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Carburetor Adjustment
1.
Idle Mixture Jet
Disconnect the throttle linkage arm from the governor control arm
and reduce engine speed with the idle stop screw.
Adjust the idle
mixture
screw:
turn
screw clockwise
(in)
until engine
skips;
back screw out (counterclockwise) slowly until engine smooths then
skips again;
turn screw clockwise
(in)
one-quarter to one-half
turn.
Idle mixture should be satisfactory.
NOTE:
Oil pressure switch will need to be jumped to prevent
engine shut-down due to low oil pressure at idle.
2.
Run Mixture Jet (1800 rpm)
the factory and is not adjustable.
can be made in the 1800 rpm range
the governor adjustment can im-
This mixture jet is presized at
The idle mixture jet adjustment
to improve eng ine per formance;
prove engine performance as well.
Governor and Governor Adjustment
The
governor
maintains
engine
speed
under
varying
conditions
of
generator load.
The engine speed determines the frequency and effects
voltage output of the generator.
The governor will maintain engine speed to within 3 Hertz of generator
fr equency ou tput
from no-load
to
full
rated
load of
the gener ator
(Generator Data Plate).
Operate the generator
set to bring the engine up to operating tem-
perature before attempting an adjustment.
NOTE:
If
the
governor
is
severely
out
of
adjustment,
manually adjust the linkage at no load to obtain a safe out-
put voltage before proceeding with the adjustment.
There
are
three
adjusting
points
on
the governor.
illustration. )
(Refer
to the
1.
Increase/Decrease Speed
This adjusting screw is used
to set the no-load speed of
the
eng ine.
(The
linkage
arm between the governor arm
and throttle lever should be
adjusted
to
hold
the
throttle full open when the
engine is not running).
En-
34
Increase/Decrease Speed
Carburetor Throttle Lever
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