Electrical Analysis - Yamaha 25J Manuel D'entretien

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ELEC

ELECTRICAL ANALYSIS

ELECTRICAL ANALYSIS
INSPECTION
Digital circuit tester
NOTE:
Throughout this chapter the digital circuit
tester's part number has been omitted.
Refer to the following part number.
Digital circuit tester:
J-39299/90890-06752
NOTE:
" " indicates a continuity of electric-
ity; i.e., a closed circuit at the respective
switch position.
Peak voltage measurement
NOTE:
When checking the condition of the igni-
tion system it is vital 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 defected,
the peak voltage will be lower than speci-
fication.
If the peak voltage measurement is not
within specification the engine will not
operate properly.
A low peak voltage will also cause compo-
nents to prematurely wear.
Peak voltage adaptor
NOTE:
Throughout this chapter the peak voltage
adaptor's part number has been omitted.
Refer to the following part number.
The peak voltage adaptor should be used
with the digital circuit tester.
Peak voltage adaptor:
YU-39991/90890-03169
8-10
E