Data and Adjusting Values
| Type |
220Sb
|
230 230S 230/8
|
250S 250/8 Sedan (2.5 ltr) |
250/8 Cp (2.8) 250/8 Sd (2.8) 280S/8 Through 1971 |
250 Cp 250 Sd 1972 |
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| Carburetor Barrel |
1st
|
2nd
|
1st
|
2nd
|
1st
|
2nd
|
1st
|
2nd
|
1st
|
2nd
|
| Venturi "K" |
23
|
27
|
24
|
28
|
24
|
28
|
24
|
28
|
20
|
28
|
| Main Nozzle "GG" |
X112.5
|
X120
|
X115
|
X120
|
X115
|
X125
|
X115
|
X125
|
X100
|
X130
|
| Air Correction Nozzle "A" |
100
|
150
|
100
|
130
|
100
|
120
|
90
|
110
|
180
|
110
|
| Emulsion Tube "s" |
4S
|
4N
|
4S
|
4N
|
4S
|
4N
|
4S
|
4N
|
K30584
|
4N
|
| Idle Fuel Nozzle "G" |
45
|
-
|
45
|
-
|
45
|
-
|
45
|
-
|
45
|
-
|
| Progression Fuel Nozzle |
-
|
50
|
-
|
60
|
-
|
60
|
-
|
80
|
-
|
70
|
| Idle Air Bore (mm) |
1.5
|
-
|
1.3
|
-
|
1.3
|
-
|
1.3
|
-
|
1.4
|
-
|
| Progression Air Bore (mm) |
-
|
1.0
|
-
|
1.0
|
-
|
1.0
|
-
|
1.0
|
-
|
1.0
|
| Quantity Injected (c/c) |
0.8-1.2
|
0.7-1.0
|
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| Start of Injection |
5 deg off
idle
|
Immediately
|
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| Float (mm) |
18-20
|
21-23 with
Solid Needle pin / 18-21 with spring-ball needle pin
|
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| Fuel Return Valve |
Valve Pin
Fully in at 2000rpm
|
No Adjustment
|
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| Vent Valve (mm) |
2.8 (2.5
mm Minimum)
|
No Vent
Valve
|
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| Choke Gap (mm) |
2.6
|
2.4
|
2.0-2.2
|
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| Choke Fast Idle Speed |
220-2400
rpm with Vacuum Advance (Ground cable of switch in thermostat housing)
|
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| Choke Cover to 1970 |
Index Marks
aligned on both carburetors
|
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|
Align index
marks on front Carburetor --- Rear remains 5 mm towards Rich
|
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|
Align index
marks of both carburetors at second service
|
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| Vacuum Throttle Control |
Adjust at
idle: Hose off 1100 to 1200 with screw - hose on 0.1 mm clearance with
spring
|
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| Idle Lifting Switch |
Test Light
at Outlet of switch: Out at 1400 to 1600 rpm
|
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