Benelli ZAFFERAN 250, Service Manual

Page: 49 / 187

49
2.3 Ignition system
check
*
Note
•
When there is no spark, check
whether there is loose wiring or poor
contact, and make sure all voltage
values are normal.
•
There are kinds of multimeters with
different impedances and different
test values.
multimeter
Connect a high-pressure shunt or an ammeter with an
input impedance above 10M
Ω10CV to the multimeter.
2.3.1 Primary voltage of the ignition
coil
If you replace the original spark plug with a better one, make
ground connection with the engine.
*
Note
Make sure all wiring is correct before
test. Cylinder compression pressure
normally refers to the test value when
the spark plug is installed on the
cylinder head.
Connect the lead of the ignition coil and also the shunt
between the primary coil terminal (black/white) and the
GND.
Press the startup motor or step the actuating lever to
measure the maximum primary voltage of the ignition
coil.
Minimum voltage: above 95V.
* Note
Never touch any metal part of the
test rod with your finger to avoid
electric shock.
2.3.2 Charging coil
* Note
Install the spark plug on the cylinder
head and carry out measurement
when the compression pressure is
normal.
Remove 4P connector and 2P connector from
RELATED PARTS group. Install a high-pressure
shunt between the charging coil with 2P connector
(red/white terminal) and 4P connector (black
terminal). Press the startup motor or step the
actuating lever to measure the maximum voltage of
the charging coil. Connection: positive pole to
red/white; negative pole to black.
Minimum
voltage: above 95V.
*
Note
Never touch any metal part of the test
rod with your finger to avoid electric
s
h
o
c
k
.
(B
：
bla
ck
R
：
red
W
：
whi
te
G
：
gre
en
BL
：
blu
e
)