Ignition System - Yamaha FT25B Ergänzung Zur Wartungsanleitung

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ELEC
ELECTRICAL COMPONENTS ANALYSIS/

IGNITION SYSTEM

8040
ELECTRICAL COMPONENTS
ANALYSIS
MEASURING THE PEAK VOLTAGE
NOTE:
• When checking the condition of the igni-
tion system it is useful to know the peak
voltage.
• Cranking speed is dependant on many
factors (e.g., fouled or weak spark plugs, a
weak battery). If one of these is defective,
the peak voltage will be lower than speci-
fication.
• If the peak voltage measurement is not
within specification the engine will not
operate properly.
• When checking the condition of any part,
be sure to make your determination based
on the specified peak voltages. (All the
resistance values listed below the peak
voltage data given in this section are ref-
erence data.)
IGNITION SYSTEM
CHECKING THE CHARGE COIL
Measure:
• Charge coil output peak voltage
Below specification → Replace the
charge coil.
Output peak voltage
Green/white (G/W) –
White/green (W/G)
Cranking
r/min
Unloaded Loaded
D.C. V 189
Peak voltage adaptor
YU-39991 / 90890-03169
Charge coil resistance
(reference data)
Green/white (G/W) –
White/green (W/G)
660 - 710 Ω at 20 ˚C (68 ˚F)
– 82 –
1,500 3,500
193 194 194
E
8
8
8
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