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Final setting of the idling speed T
Adjust the idling speed with
the screw T, if it is necessary
to readjust. First turn the idle
speed adjusting screw T
clockwise until the cutting
attachment starts to rotate/
move.
Then turn, counter-clockwise
until the cutting attachment
stops. A correctly adjusted
idle speed setting occurs
when the engine runs
smoothly in every position. It
should also be good margin to
the rpm when the cutting
attachment starts to rotate/
move.
CAUTION! Contact your servicing dealer, if the idle speed
setting cannot be adjusted so that the cutting attachment
stops. Do not use the machine until it has been properly
adjusted or repaired.
High speed needle H
The high speed needle H
influences the power, speed,
temperature and fuel
consumption of the machine.
A too lean adjusted high
speed needle H (high speed
needle H closed too much)
gives overrevs and damages
the engine. Do not let the
machine run at full speed for
more than 10 seconds.
Turn the high speed needle
very slowly clockwise until
engine speed is reduced.
Thereafter turn the high speed
needle very slowly counter-
clockwise and stop when the
engine begins to run roughly.
Then turn the high speed
needle slowly the minimum
amount clockwise until the
engine runs smoothly.
The high speed needle H is
correctly set when the
machine "4-cycles" a little. If
the machine "whistles" the
setting is too lean. If there is
too much smoky exhaust gas
at the same time as the
machine "4-cycles" much, the
setting is too rich.
NOTE! For optimum setting of the carburettor, contact a
qualified servicing dealer who has a revolution counter at
his disposal.
MAINTENANCE
H
Correctly adjusted carburettor
A correctly adjusted carburettor means that the machine
accelerates without hesitation and the machine 4-cycles a
little at max speed. Furthermore, the cutting attachment
must not rotate/move at idling. A too lean adjusted low
speed needle L may cause starting difficulties and bad
acceleration.
A too lean adjusted high speed needle H gives lower power
= less capacity, bad acceleration and/or damage to the
engine.
A too rich adjustment of the two speed needles L and H
gives acceleration problems or too low working speed.
17
English –
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