Austin-Healey Sprite User Manual

AUSTIN-HEALEY SPRITE GENERAL MAINTENANCE
The Fuel Pump
1. Retaining screw and
washer.
2. Cover.
3. Cork gasket.
4. Filter gauze.
5. Outlet union.
6. Inlet union.
7. Priming lever.
7
H30.4.C.
throttles are completely closed.
In order to adjust the carburetters successfully it is necessary
to remove the air cleaners and intake pipe assembly from the
carburetters and engine valve cover and make sure the pistons
work freely and the jets are properly centred.
Adjusting the Jets:
(1) Slacken oK the pinch-bolt of one of the spring coupling
clips locating the carburetter interconnecting shaft to
the carburetter throttle spindles and also release the two
screws securing the choke spring to the jet levers, so that
each carburetter can be operated independently.
(2) Release the throttle lever adjusting screws until both
(3) Turn the throttle lever adjusting screw for the rear car-
buretter clockwise until it i s just touching the web on
the carburetter body and then give it one full turn. This
will set the rear carburetter for fast idling and leave the
front one out of action. This can be ensured further by
' in.
lifting the front carburetter piston a m atter of —,
(13 mm.).
(4) With the engine running, set the jet adjusting screw for
the rear carburetter so that a mixture strength is obtained
which will give the best running speed for this throttle
opening, taking care to see that the jet head is kept in firm
contact with the adjusting nut the whole time.
(5) The correctness or otherwise of this setting can be checked
by raising the suction piston with a small screwdriver,
or similar instrument to the extent of
+, in. (.8 mm.).
This should cause a very slight momentary increase in the
engine speed without impairing the evenness of running
in any way.
Check pump to engine mounting setscrews and fuel pipe
unions for tightness.
Fuel pump service is available at all Austin dealers and A.C.
service stations. They are stocked with parts and fittings for any
repairs and adjustments that may become necessary.
Carburetters: The carburetters fitted to t he Austin-Healey
Sprite engine are two S.U. type H.l, and providing that the
regular attentions are carried out at the recommended mileage,
will be found to give efficient and trouble-free service.
The twin carburetters are carefully balanced to ensure perfect
running of the engine, and it is therefore important that only
qualified p'eople should be allowed to attend to any major faults.
Should the engine run erratically, having previously given good
results, look for a minor fault rather than a major one.
In the event of poor running, first make sure that the pistons
are able to move freely; if they are not, the cause may be due
to dirt in the suction chambers, the cure for which is given
u'nder 'Every 6,000 miles (9,600 km.)' (page 30).
The only carburetter adjustments are by means of the jet
adjusting screws and the throttle stop screws.
It is first essential to run the engine until it has attained its
normal running temperature before commencing any mixture
or slow-running adjustments.
The slow-running is governed by the setting of the jet adjusting
screws and the throttle lever adjusting screws, all of which must
be correctly set and synchronised if satisfactory results are to be
Carburetter Adj ustntent
1. & 3. Throttle lever
adjusting screws.
2. Throttle/mixture control
inter-connecting lever
adjuster.
obtained.
8461 .'
41

Austin-Healey Sprite Specifications

General

Brand	Austin-Healey
Model	Sprite
Category	Automobile
Language	English