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Carburetor
adjustment
(Fig. 31)
24
Fig. 30
For models with an engine ignition switch, keep the
ignition switch pressed until the engine comes to a
complete stop.
WARNING
A cutting
attachment
can
injure
while
it
continues to spin after the engine is stopped
or power control is released. When the unit is
turned off, make sure the cutting attachment
has stopped before the unit is set down.
Semi-auto
cutting head
O When cutting, operate engine at over 6,500 rpm.
Extended
time of use at low rpm may wear out
the clutch prematurely.
O Cut grass from right to left.
O Cut grass from left to right (only curve shaft
model).
_, WARNING
A cutting
attachment
can
injure
while
it
continues to spin after the engine is stopped
or power control is released. When the unit is
turned off, make sure the cutting attachment
has stopped before the unit is set down.
Automatically
feeds more nylon cutting line when it is
tapped at low rpm (not greater than 4,500 rpm).
MAINTENANCE
MAINTENANCE,
REPLACEMENT
OR
REPAIR
OF THE
EMISSION
CONTROL
DEVICES
AND
SYSTEMS
MAY BE PERFORMED
BY ANY NON-
ROAD
ENGINE
REPAIR
ESTABLISHMENT
OR
INDIVIDUAL.
Fig. 31
WARNING
•
The
cutting
attachment
may
be
spinning
during carburetor adjustments.
•
Never start the engine without the complete
clutch cover and tube assembled!
Otherwise
the
clutch
can
come
loose
and
cause
personal injuries.
In the carburetor, fuel is mixed with air. When the
engine is test run at the factory, the carburetor
is
basically
adjusted.
A further
adjustment
may be
required,
according
to climate
and altitude.
The
carburetor has one adjustment possibility:
T = Idle speed adjustment
screw.
Idle speed adjustment
(T)
Check that the air filter is clean. When the idle
speed is correct, the cutting attachment will not
rotate. If adjustment is required, close (clockwise)
the T-screw,
with the engine
running, until the
cutting attachment starts to rotate. Open (counter-
clockwise) the screw until the cutting attachment
stops. You have reached the correct idle speed
when the engine runs smoothly in all positions well
below the rpm when the cutting attachment starts to
rotate.
If the cutting attachment still rotates after idle speed
adjustment, contact your Hitachi dealer.
NOTE
Standard Idle rpm is 2,800 - 3,200 rpm.
/_ WARNING
When
the
engine
is
idling
the
cutting
attachment
must
under
no circumstances
rotate.
14
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