8.9
Section 8
Electrical System and Components
8
Figure 8-8. Checking Battery Voltage.
Electrical Systems Wiring Diagrams and
Battery Charging Systems
Most engines are equipped with 15 amp regulated
battery charging systems. Some have 3 amp
unregulated systems with optional 70 watt lighting circuit.
Refer to the following wiring diagrams and
troubleshooting guides to test and service system.
NOTE: Observe the following guidelines to prevent
damage to the electrical system and
components.
Figure 8-9. 3 amp/70 Watt Stator.
1. Make sure the battery polarity is correct. A
negative (-) ground system is used.
2. Disconnect the battery cables (negative (-) cable
first), before doing electric welding on the
equipment powered by the engine.
3. Prevent the stator (AC) leads from touching or
shorting while the engine is running. This could
damage the stator.
Lighting
Lead (Yellow)
Charging
Lead (Black)
Lighting Stator
3 Amp
Charging
Stator
Diode
DC
Voltmeter
Battery
Battery Test
Test the battery voltage by connecting DC voltmeter
across the battery terminals - crank the engine. If the
battery drops below 9 volts while cranking, the battery
is discharged or faulty. Refer to Figure 8-8.
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