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ELECTRICAL SYSTEM
Engine 12-Volt DC Control Circuit
The Westerbeke 40NA propulsion engine
has
a 12-Volt DC electrical control circuit, as shown on the wiring
diagrams which follCM' on pages 40 and 41. Refer to these diagrams when troubleshooting or servicing
electrical components on the engine.
CAUTION
To avoid damage to the battery charging circuit,
never
shut off the engine battery switch while
the engine Is running.
When the engine Is not running, shut OFF the engine's battery switch to avoid electrical shorts
when working on the engine electrical circuit.
Note that the engine's control
system (electrical System) is
protected by a 20-Ampere
manual reset circuit breaker lo-
cated
on the rear lifting bracket.
Battery
Specification
Pret-.eat Solenoid
DC Circuit Breaker
The minimum recommended capacity of the battery used in the engine's 12-Volt DC control circuit
is
125 -
150 Ampere-hours (minimum).
CAUTION
When quick-charging the battery with an external charger,
be
sure to disconnect the battery
cables from the battery. Leaving the charging circuit connected while quick-charging will
damage the alternator's diodes.
37
Westerbeke Diesel Engines
I
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