MOTO GUZZI V1000 G5 Workshop Manual page 138

100L-____________________________ --"
OISTRIBUTOR
"'''IN UNE VOLTAGE
SPEED
VOLTS
'Om
8 75
12
450
12 1500
136
24.9 IGNITION COILS (fig. 190)
The Maralli 8M 200 C coils consist of two windings :
the primary which is formed by a few hundreds turns
of fairly thick wi re and the secondary by a few thou·
sands turns of thinner gauge wire.
Testing data
Specifications
Vollage
0 10 of coil
Employment
N. of cylinders
12 V
46 mm (1 .77")
on motor vehicles
1
or
2
The hot engine measurement shou ld be made after
at least 2 hours operation at nominal current with
distributor at 900 rpm .
Each test lasts 10 seconds during which the spark
should be regular. Critical length of spark can be
defined as the spark gap distance at which one starts
to note no sparking.
Perforation test
At the temperature of 20' C
±
S ' , ensure the coil
stands up to a tension of 1000 V eft. (SO Hz) applied
for 3 seconds between a primary clamp and tha cas-
Ing without electrical discharges.
Winding resistance at 20' C
Primary
Secondary
Coli tests
3.25
n
±
SOlo
6.200
n
± ,
f'iJ/o
Connect up the coi l as shown in the diagram, inser-
ting in the ci rcuit a 3 point normalized spark gap
instrument as used for 4 cylinder engines (i.e. S 86 A)
having a SO' ± 3- contact closing angle.
Turning the distributor at the specified speed and
feeding the coil at the current specified in the follow-
ing table, the following spark plug values should
be obtai ned.
CRITICAl. l.ENGTH OF SPARK
COLO HOT
mm mm
8 6
10 9
7 6