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Kohler MAGNUM M18

Kohler MAGNUM M18
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SECTION
6A
FUEL
SYSTEMS
AND
GOVERNORS
C.
Increase
engine
RPM
to
the
high
speed
set-
ting
of
3600.
Apply
a
load
and
adjust
the
high
speed
mixture
screw
at
the
adapter
(see
Figure
6A-24),
as
follows:
Tum
high
speed
mixture
screw
OUT
toward
the
rich
side
until
engine
RPM
drops
(this
should
be
confirmed
with
tachometer).
Then
tum
screw
IN
toward
lead side
until
engine
RPM
recovers
and
begins
to
fall off.
At
this
point,
again
tum
the
screw
OUT
just
until
en-
gine
reaches
top
RPM
and
stop.
It
this
procedure
is
used
correctly,
tne
unit
will
now
be
adjusted
to
LEAN
BEST
POWER.
d.
When
using
a
dual
fuel
adapter
with
a
gaso-
line
carburetor,
the
gasoline
carburetor
mixture
setting
will
need
to
be
adjusted
from
that
of
the
factory.
LPG
CARBURETOR
Some
M18
&
M20
Engines
are
equipped
with
Kohler-
built
Liquid
Propane
Gas
(LPG)
carburetors
as
shown
in
Figure
6A-25.
On
applications
using
this
carbure-
tor,
the
equipment
manufacturer
furnishes
the
regula-
tors,
fuel
tank
and
other
LPG
system
components.
Use
the
part
number
stamped
on
the
body
of
the
car-
buretor
for
ordering
the
correct
replacement
compo-
nents
for
the
carburetor
involved
as
listed
in
the
M18
&
M20
parts
manual.
The
Venturi,
fuel
inlet
fitting,
adjusting
needles,
screws
and
springs
can
be
replaced
on
these
carburetors
however
the
throttle
shaft/lever
assembly
is
non-
serviceable.
If
the
shaft
or
bore
become
wom
or
dam-
aged,
the
carburetor
will
have
to
be
replaced.
If
starting
or
performance
problems
occur,
check
the
air
cleaner
first
and
service
LPG
system
components
following
instructions
provided
by
the
equipment
man-
ufacturer.
If
carburetor
readjustment
is
indicated,
stop
the
engine
and
reset
the
needle
adjusting
screws
to
the
initia!
settings
shown
in
Figure
6A-25
then
restart
the
engine,
allow
it
to
warm
up
and
make
final
adjust-
ments
on
regulators
and/or
carburetor
to
achieve
best
perfomance.
Idle
Speed
Throttle
Shaft
Assembly
Load
Screw
210
2-3/4
Turns
Open
Idle
Fuet
Adj.
Screw
1-3/4
to
2
Fitting,
Fuel
Inlet
Turns
Open
Figure
6A-25.
Kohler
LPG
Carburetor.
6A.19

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