for the replacement of most 4 cyl. CCW 'Lucas'-distributors
 
The 123\GB-4-A-V replaces most 4 cyl. Lucas-distributors for engines in Great-British (hence 'GB') cars.

Note that there are dedicated 123-ignitions for Mini, Jaguar & MG.

Please check if the distributor need a connection for a mechanical rev.counter, as a 123\GB-4-A-V does not offer this.The unit offers a maximum total of 16 advance-curves to be selected by the end-user.
Please take a look in the table below for available advance curves.
SPECIFICATIONS
cylinders: 4
direction: CW/CCW
voltage: 4,0-15,0 Volts
range: 500 - 8000 rpm
temperature: -30 to 100 Celsius
coil: stock or High Energy coil, primary coil NOT below 1,0 ohm
dwell: constant current, fully autom.
time-out: after 1 second current is switched off
spark-bal.: better than 0,5 degr. crankshaft
vacuum: starts at 100 mmHg, ends at 10 degr. @ 300 mmHg
max.advance: 45 degr. crankshaft
wiring: red = +6V or +12V, black = '-' coil


Installation manual 

Curve table data
123\GB-4-A-V
 advance startsmax. advancevac. adv. startsmax. vac. adv.  
curve[rpm crankshaft][rpm/degr. crankshaft][mmHg][mmHg/degr.]replacesremark
0 1000 4200 17,0 100 300 10,0 LUCAS 2000/5,0
1 1000 3600 17,0 100 300 10,0 LUCAS 2000/6,5
2 1000 3000 17,0 100 300 10,0 LUCAS 2000/8,4
3 1000 2500 17,0 100 300 10,0 LUCAS 2000/11,0
4 1000 4500 20,0 100 300 10,0 LUCAS 2000/6,0
5 1000 4500 20,0 100 300 10,0 LUCAS 2000/8,0
6 1000 4500 20,0 100 300 10,0 LUCAS 2000/10,0
7 1000 4500 20,0 100 300 10,0 LUCAS 2000/12,0
8 1000 4500 23,0 100 300 12,0 LUCAS 2000/6,5
9 1000 4500 23,0 100 300 12,0 LUCAS 2000/9,0
A 1000 4500 23,0 100 300 12,0 LUCAS 2000/11,0
B 1000 4500 23,0 100 300 12,0 LUCAS 2000/13,0
C 1000 4500 26,0 100 300 14,0 LUCAS 2000/7,5
D 1000 4500 26,0 100 300 14,0 LUCAS 2000/10,0
E 1000 4500 26,0 100 300 14,0 LUCAS 2000/12,0
F 1000 4500 26,0 100 300 14,0 LUCAS 2000/14,0