ELECTRICAL SYSTEM
Page ELECTRICAL SYSTEM - 94
Z001019/0_6_July 2008
SERVICE MANUAL MARINE ENGINES
06.12.
BATTERY
06.12.01 Battery
Battery - Acid Test
The battery provides the starter engine with energy and supplies the required voltage for lighting and
other electrical equipment when the engine is not running. During the starting procedure and when the
generator does not generate any current, the battery provides the electronic engine management
system with voltage.
For 4 cyl. engines only
Use a 12 V battery with a cold test circuit of 450 ampere at -18°C and a capacity of 92 Ah at 27°C, to
guarantee the supply of the electric and electronic components for all operating conditions.
For 24 V - installation only
Use two 12V batteries with a cold test circuit of 650 ampere each at -18°C and a capacity of 115 Ah
at 27°C, to guarantee the supply of the electric and electronic components for all operating conditions.
The batteries are connected in series and provide a capacity of 115 Ah / 24 V for the external supply
of all electric components on the boat.
12V supply of all electric and electronic components on the engine (including instrument panel) by
center tapping. Additional charge is guaranteed by charging equalization.
For 6 cyl. engines only
Use a 12 V battery with a cold test circuit of 650 ampere at -18°C and a capacity of 115 Ah at 27°C,
to guarantee the supply of the electric and electronic components.
Explanation:
Cold current test:
The cold current test is a specified load test of a battery.The
charge of battery with specified current (e.g. 450A).
After discharge for 30 sec., the voltage should not drop bellow
³9
V.
Capacity:
With a current consumption of
1
/
20
of specified capacity (e.g. 92Ah) the battery
voltage must not fall below 10 V after 20 hours, to guarantee the engine's
starting ability.
Maintenance
To guarantee long battery life, the following tests should be carried out periodically.
1
The level of battery acid must always be above plates and separators. The acid level should reach the
marking on the battery. Acid may only be refilled by an expert when it was definitely stated that some
of it has been spilled.
ATTENTION:
Battery fluid is an aggressive acid and must be handled with care. In case of skin
contact rinse thoroughly with water and consult a doctor - physician.
ToC
