Kohler HD Series Service Manual page 23

CARBURETOR
Explosive Fuel can cause fi res and severe
burns.
Do not fi ll fuel tank while engine is hot or
running.
Typical One-Barrel Carburetor Components
C
D
E
J
Low Idle Speed
A
Adjusting Screw
C Fuel Shut-Off Gasket
Fuel Shut-Off Valve
E
(if equipped)
G Main Jet
I Fuel Inlet Needle
K Hinge Pin
14 690 10 Rev. --
WARNING
A
B
F
G
H
I
K
L
M
N
O
B Idle Jet
D Wave Washer
F Main Nozzle Tube
H Bowl Gasket
J Spring
L Float
KohlerEngines.com
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.
M Fuel Bowl
O Bowl Retaining Screw
These engines are equipped with a fi xed main jet
carburetor. Carburetor is designed to deliver correct fuel-
to-air mixture to engine under all operating conditions.
Idle mixture is set at factory and cannot be adjusted.
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 air cleaner base 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.
Fuel System
Bowl Retaining Screw
N
Gasket
23