28
Fuel System
KohlerEngines.com
22 690 01 Rev. --
CARBURETOR
WARNING
Explosive Fuel can cause fi res and severe
burns.
Do not fi ll fuel tank while engine is hot or
running.
Gasoline is extremely fl ammable and its vapors can
explode if ignited. Store gasoline only in approved
containers, in well ventilated, unoccupied buildings,
away from sparks or fl ames. Spilled fuel could ignite
if it comes in contact with hot parts or sparks from
ignition. Never use gasoline as a cleaning agent.
Typical One-Barrel Carburetor Components
R
M
O
K
N
C
A
B
G
I
D
E
H
L
S
T
Q
P
J
F
A
Choke Lever and
Shaft Assembly
B
Choke Return Spring
C
Choke Plate
D
O-Ring
E
Main Jet
F
O-Ring
G
O-Ring
H
Carb Spacer
I
Fuel Inlet Needle
J
Fuel Bowl
K
Gasket
L
Shut-off Solenoid
Assembly
M
Fuel Bowl Screw
N
Float Pin
O
Float
P
Idle Speed Screw
and Spring
Q
Throttle Plate Screw
R
Throttle Plate
S
Filter
T
Throttle Lever and
Shaft Assembly
These engines are equipped with a fi xed main jet
carburetor. Carburetors will have a low idle speed
adjustment screw.
Troubleshooting Checklist
When engine starts hard, runs rough, or stalls at low
idle speed, check these areas before adjusting or
disassembling carburetor.
1. Make sure fuel tank is fi lled with clean, fresh
gasoline.
2. Make sure fuel tank cap vent is not blocked and is
operating properly.
3. Make sure fuel is reaching carburetor. This includes
checking fuel shut-off valve, fuel tank fi lter screen,
in-line fuel fi lter, fuel lines and fuel pump for
restrictions or faulty components as necessary.
4. Make sure blower housing and carburetor are
securely fastened to engine using gaskets in good
condition.
5. Make sure air cleaner element (including precleaner
if equipped) is clean and all air cleaner components
are fastened securely.
6. Make sure ignition system, governor system,
exhaust system, and throttle and choke controls are
operating properly.
