Tillotson
diaphragm
ca
rbur
etlo
r
Fiq
.48
I
Ho.e
nipple
2 Fuel pump
body
3 Fuel pump
diap
hragm
3 A
In
let
"alve
on
pu
mp
di
aphragm
3 B Outl
et
valve on p
um
p
diaphragm
4 Fuel pump
ga.ke
t
5 Di
aphragm
hous
in
g gasket
(;
Control <flomber
7
Ad
iu.ting sCrew
lo
r idling j
et
8 Impulse
passage
9
Id
ling iet
orilice
30
lOA Idlin g outlet
pO$Soge
10
B By_pass p
o"ag
e
11
Bunerily valve
12
Main iet orif
ic
e
13
Corbu rettor housing
14
Throato
l
corb
urenor
Ive
ntur
i)
15 Main luel o
ull
et
16
Choke
17
fuel
passage
from
pu
mp
to control chamber
18
Inl
et needle and
.eat
1
8ACopper
seal
19 Adiusting screw lor main iet
"
..
..
,"
20
In
let compre
..
i
on
sp
ring
21
Inl
et conlrol lever
22 Pivot pin
Z3
Venl hole
24
Di
ap
hragm hous
in
g
25
Diaphragm
26
Air <flamber
V Filter
go.k.,
28
Fu
el
stmine,
'l'I Filter housing sere
'"
3(} Fuel chamt.er
31
Pu
ls
ation
chamber
32
Fuel
fil
ter housing
Initial adjustm
en
t
Jet
adjuslmenl should first
be
done
when the
engine
is
cold. Proceed
as
follows: Close
both jets
and
open
the adjusting screw
of
the main jel
and
the
ad
ius ling screw
of
the
idling jet
again
10
the values given
in
the
carburettor
chart (see technical
data).
Turn
Ihe idling odiustment screw so for
bock:
that
it
is
no longer
in
conlact
with the butterfly
valve lever; then
tu
rn the scr
ew
in
again
about
one
whale turn, so that
th
e butterfly
valve
is
slight
ly
open.
N
ow
stortthe
engine
and
allow it to warm up (open Ihe choke
as
soon
as
the
engine
starts up).
Final adjustment: see section
-Test-running the engine"
Maintenance
of the
carburellor
At
ceria
in
intervals every
carburetlor
must
be
disassembled,
cleaned
and
overhauled.
All
exterior dirt should
be
cleaned
off with
gasoline
before
disassembly. The holes,
ducts,
passages
and
jets must not be
cleaned
with
hard
objects
(e
. g. wire
or
drill),
but should only
be
rinsed with
gasoline
and
cleaned
with compressed
air
(remove
diaphragms
before
blowing through). Before assembly, check
that
all
carburetto
r
components
(especially jet
se
ats
and
diaphragms)
are
in
proper
working
order.
Checking
and
cleaning the fuel filter
in
good
time helps to achi
eve
satisfactory func·
tioning of the
carburellor
and
longer engine service life.
Special maintencmce instructions
1.
If
pump failure occurs, always check (before removing the pump
diaphragm)
the
impulse pipeline for
leakage
and
blockage.
2.
When
filling the inlet control lever
and
the compression spring (see illustration),
take
care
thai both
ends
of
Ihe spring
are
bedded
in
the spring seats.
3.
Th
e compression spring musl not be stretched,
as
the spring pressure
is
accurately
adjusted
to Ihe carbureltor.
4.
The inlel control lever
is
cor-
rectly inserted when
it
is
atthe
same
level
as
the bottom
of
the di
aphra!m
chamber
(see
arrows
on
il
uslration).
5.
Th
e inlet needle should close
just when the inlet control le-
ver
is
flush with the boltom
of
the enamber.
If
not, Ihe lever
should
be adjusted by bend-
in
g
it
a liltle (an the
in
let
needle side).
6.
When
assembling Ihe carbu-
retlor, make sure
that
main
diaphragm
,
gasket
and
cast-
ing
of
the housing
are
care-
fu
l
ly
inserted into the cast-on
centering pins;
similarly, the
gasket,
fuel
diaphragm
and
fuel pump body
are
adjusted
by
means
of
the
same
kind
of
centering pins.
The gaskets
at
both
dia·
phragms
are
in
eaen
case
po·
sitioned
on
that side
of
the
diaphragm
which faces the
carburellor
housing.
,"'
"
..
"
Fig.
49
31
To Next Page
Loading...
Need help?
General
