Starter motor in a V6 engine

Type designation		Bosch DW 12V 0 001 108 172
Power	kW	1.4
No. of teeth on starter motor pinion		9
Number of teeth on ring gear		135
Ratio engine/starter motor		15:1

Test values

Not under load, 12 V	rpm A	2800 80
Under load, 9 V	rpm A	1400 295
Under load, 7.5 V	rpm A	770 510
Lowest engaging voltage for the solenoid switch	V	7.5