Specifications

19
IDLE SPEED
ADJUSTMENT
HIGH SPEED
ADJUSTMENT
8
HOLDING
SCREW
9
STATIC GOVERNOR
ADJUSTMENT SCREW
IDLE RPM
ADJUSTMENT
SCREW
HIGH
SPEED RPM
ADJUSTMENT
SCREW
10
2-Cycle Engine Speed and Governor Adjustments: TVS/TVXL840
Linkage Location
To aid in the proper reassembly of the governor linkage,
mark the linkage locations.
Static Governor Adjustment
To adjust the static governor, loosen the holding screw,
rotate the governor arm and slotted shaft in the direction
that will open the throttle to the wide open position, and
then re-tighten the holding screw.
The HXL840 - 870 Series with variable speed control
have the following adjustments. Idle speed is set at
the carburetor crack screw. High speed is set with the
screw shown above. Always check Microfiche card 30
or Parts Manager Pro computer program for correct
speed settings.
R.P.M. adjustment of fixed speed models is done by
bending the tab as shown.
Governors and Linkage for Air Vane
HSK/HXL840-870/TH139
Rotate sleeve clockwise to increase R.P.M., counter-
clockwise to decrease R.P.M.
NOTE
The sleeve is serrated to rotate in a clockwise direction
and must be raised using the sleeve tabs before it can
be rotated counterclockwise.
To disassemble, remove choke shutter with needle-
nose pliers; the vane assembly may then be removed
from the carburetor.
11
BEND TAB
DECREASE
INCREASE
12
VANE ASSEMBLY
TO ADJUST HIGH-SPEED
ROTATE
CLOCKWISE TO
INCREASE
COUNTERCLOCKWISE
TO DECREASE
HORIZONTAL FIXED SPEED
PLASTIC AIR VANE GOVERNOR
13
BEND TAB TO
ADJUST RPM
INCREASE
DECREASE
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