Advertisement
M18 & M20
SECTION 6B
FUEL SYSTEMS
CARBURETOR SERVICE
(WALBRO-BUILT)
Two types of Walbro carburetors are used on the
Magnum M18 & M20 engines. One is the fixed main
Jet type while the other features an adjustable main or
high speed needle. These are built to Kohler Co.
specifications by Walbro Corp.
This section covers the adjustment, disassembly,
Cleaning, inspection, repair and reassembly of both
types of these Walbro-built side draft carburetors with
differences called out wherever pertinent. Most com-
ponents are identical.
Idle Speed
Adjusting Screw
Figure 6B-1.
Walbro Carburetor.
A
WARNING:
Accidental Starts!
Before servicing the carburetor, engine, or equip-
ment, always remove the spark plug leads to prevent
the engine from starting accidentally. Ground the
leads to prevent sparks that could cause fires.
A
WARNING:
Explosive Fuell
Gasoline may be present in the carburetor and fuel
system. Gasoline is extremely flammable and its
vapors can explode if ignited. Keep sparks, open
flame, and other sources of ignition away from the
area to prevent the possibility of fires or explosions.
A
WARNING:
Prevent Eye Injury!
Suitable eye protection (safety glasses, goggles, or
face shield) should be worn for any procedure in-
volving the use of compressed air, punches, ham-
mers, chisels, drills, or grinding tools.
6B.1
Advertisement
