Kohler K91 Service Manual page 43

CLEANING
£
WARNING: Flammable Solvents I
Carburetor cleaners and solvents are extremely
flammable. Keep sparks, flames and other sources
of ignition away from the area. Follow the cleaner
manufacturer's warnings and instructions on its
proper and safe use. Never use gasoline as a
cleaning agent.
All parts should be carefully cleaned using a car­
buretor cleaner (such as acetone) . Be sure all
gum deposits are removed from the following
areas :
Carburetor body and bore;
•
areas where the throttle plate . choke plate .
and shafts are seated .
Idle fuel and "off-idle" ports i n carburetor
•
bore, main jet, bowl vent, and fuel inlet seat.
NOTE: These areas can be cleaned using a piece
of fine wire in addition to cleaners . Be careful not
to enlarge the ports, or break the cleaning wire
within ports . Blow out all passages with com­
pressed air .
Float and float hinge.
•
Fuel Bowl.
•
Throttle plate, c hoke plate, throttle shaft,
•
and choke shaft.
CAUTION : Do not submerge the carburetor in cleaner
or solvents when fiber. rubber, or foam
seals or gaskets, or the fuel inlet needle
are installed . The cleaner may damage
these parts.
I N SPECTION
Carefully inspect all components and replace those
that are worn o r damaged .
•
Inspect the carburetor body for cracks , holes ,
and other wear o r damage.
•
Inspect the float for cracks or holes . Check
the float hinge for wear, and missing or dam­
aged float tabs.
•
Inspect the fuel inlet needle for wear or
grooves.
•
I n spect the tip of the idle fuel adjusting needle
for wear or grooves.
•
Inspect the throttle and choke shaft and plate
assem blies for wear or excessive play.
REPAIR
Always use new gaskets when servicing and rein­
stalling carburetors . Repair kits are available which
include new gaskets and other components. These
kits are described below.
Components such as the throttle and choke shaft
assemblies, throttle plate , choke plate , idle fuel
needle, main jet, and others , are available sepa­
rately.
Refer to the appropriate Parts Manual to ensure
the correct carburetor repair kits. and replacement
parts are ordered .
REASSEMBLY
Throttle S haft Installation
especially the
1 .
2 .
3 .
4 . Operate the throttle lever; check for binding
Choke S haft Insta llation
1 .
I nstall the foam dust seal on throttle shaft . I n­
sert t he throttle lever/shaft assembly into car­
buretor body with the cutout portion of shaft
faCing the carburetor mounting flange .
I nstall the throttle plate t o throttle s haft . Make
sure the plate is positioned properly in bore as
marked and noted during disassembly (the
numbers stamped on plate should face the
carburetor mounting flange) . Apply Loctite®
#609 to threads of 2 plate retaining screws.
I nstall screws so they are slightly loose .
Apply finger pressure t o the throttle lever/shaft
to keep it firmly seated against pivot in carbu­
retor body. Rotate the throttle shaft until the
throttle plate fully closes the bore around its
entire perimeter; then tighten screws. Refer to
Figure 6-2 7 .
Apply Pressure When
Tightening Screws
Figure 6-27. Installing Throttle LeverlShaft.
between the throttle plate and carburetor bore .
Loosen screws and adjust throttle plate as
necessary; then torque screws to
I nstall the detent spring and ball into the car­
buretor body.
Throttle Lever /
Shaft Assembly
8/ 1 2 in. lb.
6 . 1 7
6