitted
with a chain guard. There must be no naked flames or
similar in the vicinity. Measures must be taken to
prevent unauthorised use of the chainsaw, particularly
by children.
If you plan to stop using the saw for more than four
weeks then you should also drain the fuel tank and the
chain lubrication oil tank in a well vented area and clean
them. Start the engine with the fuel tank empty and run
it until the carburettor is empty and the engine goes out.
Otherwise oil residue from the fuel mixture could block
the carburettor nozzles and make subsequent starts
more difficult.
Important: If you are using bio-chainsaw oil and
planning to stop using the chainsaw for at least 2
months then you should run the chainsaw for a while
with the oil tank filled with engine oil (SAE 30), so that
all residue of the bio-oil is flushed from the tank, oil
pickup hose and cutting device.
11.8 Replacing the fuel filter
We recommend having the fuel filter changed annually
by a specialised service centre.
A trained mechanic can carefully remove the fuel filter
via a wire loop through the fuel tank filler. Ensure that
the thicker part of the fuel hose on the tank wall is not
drawn into the fuel tank.
11.9 Self-help tips
Possible malfunctions:
• The engine will not start.
o Correct starting settings? (E.g. the stop switch)
o Spark plug?
' Clean or replace
o Combustion chamber oversaturated
' Unscrew the spark plug, dry, vent the
combustion chamber
o Old fuel?
' Drain and clean the tank, refuel with fresh
fuel
• The chain will not run
o Chain brake?
• The chain is driven at idle
o Idle speed set too high
o Defective clutch
' Service workshop
• Poor engine performance
o Air filter clogged
' Clean both filters
o Choke not fully open
' Press the choke lever right in.
o Carburettor settings ("L" / "H“ settings)
' Service workshop
• The saw chain is not cutting well
o Chain is blunt / incorrectly sharpened.
' Sharpen the chain correctly
Important operating instructions (summary):
• Before starting:
o Have you filled up with fuel and oil?
o Is the chain tension set correctly?
o Are the starting settings and the chain brake
OK?
' Primer (636, 642, 643IP)
' Choke - part throttle
' Decompression valve (636, 642)
' Stop switch
• While working:
o Is the chain tension set correctly?
o Is the chain lubrication OK?
o Are the idle settings OK?
o Chain brake function test
• After work ! slacken the chain tension
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