Assembly And Installation; Jets; Fuel System - Datsun 1200 1971 Workshop Repair Manual

Fuel
SJstem
Check float needle and
seat
for
wear
Replace
the
assembly
If
worn
Check the throttle and choke bores
In
throttle
body
and
cover
castIng
for
wearor
out
of
round
Inspect
Idle
adjustIng
needles for
burrs
or
ndges Replace
as
reqUIred
Inspect gaskets to
ensure
that
they
do
not ap
pear
hard
or
bnttle and that the
edges
are
not
turned
or
dIstorted If
any
such condItIOn
IS
detected they
must
be replaced
Check filter
secreen screen
for
cloggIng Clean
and If
It
IS
dIstorted
or remaInS
plugged
replace
Check cluster
for loose
or worn
parts
If
damage
or
Ioosene
s
eXists replace
cluster
assembly
Check the
hnkage
for
operatIng
condItion
Inspect
the
operatIOn
of
acceleratIng
pump
Pour
gasohne Into
the float chamber
and
operate
the throttle hver
Check conditIOn of
gasohne
InjectIOn
from the acceleratIng
nozzle
Assembly
and Installation
Assemble
and Install the carburetor
In
I
everse sequence
of
dIsassembly
and removal
Replace
the
gaskets
If
necessary
When
dlsassembhng
and
reassembhng
the
In
terlock hnk and related components
be
careful not to bend
or
deform the
components
Reassembly carefully and correctly
so
that all
Interlock hnks
operate
smoothly
Jets
The carburetor performance depends
on
Jets
and
aIr
bleed and the vehicle
emISSIOns
largely depends
on
the carburetor
performan
ce
That
IS
why
these
components are
manufactured WIth
utmost
care
To clean them
use
gasohne
and blow
aIr on
them
ChangIng
Jet or air
bleed
sIze
may
cause
III vehICle
emIssIon
So
they
should
not
be
changed
theIr numbers
Trouble
Shootmg
In the
follOWIng
table the
symptom
and
causes
of carburetor troubles and remedIes for
them
are
hsted
to
faclhtate
qUIck
repaIrs
There
are vanous causes
of engIne trouble It
sometImes happens
that the
completely
effec
tlve
carburetor
seems
apparently
to
have
some
troubles when electnc
systern IS
defec
tIve
Therefore whenever the engIne has
troubles electnc
system
must
be checked first
before
adjusting
the carburetor
TROUBLE SHOOTING
Troubles POSSible
causes Remedlc
Overflow Dirt
accumulated
on
needle valve
Clean needle valve
Fuel
pump pressure
100 hIgh RCpJlf
pump
Needle valve
seat
Improper
Lap or
replai
e
ExceSSIve fuel Fuel overflows See above
I
l
onsumptlon
Each
mam aIr
bleed clogged Clean
80