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HOLLY MODEL 1920

Carburetor

Illustrated Parts Break Down

1) Automatic Choke 
Assy.

2) Choke Plate 
Assy.

3) Choke Shaft & 
Lever Assy.
 
4) Choke Lever

5) Choke Control
Lever

6) Choke Control
lev. Swivel Scr.
 
7) Main Well & 
Economizer Body 
Scr. & L.W. (Short)

8) Main Well & 
Economizer Body 
Scr. & L.W.(Long)

9) Fuel Bowl Scr.
& L.W.

10) Throt. Plate 
Scr. & L.W.

11) Choke Plate 
Scr. & L.W. 
12) Econ. Body Scr.
& L.W.
 
13) Wire Clamp Scr.
& L.W.

14) Therm. Cover
Clamp Scr. & L.W.

15) Fast Idle Cam 
Screw

16) Choke Lever 
Screw

17) Mechanical Vent
Scr. & L.W.

18) Throt. Adapter
Scr. & L.W.

19) Dashpot Bracket
Screw

20) Choke Brkt.
Retainer Screw

21) Wire Bracket 
Screw

22) Choke Piston
Plug 
23) Fuel Inlet Seat
Gasket
 
24) Economizer 
Body Gasket

25) Float Bowl 
Gasket

26) Flange Gasket

27) Therm. Housing
Gasket

28) Throttle Plate

29) Throt. Lever 
& Shaft Assy.

30) Throt. Lever
Drive Assy.

31) Idle Adjusting
Needle

32) Float & Lever
Assy.

33) Fuel Inlet 
Needle & Seat
Assy.

34) Main Jet
35) Mechanical 
Vent Valve

36) Economizer 
Stem Assy.

37) Economizer 
Body Cover Assy.

38) Fuel Inlet Seat
"O" Ring Seal

39) Diaphragm 
Push Rod Sleeve
Ball

40) Pump 
Operating Link

41) Choke Piston Link
42) Choke Diaphragm Link 43) Float Bowl 44) Main Well & Econ. Body & Plugs Assy. 45) Pump Diaphragm & Rod Assy.
 
HOLLY MODEL 1920 Exploded view
46) Choke 
Diaphragm Assy. 
Complete

47) Float Spring 
Retainer
 
48) Mechanical 
Vent Spring 
Retainer

49) Choke 
Diaphragm Link
 Retainer

50) Idle Adjusting 
Needle Spring

51) Pump Return 
Spring

52) Pump 
Operating Spring

53) Mechanical 
Vent Spring
54) Float Spring

55) Choke Lever
Spring

56) Wire Clamp 
Screw Nut

57) Dashpot Nut

58) Fast Idle Cam

59) Pump Push 
Rod Sleeve
  
60) Mechanical Vent Rod 61) Fast Idle Rod 62) Choke Piston Assy. 63) Dashpot Bracket Lock Washer
64) Wire Brkt. 
Scr. L.W.

65) Pump Operating
Link Washer

66) Mechanical Vent
Spring Washer

67) Choke Therm. 
& Cap Assy.

68) Pump Operating
Link Retainer

69) Choke Piston
Link Retainer Ping

70) Choke Therm. 
Cover Clamp

71) Wire Clamp

72) Wire Bracket
73) Dashpot 
Bracket

74) Choke Vacuum
Hose

75) Dashpot Assy.

76) Fuel Inlet 
Baffle Assy.

77) Mechanical 
Vent Control Lever

78) Mechanical 
Vent Operating
Lever
 
79) Pump Operating
Lever

80) Pump Operating
Lever Retainer

81) Throttle Lever
Bushing
 

The illustrated parts break down illustrates individual part placement in the assembly.