The electrical system has three separate circuits:
the charging circuit, the starting circuit and the low
amperage circuit. Some of the electrical system
components are used in more than one circuit. The
battery (batteries), circuit breaker, ammeter, cables and
wires from the battery are all common in each of the
The charging circuit is in operation when the
engine is running. An alternator makes electricity for the
charging circuit. A voltage regulator in the circuit
controls the electrical output to keep the battery at full
The starting circuit is in operation only when the
start switch is activated.
The low amperage circuit and the charging circuit
are both connected to the same side of the ammeter.
The starting circuit connects to the opposite side of the
The alternator is a three phase, self rectifying
charging unit. The regulator for the alternator is part of
the alternator. The alternator is driven from the
crankshaft pulley by two V type belts.
The only part in the alternator which has
movement is the rotor. The rotor is held in position by a
ball bearing at the drive end and a roller bearing at the
The compartment for the regulator is sealed. The
regulator controls the alternator output according to the
needs of the battery and the other components in the
The starting motor is used to turn the engine
flywheel fast enough to get the engine running.
1. Field. 2. Solenoid. 3. Clutch. 4. Pinion. 5.
Commutator. 6. Brush assembly. 7. Armature.
The starting motor has a solenoid. When the start
switch is activated, electricity from the electrical system
will cause the solenoid to move the starter pinion to
engage with the ring gear on the flywheel of the engine.
The starter pinion will engage with the ring gear before
the electric contacts in the solenoid close the circuit
between the battery and the starting motor. When the
start switch is released, the starter pinion will move