Assembly
group
4
ADJUSTMENT INSTRUCTIONS-MECHANICAL
Special JLO Tools
Vibration tachometer 000.15.300.100
STOP-, IDLE-, AND NO-LOAD ADJUSTMENT with the blade fitted
NOTE
:
Check main and idle jet of carburettor for cleanliness. Set air adjusting screw
(7)
(it should be set 1/2 a turn out).
Preparations:
1. Move both speed lever (1) and throttle lever on mower handle into "Run"
(Max.) position.
2. Hook piano wire
(3)
into lever (1) using the original hole position
(2).
Lightly retain the outer cable by means of screw (19) and clamp
(4).
Adjustment of No-Load Speed (throttle wide open):
3.
Hook spring (11) into lever (1) for initial adjustment. (Required no-load
rpm refer to table).
4.
Hold lever (1) in RUN (Max.) position and tighten Nylock nut
(5)
so
that the
spring (11) can just move the lever (1).
5.
Start engine (take all safety rules into consideration). Check speed with
tachometer, and if necessary adjust by bending spring retainer on governor
lever
(6)
into
+
or
-
direction. (Refer to illustration and table).
NOTE
:
Bending into
+
direction
=
engine runs faster
Bending into
-
direction
=
engine runs glower
(max.
-
3.00
mm
corresponds to approx.
-
100 rpm)
There is no gap between damping spring and housing at no load rpm
6.
If engine tends to hunt at no-load speed, screw out damping spring (9) until
engine stops hunting.
Adjustment
of
Idle Speed:
7.
Move speed lever (1) into "Idle" (Min.) position.
NOTE
:
In this position lever and short circuit contact must still have a gap
of
1
mm.
8.
Set the idle speed to 1200-1300 rpm by adjusting carburettor idle set screw
(8).
9. Move speed lever (1) into "Stop" position. In this position the lever (1)
must touch the short circuit contact (10). If necessary, loosen clamp screw
(12) at and adjust outer cable (3).
NOTE
:
Change carburettor jets for operation in higher areas. Following a rule
of
thumb
every
3000
ft. of altitude above sea level, the main jet should be reduced
by
one
size. These modifications do not affect the other jets and adjustments.
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