Carburetters - single hs4 (not capstat) 1964-77

Carburetter Assemblies
The single HS4 (1 1/2" diameter) carburetter installation was first fitted to automatic gearbox Minis in 1964. The 1275 GT had a single HS4 from its launch in 1969, but the other manual gearbox Minis only received the HS4 carburetter in 1974. From that year up until 1992, all Minis except the 1990-91 Cooper had a single HS4 installation.
The carburetters listed here fall into two distinct types: those with fixed metering needles (earlier versions) and those with 'swing' or biased needles which became prevalent during the early 1970s as emissions regulations took force.
This section details HS4 carburetters with conventional, non-temperature compensating jets, fitted between 1964 and 1977. The later design of HS4 with temperature compensating 'Capstat' (also known as Waxstat) jets, fitted between 1975 and 1992, can be found in the next section. Identification of your HS4 is absolutely necessary before ordering parts. It should be a simple matter of looking at the aluminium tag attached to one of the float chamber lid screws; the number stamped on the tag should correspond to one of the carburetter part numbers listed here. Failing that, if the tag is missing, a study of the applications below will help.
Reconditioned and in some instances new carburetters are available; please contact us for details.

848cc Carburetter Assemblies
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
1	AUD170	CARBURETTER ASS'Y, HS4, fixed needle type	1	1964-67; Mk I, automatic.
	AUD250	CARBURETTER ASS'Y, HS4, fixed needle type	1	1967-69; Mk II, automatic.
	AUD360	CARBURETTER ASS'Y, HS4, fixed needle type	1	1969; Mk III, automatic.
	AUD394	CARBURETTER ASS'Y, HS4, fixed needle type	1	1969-74; Mk III, automatic.
	AUD611	CARBURETTER ASS'Y, HS4, biased needle type	1	1974; Mk III, manual and automatic.
	FZX1064	CARBURETTER ASS'Y, HS4, biased needle type	1	1975; Mk III, manual and automatic, Europe (not UK).
	AUD713	CARBURETTER ASS'Y, HS4, biased needle type	1	1974; Van (optional fitment).

998cc Carburetter Assemblies
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
	AUD184	CARBURETTER ASS'Y, HS4, fixed needle type	1	1967-69; Mk II, automatic (also Riley and Wolseley, 1967-69).
	AUD366	CARBURETTER ASS'Y, HS4, fixed needle type	1	1969; Mk III, automatic.
	AUD367	CARBURETTER ASS'Y, HS4, fixed needle type	1	1969; Mk III, automatic.
	AUD393	CARBURETTER ASS'Y, HS4, fixed needle type	1	1969-74; Mk III and Clubman, automatic.
	AUD450	CARBURETTER ASS'Y, HS4, biased needle type	1	1972-74; Mk III and Clubman, automatic.
	AUD679	CARBURETTER ASS'Y, HS4, biased needle type	1	1974; Mk III and Clubman, manual and automatic.
	AUD679	CARBURETTER ASS'Y, HS4, biased needle type	1	1975; Mk III and Clubman, manual and automatic, not Europe.
	FZX1065	CARBURETTER ASS'Y, HS4, biased needle type	1	1975; Mk III and Clubman, manual and automatic, Europe (incl. UK).
	AUD706	CARBURETTER ASS'Y, HS4, biased needle type	1	1974; Van (optional fitment).

998cc Carburetter Assemblies, Canada and Sweden
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
	AUD548	CARBURETTER ASS'Y, HS4, biased needle type	1	1972-73; Canada.
	AUD618	CARBURETTER ASS'Y, HS4, biased needle type	1	1973; Canada.
	AUD654	CARBURETTER ASS'Y, HS4, biased needle type	1	1974; Canada.
	FZX1016	CARBURETTER ASS'Y, HS4, biased needle type	1	1975-76; Canada.
	FZX1114	CARBURETTER ASS'Y, HS4, biased needle type	1	1976-77; Canada.
	FZX1094	CARBURETTER ASS'Y, HS4, biased needle type	1	1975-76; Sweden.
	FZX1115	CARBURETTER ASS'Y, HS4, biased needle type	1	1976-77; Sweden.

1098cc Carburetter Assemblies
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
	AUD608	CARBURETTER ASS'Y, HS4, biased needle type	1	1973-74; Europe (not UK).
	FZX1066	CARBURETTER ASS'Y, HS4, biased needle type	1	1975-76; Europe (not UK).

1275cc Carburetter Assemblies
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
	AUD317	CARBURETTER ASS'Y, HS4, fixed needle type	1	1969-71; 1275 GT.
	AUD453	CARBURETTER ASS'Y, HS4, biased needle type	1	1971-72; 1275 GT.
	AUD567	CARBURETTER ASS'Y, HS4, biased needle type	1	1972-74; 1275 GT.

