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English – 17
MAINTENANCE
H
needle. The high speed needle is adjusted correctly when the
machine ‘splatters’ a little . If the machine smokes heavily at
the same time as it ‘splatters’ heavily the adjustment is too rich.
The high speed needle
affects the machine’s power,
speed, temperature and fuel
consumption. A too lean
adjustment on the high
speed needle H (the high
speed needle H is screwed
in too much) gives a too
high speed resulting in
engine damage. Do not
allow the engine to run at
full speed for more than 10
seconds.
Apply full throttle and turn
the high speed needle H
slowly anticlockwise until
the engine runs unevenly.
The high speed needle H is
then turned slowly
clockwise a little until the
engine runs smoothly.
Note the engine should be
run unloaded when
adjusting the high speed
needle. Therefore
dismantle the cutting
equipment, nut, support
flange and disc drive before
adjusting the high speed
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.
NOTE! For optimum setting of the carburettor, contact a
qualified servicing dealer who has a revolution counter at his
disposal.
High speed needle 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.