STEYR MOTORS Marine Engine 2012 Series, Service Manual

Page: 273 / 274

Electrical System
Z001138-1_2013-02-01 46/47
06.12 Battery
Battery - Acid Test
(when using Acid batteries!)
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 M16 TCA
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 marine.12V supply of all electric and
electronic components on the engine (including instrument panel) by centre tapping.
Additional charge is guaranteed by charging equalization.
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. with 650A) . After discharge for 30 sec.,
the voltage should not drop bellow ³9V .
Capacity:
With a current consumption of 1/20 of specified capacity (e.g. with 115Ah)
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.