PERIODICAL
SERVICING
extra fuel filter
with water separator is fitted
(Fig.
15), the
transparent container
should
be
checked for
any water in
the
fuel.
The
water can
be removed
through
the
Qrain
cock in the
bottom of the filter
container.
Look out for fuel
splash. The filter
element
should
be
changed
at
least
once each
season.
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Itlkail
\
Fis.
15.
Cleaning fuel f
ilter
Extra
fuel filter
with
water separa-
tor
10.
Checking electrolyte level
in battery
Check
the
battery
electrolyte level
at
least
every 14
days.
The level
should
be
between 5 and 10 mm
(1
14
and 112"1 over
the
cell
plates.
Add
distilled water
whenever
necessary.
Never add
too
much
since the electrolyte
can then
splash out
and cause corrosion
damage. Never check the electrolyte
level
by
using
a
lighted
match
since
gas
formed
in
the battery cells is
highly
explosive.
11.
Checking
and
changing
the spark
plugs
Check the
spark
plug
gap
and
wear at least
after every
50 hours
of operation. The
electrode
gap
should
be 0.7
mm
(0.028")
and this must
be checked
by using
a
wire
type
gauge.
lf
the
electrodes are
burnt
or
the insulation
damaged, the
plugs
must be
replaced
immediately. lf
necessary,
clean the
plugs
with
a
wire
brush. Make
sure
that
you
always
get
the right
type of
spark
plugs
with the
correct heat range
and
also that
the
plugs
are tightened
to the correct
torque.
(See
Technical
Data.)
to
SERVICING
GENERAL SERVICING
INSTRUCTIONS
12.
Check-tightening
cylinder
head bolts
With a new
engine or when
the cylinder
head has
been removed, the
cylinder head
bolts
should be
re-tightened after
20 hours
running.
Check-tightening
of the bolts
should
also be
carried out
once
each
season
and always
with
a
torque
wrench.
Concerning
tightening
torque, see
"Technical
Data".
Fig.
16.
Tightening
sequence
for
cylinder head bolts
13.
lgnition
timing
and distributor
All
adjusting
work
on the engine ignition system
should be
carried out by a service
workshop with
the
special
equipment
required
for
this
purpose.
The ignition system
is one
of the most sensitive
parts
of
the engine and interference
here immediately
leads
to decreased
engine
output, high fuel consumption
and, in the
worst cases,
serious
engine damage.
The ignition
timing and the distributor
should be checked
once
each
season.
IGNITION TIMING
The ignition
timing
is checked
only with the help of a stroboscope
at the speeds
specified
in
the Technical
Data On
the oil
pump
housing there
is a notch and on
the
flywheel
timing marks,
see
Fig.
'1
7.
@
o
o@
11
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