New Replacement Carburetter Assemblies
For some original carburetter types, two new replacement carburetter assemblies have been made available:
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
	FZX3003	CARBURETTER ASS'Y, HS4, replacement type	1	Replaces FZX1066 carburetter.
	FZX3012	CARBURETTER ASS'Y, HS4, replacement type	1	Replaces AUD679, FXZ1016, FZX1064, FZX1065, FZX1094,
				FZX1114 and FZX1115 carburetters.

Gasket, Service, Rebuild and Sundries Kits
A gasket kit includes manifold gasket, air filter gasket, suction chamber damper washer, float lid gasket and jet union washer and seal.
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
2	AUE811	GASKET KIT, HS4 carburetter	1

A service kit includes the gasket kit, plus float chamber needle and seat, jet assembly and clips for the jet pick up link.
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
3	CSK52	SERVICE KIT, HS4 carburetter	1

A rebuild kit includes the service kit, plus throttle spindle, throttle spindle bushes, throttle disc and throttle disc screws.
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
4	CRK251	REBUILD KIT, HS4 carburetter	1	For AUD170, AUD250, AUD393, and AUD453 carburetters.
	CRK219	REBUILD KIT, HS4 carburetter	1	For AUD184, AUD317, AUD360, AUD366, AUD367, AUD394, AUD450, AUD567, AUD608, AUD611, AUD679, AUD706, AUD713, FZX1064 and FZX1065 carburetters.
	CRK227	REBUILD KIT, HS4 carburetter	1	For AUD548, AUD618, AUD654, FZX1016, FZX1066, FZX1094, FZX1114 and FZX1115 carburetters.

A sundries kit includes choke cam pivot bolt and tubes, suction chamber screws, float lid screws and washers, stop screws and springs, jet nut, jet spring and washer, spindle lock tab and float pivot pin.

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
5	CSK003	SUNDRIES KIT, HS type carburetter	1

Components
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
6	AUD9186	SUCTION CHAMBER ASSEMBLY	1	For AUD170 and AUD250 fixed needle carburetters.
	AUD9635	SUCTION CHAMBER ASSEMBLY	1	For AUD184, AUD317, AUD360, AUD366, AUD367, AUD393 and AUD394 fixed needle carburetters.
	AUD9988	SUCTION CHAMBER ASSEMBLY	1	For biased needle carburetters.
7	AUC2057	SCREW, locking needle	1	Included in fixed needle suction chamber assemblies.
	AUD4251	SCREW, locking needle	1	Included in biased needle suction chamber assembly.
8	JZX1394	SCREW, chamber to body	3
9	AUC8103	DAMPER, suction chamber	1	Except AUD611, AUD713 and FZX1064 carburetters.
	CUD4103	DAMPER, suction chamber	1	For AUD611, AUD713 and FZX1064 carburetters.
10	AUC4900	WASHER, fibre, damper	1
11	AUC4387	SPRING, piston, red	1
12	WZX1120	PISTON GUIDE KEY KIT	1
13	AUC2054	KEY, piston guide	1	Included in piston guide key kit.
14	AUC2099	SCREW, piston guide key	1	Included in piston guide key kit.
15	AUC1249	PIN, piston lift	1
16	AUC1151	SPRING, piston lift pin	1
17	AUD4150	CIRCLIP, piston lift pin	1
18	AUD1034	NEEDLE, jet, fixed, standard (AC)	1	For AUD184, AUD366, AUD367 and AUD393 carburetters.
	AUD1230	NEEDLE, jet, fixed, weak (HA)	1	For AUD184 carburetters.
	AUD1267	NEEDLE, jet, fixed, rich (M1)	1	For AUD184 carburetters.
	AUD1478	NEEDLE, jet, fixed, standard (AN)	1	For AUD170, AUD250, AUD360 and AUD394 carburetters.
	AUD1149	NEEDLE, jet, fixed, weak (EB)	1	For AUD170 and AUD250 carburetters.
	AUD1242	NEEDLE, jet, fixed, rich (H6)	1	For AUD170 and AUD250 carburetters.
	AUD1528	NEEDLE, jet, fixed, standard (DZ)	1	For AUD317 carburetters.
19	CUD1002	NEEDLE, jet, biased (AAC)	1	For AUD679 (1975) carburetters.
	CUD1006	NEEDLE, jet, biased (AAG)	1	For AUD450 and AUD548 carburetters.
	CUD1015	NEEDLE, jet, biased (AAR)	1	For AUD453 carburetters.
	CUD1025	NEEDLE, jet, biased (ABB)	1	For AUD567 carburetters.
	CUD1032	NEEDLE, jet, biased (ABJ)	1	For AUD618, AUD654 and FZX1016 carburetters.
	CUD1037	NEEDLE, jet, biased (ABP)	1	For AUD608 and FZX1066 carburetters.
	CUD1040	NEEDLE, jet, biased (ABS)	1	For AUD611 and AUD713 carburetters.
	CUD1045	NEEDLE, jet, biased (ABX)	1	For AUD679 (1974), AUD706, FZX1094 and FZX1115 carburetters.
	NZX4004	NEEDLE, jet, biased (ADD)	1	For FZX1114 carburetters.
	NZX4005	NEEDLE, jet, biased (ADE)	1	For FZX1065 carburetters.
	NZX4008	NEEDLE, jet, biased (ADH)	1	For FZX1064 carburetters.
20	WZX1276	NEEDLE GUIDE KIT	1	For biased needle carburetters.
21	JZX1039	GUIDE, needle	1	Included in needle guide kit.
22	AUD3306	SPRING, needle	1	Included in needle guide kit.
23	AUD9451	JET ASSEMBLY	1	Red coloured jet body with black identification sleeve.
24	AUD2129	NUT, jet union	1	Included in jet assembly.
25	AUD2193	WASHER, jet union	1	Included in jet assembly.
26	AUD2194	SEAL, jet union	1	Included in jet assembly.
27	WZX1341	JET BEARING KIT	1	For fixed needle carburetters.
	WZX1340	JET BEARING KIT	1	For AUD450, AUD453, AUD548, AUD567, AUD608, AUD611, AUD679, AUD706, AUD713, FZX1064, FZX1065 and FZX1066 biased needle carburetters.
	WZX1442	JET BEARING KIT	1	For FZX1114 and FZX1115 biased needle carburetters.
Note that there is no jet bearing kit for AUD618, AUD654, FZX1016 or FZX1094 biased needle carburetters; please order components separately.

