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10-2.
Connection
s
1
Fig
10-1.
Connect meters in accordance with the connection diagram when checking the performance
of the flywheel magneto.
10-3. Spark Plug Cross-Reference Table
The standard s p ark plug for
thread diameter and 12.7 mm
correct in what is called the "heat range" as well as the size of the threaded part.
wrong heat range spark plug causes overheating, hard starting, etc.
correct, the spark plug shows a light brown appearance, sometimes with greyish deposits.
If the standard spark plug is apt to overheat with a white appearance due to hot climates or
severest operation, try a
Diagram
Mag
Mag
Flywheel magneto
LC
Lamp coil
'
SE
Selenium rectiti
er
B
Battery
Head
lamp
HL
TL
Tail lamp
ML
Lamps in speedometer
Connection diagram for checking magneto performance
h
e MT50 engine is
t
(0.5
in
)
in reach.
.
c older spark plug
l
A
D.
B
C. ammeter (charging current inspection
A.
VL
C. voltmeter !lighting voltage inspection
D.
C.voltmeter (battery voltage inspection)
VB
s
Three prong gap tester
PC
Primary coil
LC
Lamp coil
IS
Ignition switch
NG K BP-4H
Bear in mind that the spark plug must be
K BP-6H
.
(NG
)
HL
Tl
ML
l
l
which is
14
(0.55 in) in
mm
When the heat range is
The
75
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