A
large percentage of the
carburetters
returned to the Works for
correction have had the jet removed and replaced without being correctly
centred. On no account should the jet he tampered with.
It is quite an easy matter to bend the needle
if
the piston is
:~t
any tinie
removed, in which case
it
will hind on the jet and cause the piston to stick.
To ascertain
if
the needle is bent-providing the jet is not out of centre-
remove
it
from the piston, refit the suction chamber on to the hody of the
carhuretter and see
if
the piston falls freely. If the needle is bent the onls
satisfactory remedy is
to
replace
it
by
a
new one.
Coaver aacliin~
-
packing
washer
3Iding screw
Top half jet
bearing
Cork gland \vasher
Brass washer
Hottom hall jet
bearing
-,Cork washer
Cork gland was11t.r
Jet adjusting nut
Brass
washer
--
-g
Jet head.-
d
Float-Chamber Flooding.
This is usually obvious from the cluantity of
petrol flowing over the float-chamber and dripping from the air inlet.
lilooding is generally caused by foreign matter finding its way on to the
seating of the
flwt-chamber needle.
It
can usually he removed by raisir12
the float needle, permitting the incoming petrol strel~m to wash awa) the
particles of grit,
and
then twisting the needle on its seating
a
few times with
the fingers; the seating should on no account he ground in.
General.
It
hill
he re:~lised from the for'egoing that the
S.11.
carhuretter
is
;I
very simple instrument and easily managed when understood.
On the
other hand, considerable damage can h'e done
if
it
is not tr'eated correctly.
We would ,emphasise that the three troubles previously outlined ar,e the
only ones that can
he
C~LISC~
by d'efects in the carhuretter, and
if
these points
are in order the carburetter should on no account he dismantled or altered,
sinc,e the trouble must lie elsewh,ere.
D
/
1
PAGE
FIFTY-NINE
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