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
28	AUC8460	BEARING, jet	1	Included in WZX1341 jet bearing kit.
	AUD3414	BEARING, jet	1	Included in WZX1340 jet bearing kit.
	JZX1182	BEARING, jet	1	Included in WZX1442 jet bearing kit.
	AUD3410	BEARING, jet	1	For AUD618, AUD654, FZX1016and FZX1094 biased needle carburetters.
29	AUC2002	NUT, jet locking	1	For all carburetters; included in jet bearing kits.
30	AUC2114	SPRING, jet locking	1	For all carburetters; included in jet bearing kits.
31	AUC8461	NUT, jet adjusting	1	Included in WZX1341 and WZX1340 jet bearing kits. Also for AUD618, AUD654, FZX1016and FZX1094 biased needle carburetters.
	JZX1183	NUT, jet adjusting	1	Included in WZX1442 jet bearing kit.
32	AUC1310	FLOAT CHAMBER, RH mounting	1
33	AUD2071	ADAPTOR, float chamber mounting	1	Natural coloured die cast metal.
34	BH504161	BOLT, float chamber attachment	1
35	LWZ304	WASHER, locking	1
36	PWZ104	WASHER, plain	1
37	AUE266	FLOAT CHAMBER LID ASS'Y	1	Includes float, needle and seat and float lid gasket.
38	WZX1300	FLOAT KIT	1	Includes float lid gasket.
39	AUC1152	PIN, float hinge	1
40	WZX1100	NEEDLE AND SEAT ASS'Y, float chamber	1	Includes float lid gasket.
41	AUC8459	GASKET, float lid	1
42	AUC1215	PLATE, baffle	1
43	WZX1287	FLOAT LID SCREW KIT	1
44	JZX1394	SCREW, float lid attachment	3	Included in float lid screw kit.
45	AUC2246	WASHER, locking	3	Included in float lid screw kit.
46	AUC1038	TAG, carburetter identification	1
AUC1038 is a blank tag; when ordering, please state the carburetter assembly number you require stamped on the tag.

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
47	WZX1177	THROTTLE SPINDLE KIT	1	Includes lock tab, disc screws, manifold and air filter gaskets.
48	AUD3080	BUSH, throttle spindle	2
Note that the throttle spindle bosses on the carburetter body must be reamed to 9.5mm diameter before fitting bushes.

