ETHANOL
MTBE
(ethyl
or
grain alcohol) 10% by volume
You
may
use
gasoline
containing
up
to
10%
ethanol by volume. Gasoline containing ethanol
may
be
marketed under the name "Gasohol".
(methyl
tertiary
butyl ether) 15% by volume
You
may
use
gasoline containing up
to
15% MTBE
by volume.
METHANOL (methyl
or
wood alcohol)
5%
by volume
You
may
use
gasoline
containing
up
to
5%
methanol
by
volume,
as
long
as
it
also contains
cosolvents and corrosion inhibitors
to
protect the
fuel system. Gasoline containing more than
5%
methanol by volume may cause
starting
and/or
performance problems.
It
may also damage metal,
rubber, and plastic parts
of
your fuel system.
If
you notice any undesirable operating symptoms,
try
another
service station,
or
switch
to
another brand
of
gasoline.
Fuel
system damage
or
performance problems resulting
from
the
use
of
an
oxygenated fuel containing more than
the
percentages
of
oxygenates mentioned above are
not
covered under warranty.
SOURCE
OF
EMISSIONS
The combustion process produces carbon monoxide, oxides
of
nitrogen, and hydrocarbons. Control
of
hydrocarbons and oxides
of
nitrogen
is
very
important
because, under certain conditions,
they
react
to
form
photochemical
smog
when
subjected
to
sunlight. Carbon monoxide does
not
react in
the
same way,
but
it
is
toxic.
This
utilizes
lean
carburetor
settings
and
other
systems
to
reduce
the
emissions
of
carbon monoxide, oxides
of
nitrogen and
hydrocarbons.
Tampering and Altering
Tampering
with
or
altering
the
emission
control
system may
increase emissions beyond
the
legal limit. Among those acts
that
constitute tampering are:
e Removal
or
alteration
of
any
part
of
the intake, fuel
or
exhaust
systems.
eAitering
or
defeating the governor linkage
or
speed-adjusting
mechanism
to
cause
the
engine
to
operate outside its design
parameters.
PROBLEMS
THAT
MAY
AFFECT
EMISSIONS
If
you are aware
of
any
of
the
following
symptoms, have
your
engine inspected
and
repaired by your servicing dealer.
21
I
Technical
&
Consumer
Information
e Hard starting
or
stalling after starting.
e
Rough
idle.
e Misfiring
or
backfiring under load.
e Afterburning (backfiring).
e Black exhaust smoke
or
high fuel consumption.
REPLACEMENT
PARTS
The emission control systems on your engine were designed, built.
We
recommend
the
use
of
genuine parts
whenever
you have
maintenance done. These original-design replacement parts are
manufactured
to
the
same
standards
as
the original parts,
so
you
can be confident
of
their
performance. The use
of
replacement
parts
that
are
not
of
the original design
and
quality may impair the
effectiveness
of
your emission control system.
A manufacturer
of
an
aftermarket part
assumes
the responsibility
that
the
part
will
not
adversely affect emission performance. The
manufacturer
or
rebuilder
of
the
part
must
certify
that
use
of
the
part
will
not
result in a failure
of
the
engine
to
comply
with
emission regulations.
MAINTENANCE
Follow the maintenance schedule. Remember
that
this schedule
is
based on
the
assumption
that
your
machine
will
be used
for
its designed purpose. Sustained high-load
or
high-temperature
operation,
or
use
in unusually
wet
or
dusty conditions, will require
more frequent service.
ENGINE
TUNE-UP
ITEM SPECIFICATION
Spark plug gap
0.028-0.031 in
(0.70 mm -0.80 mm)
Valve clearance
IN: 0.10 mm±0.02 mm (cold)
EX:
0.10 mm±0.02 mm (cold)
Other
No
other
adjustments needed
specifications
PUBLICATIONS
These
publications
will
give
you
additional
information
for
maintaining and repairing your engine.
You
may
order
them
from
your
engine dealer.
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