MerCruiser 13, Service Manual

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4A - 2 - STARTING SYSTEM 90-816462 2-695
Replacement Parts Warning
! WARNING
Electrical, ignition and fuel system components
on your MerCruiser are designed and manufac-
tured to comply with U.S. Coast Guard Rules and
Regulations to minimize risks of fire and explo-
sion.
! WARNING
Use of replacement electrical, ignition or fuel sys-
tem components, which do not comply with these
rules and regulations, could result in a fire or ex-
plosion hazard and should be avoided.
Battery
Battery Cold Cranking Amperage
3.0L/3.0LX
375 cca, 475 mca,
90Ah
Battery Cable Recommendations
IMPORTANT: Terminals must be soldered to
cable ends to ensure good electrical contact. Use
electrical grade (resin flux) solder only. Do not
use acid flux solder, as it may cause corrosion
and failure.
Cable Length Cable Gauge
Up to 3-1/2 Ft. (1.1 m)
3-1/2 - 6 Ft (1.1-1.8 m)
6 - 7-1/2 Ft. (1.8-2.3 m)
7-1/2 - 9-1/2 Ft.
(2.3-2.9 m)
9-1/2 - 12 Ft. (2.9-3.7 m)
12 - 15 Ft. (3.7-4.6 m)
15 - 19 Ft. (4.6-5.8 m) 4 (25 mm
2
)
2 (35 mm
2
)
1 (50 mm
2
)
0 (50 mm
2
)
00 (70 mm
2
)
000 (95 mm
2
)
0000 (120 mm
2
)
Both positive (+) and negative (–) cables
Precautions
! WARNING
Hydrogen gases that escape from the battery dur-
ing charging are explosive. Be sure that battery
area is well ventilated and that bilge blower is in
operation when charging. DO NOT smoke or al-
low sources of spark or open flame in area when
charging battery.
! WARNING
Do not use jumper cables and a booster battery
to start engine. Do not recharge a weak battery in
the boat. Remove battery and recharge in a venti-
lated area away from fuel vapors, sparks or
flames.
! WARNING
Battery electrolyte is a corrosive acid and should
be handled with extreme care. If electrolyte are
spilled or splashed on any part of the body, IM-
MEDIATELY flush the exposed area with liberal
amounts of water and obtain medical aid as soon
as possible. Safety glasses and rubber gloves are
recommended when handling batteries.
! CAUTION
To prevent damage to the electrical system be
sure to adhere to the following:
•
When installing battery, be sure to connect
the POSITIVE (+) battery cable to POSITIVE
(+) battery terminal first and then the NEGA-
TIVE (–) battery cable to NEGATIVE (–) battery
terminal.
•
Never disconnect the battery cables while the
engine is running.
•
If a charger or booster is to be used, be sure to
connect it in parallel with existing battery
(positive to positive and negative to nega-
tive).
•
When applying a booster charge to battery,
disconnect both cables from battery (to pre-
vent damage to voltage regulator).
•
Check battery condition periodically.
•
Make sure that battery leads are kept clean
and tight.