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
49	WZX1323	THROTTLE DISC KIT	1	For AUD170, AUD250, AUD393, and AUD453 carburetters.
	WZX1324	THROTTLE DISC KIT	1	For AUD184, AUD317, AUD360, AUD366, AUD367, AUD394, AUD450, AUD567, AUD608, AUD611, AUD679, AUD706, AUD713, FZX1064 and FZX1065 carburetters.
	WZX1325	THROTTLE DISC KIT	1	For AUD548, AUD618, AUD654, FZX1094, FZX1016, FZX1066, FZX1114 and FZX1115 carburetters.

A throttle disc kit includes throttle disc, throttle disc screws, manifold and air filter gaskets.

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
50	AUC1358	SCREW, throttle disc to spindle	2
51	AUD2787	LEVER, throttle return	1	For all carburetters except FZX1066.
	JZX1055	LEVER, throttle return	1	For FZX1066 carburetters.
52	WZX981	THROTTLE STOP SCREW KIT	1
53	AUC8483	SCREW, throttle return lever stop	1	Included in throttle stop screw kit.
54	AUC2451	SPRING, stop screw	1	Included in throttle stop screw kit.
55	AJD8104Z	NUT, throttle spindle	1
56	AUC1206	LOCK TAB, throttle spindle	1
57	AUD3151	LINK, throttle	1	For AUD317 carburetters.
58	AUD3152	LINK, spring anchor	1	For AUD317 carburetters.
59	AUD2884	BUSH, links	1	For AUD317 carburetters.
60	WZX981	IDLE ADJUSTING SCREW KIT	1
61	AUC8483	SCREW, idle adjusting	1	Included in idle adjusting screw kit.
62	AUC2451	SPRING, idle adjusting screw	1	Included in idle adjusting screw kit.
63	AUD2859	CHOKE CAM LEVER	1	For all carburetters except FZX1064.
	JZX1125	CHOKE CAM LEVER	1	For FZX1064 carburetters.
64	WZX1335	CHOKE RETURN SPRING KIT	1
65	AUD2432	SPRING, cam lever	1	Included in choke return spring kit.
66	AUC1375	SPRING, pick up lever	1	Included in choke return spring kit.
67	AUD2429	WASHER, choke cam lever	1
68	AUC8400	BOLT, pivot	1
69	AUC8473	TUBE, pivot bolt, inner	1
70	AUD2430	TUBE, pivot bolt, outer	1
71	AUD2433	WASHER, distance	1
72	AUD9657	LEVER AND LINK, pick up	1	For AUD170 carburetters.
73	AUD9663	LEVER AND LINK, pick up	1	For AUD250 and AUD184 carburetters.
74	AUD2428	BRACKET, jet link	1	For AUD250 and AUD184 carburetters.
75	CUD2687	LEVER AND LINK, pick up	1	For AUD654 carburetters.
	CUD2973	LEVER AND LINK, pick up	1	For AUD679 carburetters.
	LZX1021	LEVER AND LINK, pick up	1	For FZX1016 and FZX1094 carburetters.
	CUD3073	LEVER AND LINK, pick up	1	For all other carburetters.
76	PTZ605	SCREW, link to jet	1	For AUD170 carburetters.
77	PJZ604	SCREW, link to jet	1	For all other carburetters..
78	AUC5002	WASHER, starlock, lever to link	1
79	12G2125	GASKET, air filter	1
80	AUD2219	GASKET, manifold and insulator	3
81	FNZ205	NUT, carburetter to manifold, 5/16 UNF	2	1964-74; not Canada 1972-74.
	FNZ206	NUT, carburetter to manifold, 3/8 UNF	2	1974-77; Canada 1972-76.
82	PWZ105	WASHER, plain	2	1964-74; not Canada 1972-74.
	PWZ106	WASHER, plain	2	1974-77; Canada 1972-76.

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Carburetters - single hs4 (not capstat) 1964-77

SPRING-THROTTLE STOP SCREW & IDLE ADJ.- HS CARBS

USE: WL700101

SPRING-JET LOCKING-HS CARBURETTERS

SCREW-PISTON GUIDE KEY-HS & HIF CARBURETTERS

SCREW-LOCKING-FIXED NEEDLE-H & HS CARBURETTERS

KEY-PISTON GUIDE-HS & HIF44 CARBURETTERS

NUT-JET LOCKING-HS CARBURETTERS

SPRING-PICK UP LEVER-CHOKE RETURN-HS4 & RH-TWIN HS2 CARBS.

SCREW-THOTTLE DISC TO SPINDLE-HS & HIF CARBURETTERS

FLOAT CHAMBER- HS CARBURETTERS-RH MOUNTING

PIN-PISTON LIFT-HS4 CARBURETTERS

PLATE-BAFFLE-FLOAT CHAMBER INLET-HS CARBURETTERS

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