Kohler K91 Service Manual page 31

Clea ning
WARNING: Flammable Solvents!
Carbure tor cleaners and solvents are
extremely fla mmable. Keep sparks ,
flames and other sources of ignition
a way from the area . Foffow the
cleaner manufacturer's warnings and
instructions on its proper and safe
use . Ne ver use gasoline as a clean­
ing agent.
All parts should be carefully cleaned using a car­
buretor cleaner (such as acetone) . Be sure a l l
g u m deposits a re removed from t h e following ar­
eas :
Carburetor body and bore; especially the areas
where throttle plat e , choke plate and s hafts are
seated .
Float and float hinge.
Fuel bowl.
Idle fuel and " off-idle" p orts in carburetor bore,
ports in main fuel adjusting needle and main
f uel seat.
NOTE : These areas can be cleaned using a p i ece
of fine wire in addition to cleaners . Be careful not
to enlarge the ports or break the cleaning w i re
withi n the port s .
Blow out a l l passages with compressed a i r .
NOTE: D o not s ubmerge carburetor i n cleaner o r
solvent when fiber or rubber seals are installed .
The cleaner may damage these seal s .
I n s pect ion
1 .
Carefully i n spect all components and replace
those that are worn or damaged .
2. I nspect the carburetor body for cracks . holes
and other wea r or damage .
3 . Inspect t h e float for dents o r holes . Check the
float hinge for wear and mi ssing or damaged
float tabs .
4 .
Ins pect the i n let needle and seat for wear or
g rooves .
5 . I nspect t h e tips o f the main and idle fuel ad­
justing needles for wear or grooves .
Inspect t h e throttle and choke shafts and plate
assemblies for wear or excessive play.
Idle Speed
Screw
1 � /
\
�
pri n g
I dle Fuel
Needle
i�;L?-
Fuel
I nlet
Seat
Fuel I n let
Needle
FI
Fuel
Bowl
Retaining
Screw
Figure 6-7. Kohler-Built Adjustable Jet
Carburetor - Exploded View.
Choke Plate Modification
The choke action has been changed on production
carburetors to reduce the chances of over chok­
ing . On production carbu retors now used on the
K321 and K34 1 , both relief holes i n the choke
plate have been enlarged to 1 1 /32" while on the
K24 1 and K3Q1 . one relief hole i s now 1 1 /32" and
the other i s 3 / 1 6 " . If you find that the relief holes
are smaller than t h i s . enlarge them to these d i ­
mensions .
NOTE: When redrilling the holes , take the neces­
sary precautions to p revent chips from entering
the engi n e .
Repair
Always use new gaskets when servicing and rein­
stalling carburetors . Several repair kit s , which in­
clude the gaskets and other components
Needle
V
/
spring
i
i
Carburetor
Body
Bowl
G asket
Float
Hi nge
Float Pin
. .
ow e ammg
B
I R t
Screw G asket
are
I
6 . 5
6