Check the CO content. For the specified value, see the table in the section "Ignition system".
If the CO content deviates from the specified value, remove the seal from the CO content adjustment screw "2". To do this, pierce the plastic cap in the middle, screw in the appropriate screw or self-tapping screw and pull out the screw together with the seal. If necessary, remove the air filter and install it again.
Adjust the set CO content value by turning the adjusting screw.
Place a new filling.
Turn off the measuring instruments.
The 2B4 carburetor is installed on BMW-316 models produced before August 1983.
1 Air damper connecting rod
2 Enrichment tube. 2nd stage
3 Fork
4 Air filter mounting bolt
5 Air damper
6 Enrichment tube, 2nd stage
7 Fuel supply hose nipple
8 Ignition delay adjustment nipple
9 Connecting hose TN 10
10 Fuel supply valve
11 Carburetor cover
12 Float chamber body
13 Idle speed valve off
14 TN expansion element
15 Air damper cover retaining ring
16 Air damper housing
17 Vacuum Pulldown Box
18 Idle speed adjustment screw
19 Throttle valve assembly
20 Hose to Pulldown
21 Throttle valve adjusting screw
22 Hose to throttle valve controller
23 Fastening the gas cable
24 CO content adjustment screw
25 Hose to vacuum membrane
26 Pump drive lever
27 Vacuum membrane, 2nd stage
28 Pump rod with spring
29 Locking lever
30 Rotary return spring, 2nd stage
31 Segment lever
32 Throttle control
33 Gas cable segment
34 Throttle lever