4A•12 Fuel system - carburettor engines
13.6b Exploded view of the SU HS4 carburettor
1 Body
2 Piston lifting pin
3 Spring
4 Sealing washer
5 Plain washer
6 Circlip
7 Dashpot
8 Screw
9 Piston
10 Spring
11 Needle
12 Needle tension spring
13 Needle guide collar
14 Locking screw
15 Piston damper
16 Identification tag
17 Idle speed adjusting screw
and O-ring*
18 Idle speed adjusting screw
and spring
19 Gaskets
20 Insulator block
21 Float chamber and spacer
22 Gasket
23 Float
24 Hinge pin
25 Needle and seat
26 Float chamber cover
27 Baffle plate
28 Screw
29 Spring washer
30 Bolt
31 Spring washer
32 Plain washer
33 Throttle spindle
34 Throttle disc
35 Screw
36 Washer
37 Throttle return lever*
37a Throttle return lever
38 Progressive throttle (snail
cam)
39 Fast idle screw*
39a Fast idle screw and spring
40 Lockwasher
41 Nut
42 Jet assembly – Capstat type
43 Sleeve nut
44 Washer
45 Gland
46 Ferrule
47 Jet bearing
48 Jet locating nut
49 Jet adjustment nut and spring
50 Rod link and pick-up lever
51 Spring clip
52a Jet assembly
53a Pick-up lever non-Capstat
type
53b Link
53c Screw
54 Pivot bolt
55 Pivot bolt tube – inner
56 Pivot bolt tube – outer
57 Distance washer
58 Cam lever
59 Cam lever spring
60 Pick-up lever spring
61 Piston guide
62 Screw
*Used with sealed adjustment
carburettors
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