Not
e:
For Fairbanks recoil starter, place starter hub wi
th
washer
and
retaining plate
in
position, hold
it
with strop s
panner
a
nd
secure
it
with nut M
14
x
1.5.
Torque 5.4 ... 6.0 kpm
(39.1
...
<13.<1
ft. lb.).
For reco
il
starier with friction jaw
s,
place
starter
hub ond washer
in
position, hold il
with pin
spanner
(repair tool no.
7)
and
secure
it
with collar nut M 14 x 1.5.
To
r
que
5.4
...
6.0
kpm
(39.
1 .. .43.4
ft.
lb.).
Secure reco
il
star
ler with 6 nuts M 6
and
spring washers.
El
ect
ri
c s
tart
e
r,
C(lrbure
Hor
and
intake
si
lencer
Sc
rew on electric starter.
Screw on inertia-pinion type starter with 2 nuts M 8
and
spri
ng
washers.
Screw on solenoid-controlled storler with 2 nuts M 8
and
spring washers. Screw
additiona
l supporting
plate
on to crankcase
p.
t.
o. side with two hexagon head
scre
ws
M 8 x
20
and
washers.
Connect impulse pipe
(<I,
Fig.
1)
to connection on crankcase.
Place on both insulating bushes, insulating flange, carburettar
(fi
t impulse pipe
10
connection on carburettar)
and
both fibre washers (hard cloth side towards carbu·
rettor)
and
screw carburettor firmly
in
to place with 2 self-locking nuts M
6.
Note:
On
SACHS
SA
280
A there
is
on int
ake
stack between corburetlor
and
cy
linder.
Se~ure
cover plate
(2,
Fig.
I)
and
adapter
flange with 3 cyli ndrical screws
'/."
x
15
and
spring washers to carburettor
and
secure intake silencer (I,
Fig
.
1).
On
engines
wi
th intake silencer
(F
i
g.
302,
page
53),
secure cover
plate
ond intake
manifold with 2
cy
lindrical screws
".'
x
55
and
1 cylindrical 'I,' x
30
and
spri
ng
washers to carburettor. Secure intake silencer with 2 hexagon screws M 6 x
15
ond
spring washers to fan housing.
Exhaust muffler
Screw on exhaust muffler
or
manifold
and
bradeet respectively.
40
TEST-RUNNING AND RUNNING-IN
THE
ENGINE
T esl'running
Start the
engine
and
let
it
worm up (open the choke
as
soon
0$
the engine storts up).
Fin
ol adjustment
Ad
ju
st the desired idling
speed
of the engine by means of the idling adjustment
sc
rew.
Then
slowly vary the selling of the adjusting
~crew
of Ihe idling
jet.so
.thal the engine
speed
incr
eases
smoothly when the throttle IS opened. The
mOIn
tet IS correctly
ad-
justed when the engine gives satisfactory two-stroke
operotion
under
load
and
only
slight
fum
es
ore
discharged from Ihe exhaust (Hl
242
A with fixed main jel).
If
there
is
excessive exhoust smoke under l
oad,
turn main iet adjusting screw clockwise
(closing) until smoking stops
and
eng
in
e runs satisfactorily.
If the idling
speed
fluctuates too
much
or
is
too high, turn the idling jet adjusting screw
anti-clockwise (to
open
Ihe jet) unlil the engine runs smoothly
01
lo
wer
speed
withoul
beginning to discharge more smoke from the exhaust.
Running-in period
Even
the fine
ly
machined surfaces of pistons
and
cylinders
are
not so smooth os the
surfaces of paris which have
been
sliding
against
one
ano
ther for some time.
For
this reason every piston requires to be run
in
during Ihe initial period of operation.
This
does
not call for any
specia
l precautions, however, but simply means
that
th
e
eng
in
e should not be required to give
its
maximum output during the firsl
20
...
30
ru
nning hours.
No special gasolineloil mixture
is
required during the running-in period,
and
conse-
quently there
is
no
need to
add
any
special oils.
41
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