Westerbeke 20B TWO/30B THREE User Manual

The charging system consists of an alternator with an internal voltage regulator, an engine-mounted circuit
breaker, a battery and connecting wires.
Because of the use of IC's (integrated circuits), the eleCtronic voltage regulator is very compact and is built
into
the rear bracket of the alternator.
Charging
Voltage Test
If you suspect that the alternator is not producing enough voltage to charge the engine's battery, perform
the following voltage test.
ANPHETER
r- __________ ~e{A e
Interconnections for Charging Voltage Test
1. Using a voltmeter, connect the voltmeter's red wire dip to the B output terminal on the alternator. Refer
to the schematic shown above.
2. Connect the other wire dip to a ground on the engine.
3. Stan the engine and increase the engine's speed to 2000 rpm. Now record the reading given by the
voltmeter.
The voltage reading for a properly operating alternator should be between 13.5 to 14.5 volts. If your alter-
nator is over or under charging, have it replaced or rebuilt by a reliable service shop.
NOTE: Before removing the alternator for repair, rnake sure 12-Volts excitation is present at
the R terminal should the above test show only battery voltage at the B output terminal.
Engines & Generators
24

Westerbeke 20B TWO/30B THREE Specifications

General

Brand	Westerbeke
Model	20B TWO/30B THREE
Category	Engine
Language	English