Section 05 ELECTRICAL
Sub-Section 07 (TESTING PROCEDURE)
05-07-12
RESISTANCE MEASUREMENTS
As an alternate method, magneto system compo-
nents can be checked with a digital ohmmeter.
NOTE :
All resistance measurements must
be performed with parts at room tempera-
ture (approx. 20°C (68°F)). Temperature greatly af-
fects resistance measurements.
Disconnect connector at ignition coil and magneto
junction. Measure resistance between each ter-
minal. Refer to the following table for values and
wire colors.
NOTE :
An ignition coil with good resistance
measurement can still be faulty. Voltage leak
can occur at high voltage level which is not detect-
able with an ohmmeter.
➀ The primary winding of ignition coil can be measured because there is no external connection.
'
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PART NAME WIRE COLOR* RESISTANCE OHM REMARKS
MAGNETO
Trigger
coil
RD with
engine ground
140 - 180
No display change
means open circuit.
Ignition
generator coil
WH with GN 230 - 330
Lighting
generator coil
YL with YL
/
BK
0.23 - 0.28
IGNITION
COIL
Secondary winding
➀
(spark plug
cap removed)
End of each high
tension wire
5.1 - 6.3 K
(5100 - 6300)
Display showing
zero (0) means
short circuit.
SPARK PLUG
CAP
Spark plug cap
— 4.5 - 5.5 K
*
COLOR CODE
BK – BLACK
WH – WHITE
RD – RED
BL – BLUE
YL – YELLOW
GN – GREEN
GY – GREY
VI – VIOLET
OR – ORANGE
BR – BROWN
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