F’uel
System
..
.
..
_.i
..
CARBURETOR
All
carburetors have a fixed’main jet. An’optional fixed
main jet is avai1abI.e for altitude compensation above
5,000
feet.
The carburetor idle mixture was set for maximum
efficiency at the factory and should normally not
be
disfurbed.
If
adjustments seem necessary, first be sure
the ignition system is working properly and governor
sensitivity is properly adjusted.
The carburetor has a limited idle adjustment range
between stops of
fl/8
turn. The screw should only be
adjusted within these limits; in
to
lean the mixtuie, out
to
richen.
Overtightening the mixture adjustment
screw
will
cause carburetor damage.
Turn mixture adjustment screw in
only
until light
tension can be felt.
If
replacing idle mixture screw, turn in until lightly
seated, then turn sciew back out 1-1
/4
turns. Replace
limiter cap with the plastic
stop
approximately centered.
HIGH
SPEED
STOP
FS-1000-1
GOVERNOR
ASSEMBLY
FIGURE
1.
GOVERNOR SPEED ADJUSTMENT
Carburetor
Speed
Settings
1. Start the engine and allow it
to
warm up thoroughly
“(at least 10 minutes).
Someequipment manufacturers may require higher
throttle stop speed and governor low speed rpm
settings. Refer to equipment manufacturer’s Oper-
ator’s Manual for .the correct rpm settings. When
.
rpm settings are not specified by
the
equipment
manufacturer, use the rpm settings listed in Steps
2
and
3.
2.
Move the engine speed control
to
the slow position.
Adjust the low speed adjustment screw on the
governor
so
the throttle stop screw on the carburetor
controls engine speed. Adjust the throttle stop
screw for
1000
rpm idle (Figures
1
and
2).
3.
Adjust the governor low speed stop for 11
00
rpm
idle.
-..
_.
..
4.
Move the engine speed control
to
the fast position.
Bend the high speed stop on the governor
so
the
engine. runs at the equipment manufacturer’s
recommended speed.
.-
LIMITER
CAP-
FS-1406.2
FIGURE
2.
CARBURETOR ADJUSTMENTS
To Next Page
Loading...
