High Speed (RPM) Adjustment
1. With engine running, move throttle control to fast.
2. Turn inner adjustment screw outward to decrease, or
inward to increase RPM speed. Courage singles
require loosening screws on speed control bracket
and sliding towards carburetor to lower and away
from carburetor to increase speed.
Carburetor Servicing
WARNING
Accidental Starts can cause severe injury or
death.
Disconnect and ground spark plug lead(s)
before servicing.
Before working on engine or equipment, disable
engine as follows: 1) Disconnect spark plug lead(s). 2)
Disconnect negative (–) battery cable from battery.
NOTE: Main and slow jets are fi xed and size specifi c
and can be removed if required. Fixed jets for
high altitudes are available.
● Inspect carburetor body for cracks, holes, and other
wear or damage.
● Inspect fl oat for cracks, holes, and missing or
damaged fl oat tabs. Check fl oat hinge and shaft for
wear or damage.
● Inspect fuel inlet needle and seat for wear or damage.
● Inspect spring loaded choke plate to make sure it
moves freely on shaft.
Float Replacement/Overhaul/Choke Repair
NOTE: Inlet needle center pin is spring loaded. Make
sure fl oat rests against fuel inlet needle without
depressing center pin.
If symptoms described in Troubleshooting-Carburetor
Related Causes indicate fl oat level problems, remove
carburetor from engine to check and/or replace fl oat.
Use a fl oat kit to replace fl oat, pin, fl oat valve, clip, and
screw.
1. Perform removal procedures for appropriate air
cleaner and carburetor outlined in Disassembly.
2. Clean exterior surfaces of dirt or foreign material
before disassembling carburetor. Remove bowl
retaining screws, or solenoid assembly on most
single cylinder engines, and carefully separate fuel
bowl from carburetor. Do not damage fuel bowl
O-rings. Transfer any remaining fuel into an
approved container. Save all parts. Fuel can also be
drained prior to bowl removal by loosening/removing
bowl drain screw.
3. For two-barrel carburetor, remove fl oat pin screw,
fl oat, pin, and inlet needle. Seat for inlet needle is
not serviceable and should not be removed.
For one-barrel carburetor, remove fl oat pin, fl oat,
and inlet needle. Seat for inlet needle is not
serviceable and should not be removed.
4. Clean carburetor bowl and inlet seat areas as
required. To reassemble fuel bowl go to step 18,
otherwise go to step 5.
5. Carefully remove main jet(s) from carburetor. For
two-barrel carburetors, note and mark jets by
location for proper reassembly. Main jet(s) may be
size/side specifi c. After main jets are removed, on
some carburetors, main nozzles can be removed
through bottom of main towers. Note orientation/
direction of nozzles.
For two-barrel carburetor, end with 2 raised
shoulders should be out/down adjacent to main jets.
Save parts for cleaning and reuse.
6. Position of slow jet varies and is removable only on
some styles of carburetors. See correct illustration
for corresponding style of carburetor showing
location. (On two-barrel carburetors, slow jets may
be sized to specifi c side. Mark or tag jets for proper
reassembly. Note small O-ring on bottom of each
jet.) Save parts for cleaning and reuse unless a jet
kit is also being installed. Clean slow jets using
compressed air. Do not use wire or carburetor
cleaner.
7. Remove idle speed (RPM) adjustment screw and
spring from carburetor. Discard parts.
Carburetor is now disassembled for appropriate
cleaning and installation of parts in overhaul kit.
Further disassembly is not necessary. Throttle shaft
assembly, fuel inlet seat, idle fuel adjustment screws
with limiter, and carburetor body, are non-serviceable
items and should not be removed. Choke shaft
assembly is serviceable, however it should not be
removed unless a choke repair kit will be installed.
To install choke repair kit go to step 8, otherwise go
to step 18.
8. Remove and discard plastic cap from end of choke
lever/shaft assembly.
9. Note position of spring legs and choke plate for
correct reassembly later. Remove screws attaching
choke plate to choke shaft. Pull shaft out of
carburetor body and discard removed parts.
10. Use a screw extractor (easy-out) and remove
original choke shaft bushing with old choke lever
from carburetor housing. Save bushing to use as a
driver for installing new bushing. Discard old lever.
11. Clean I.D. of both choke shaft bores as required.
Fuel System
2924 690 06 Rev. O KohlerEngines.com
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