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English – 17
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.
Correctly adjusted carburetor
A correctly adjusted carburetor 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.
MAINTENANCE
High speed needle H
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.
H
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 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.
NOTE! For optimum setting of the carburetor, contact a
qualified servicing dealer who has a revolution counter at his
disposal.