Carburetors

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Carburetor Specs

The carbureted SM has three Weber 42 DCNF carbs.

On my 1972 they are the four-bolt version (not the five-bolt version) Brucem 18:34, 1 October 2009 (UTC)


Carburetor Jetting

English German Francais Italian Count
Quant.
42 DCNF 2
C114/1
From 100.000
42 DCNF 16
C114/1
From 150.000
42 DCNF 2/M
C114/1
From 200.000
42 DCNF 26/2
C114/11
From 350.000
42 DCNF 26M/2
C114/12
From 400.000
42 DCNF 30
C114/13
From 450.000
42 DCNF 31-32
Merak 3L
42 DCNF 44
AM 114/53/30
Number of top cover bolts n/a 4  ? 5 5 5 5 4  ?
Main Venturi Zerstäuber Diffusor Diffusore 2 32 32 32 36 36 36 36 36
Aux Venturi Gemisch-Austrittsrohr Centeur de melange Centatore 2 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5
Main Jet Hauptdüse Gicleur principal Getto principale 2 1.3 1.3 1.25 1.4 1.4 1.4 1.4 1.4
Emulsion Tube Mischrohr Tube d emulsion Emulsionatore 2 F25 F25 F25 F25 F25 F25 F25 A25
Air Corrector Jet Luftkorrekturdüse Calibreur d air d automaticite Correttore Getto d'Aria 2 1.8 1.8 1.8 1.7 1.7 1.7 1.6 135
Idle Jet Leerlaufdüse Gicleur de ralenti Getto minimo 2 0.5 0.45 0.5 0.6 0.6 0.7 0.6 0.65
Accelerator Pump Jet Düse Beschleunigerpumpe Injecteur de pompe Getto Pompa Acceleratore 1 0.4 0.4 0.4 0.5 0.5 0.5 0.4 0.4
Starter Jet Starterdüse Gicleur de reprise Getto avviamento 2 F7/80 F7/80 F7/80 F7/80 F7/80 F7/80 F7/80 110/F7
Float Needle Valve Schwimmernadelventil Pointeau Valvola a farfalla 1 1.75 1.75 1.75 2 2 2 2 2
Accelerator Pump Beschleunigerpumpe Pompa Acceleratore 1 1 1 1
Idle Air Nozzle Leerlaufluftdüse Calibreur d air de ralenti 2? 1.3 1.35 1.35 1.35

Carburetor Types

Picture of four-screw carb gasket
Weber four-screw top cover gasket.jpg


Picture of five-screw carb gasket
Weber five-screw top cover gasket.jpg


Weber Carburetor Parts Sources

Jets, parts, manuals

  • If you're looking for jets, tools, other parts...consider Pierce Manifolds in Gilroy (California). They have most parts.

As of 10/09 he had 24 kits in stock. Obviously you need three per car. Brucem 18:34, 1 October 2009 (UTC)