Start Using Auxiliary Batteries - Volvo Penta D25A MS Operator's Manual

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Start using auxiliary batteries

WARNING! Ventilate well. Batteries generate
oxyhydrogen gas, which is extremely flammable
and explosive. A short circuit, naked flame or
spark can cause a powerful explosion.
Never reverse the polarity of the battery. Risk of
sparks and explosion.
1. Make sure the rated voltage of the auxiliary bat-
tery is the same as the system voltage of the
engine.
2. Connect the red auxiliary cable to the discharged
battery's + terminal and then to the auxiliary
battery's + terminal.
3. Connect the black jump lead to the auxiliary bat-
tery negative terminal and then to a position
slightly away from the discharged batteries, for
example at the negative cable's connection to the
starter motor.
WARNING! The black auxiliary cable (–) must not
come in contact with the positive connection on
the starter motor.
4. Start the engine and run at fast idling speed for
about ten minutes to charge the batteries.
WARNING! Working on or approaching a running
engine is a safety hazard. Beware of rotating
parts and hot surfaces.
WARNING! Do not touch the connections while
attempting to start; Risk of sparks. Do not bend
over the batteries either.
5. Stop the engine. Remove the auxiliary cables in
reverse order to connecting.
Operation
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