ADJUSTMENTS
CENTRIFUGAL
SWITCH
The start-disconnect centrifugal switch (Figure 15)
is
located
on the
gear cover
on the
side
of
the
engine
above the
oil
filter. The switch opens when the engine
stops
and
closes when engine speed reaches about
900 rpm.
If
necessary, loosen theMationary contact
and adjust
the
point
gap at
{TcMC^inch. Replace
burned
or
faulty points.
rt
GOVERNOR
The governor controls engine speed. Rated speed
and voltage appear
on the
nameplate
(see
also
Specifications). Engine speed equals frequency mul-
GOVERNOR
ARM
SENSITIVITY
ADJUSTING
RATCHET
DECREASE
SENSITIVITY
GOVERNOR STUD
DECREASE
/ SPEED
J
^fr ^INCREASE
/\ SPEED
SPEED
ADJUSTING
NUT
CITY WATER COOLED
GOVERNOR
ARM
SPEED
ADJUSTING
NUT
AND LOCK
NUT
GOVERNOR
STUD
GOVERNOR
SHAFT
DECREASE
SENSITIVITY
RADIATOR COOLED
FIGURE
16.
ADJUSTING GOVERNOR
CENTRIFUGAL
SWITCH
BREAKER POINTS
SET GAP
AT
FIGURE
15.
ADJUSTING BREAKER POINTS
tiplied by
30,
on a 4 pole generator, thus 1800 rpm give
60 hertz frequency. Preferred speed does
not
vary
more than
3
hertz from no-load to full-load operation.
Be sure throttle, linkage,
and
governor mechanism
operate smoothly.
Speed Adjustment:
To
change
the
governor speed,
change
the
spring tension
by
turning
the
governor
spring
nut
(Figure 16). Turn
the nut
clockwise (more
spring tension)
to
increase
RPM and
counterclockwise
to
reduce governed speed. Hold
a
tachometer against flywheel
cap
screw.
Sensitivity Adjustment:
To
adjust governor sensitivity
(no load
to
full load speed droop) turn the sensitivity
adjusting ratchet accessible through
a
covered
access hole
on the
side
of the
blower housing.
Counterclockwise.gives more sensitivity (less speed
drop when full load
is
applied), clockwise gives less
sensitivity (more speed drop).
If
the
governor
is too
sensitive,
a
rapid hunting condition occurs (alternate
increasing
and
decreasing speed). Adjust
for
max-
imum sensitivity without hunting. After sensitivity
adjustment, the speed will require readjustment. After
adjusting
the
governor, replace
the
knockout plug
in
the blower housing
and
secure speed stud lock
nut.
Excessive droop
may be
caused
by
engine misfiring. Correct this
condition before adjusting governor.
CHARGE RATE
ADJUSTMENT
The adjustable resistor slide
tap (in the
charging
circuit)
is
set
to
give approximately
2
ampere charg-
ing rate.
For
applications requiring frequent starts,
check battery specific gravity periodically
and, if
necessary, increase
the
charging rate slightly .(move
slide
tap
nearer ungrounded lead) until
it
keeps
the
21
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