Mercury MERCRUISER, Service Manual, Page: 357 / 566

Data Harness
!
WARNING
Prevent serious injury or death from a loss of boat control. Pulling on or flexing connectors can loosen terminals and cause
open or intermittent electrical connections, which will interrupt control of throttle and shifting. Do not pull on cable connectors
when pulling cables through the boat. Do not allow cables to flex at connection points. Fasten all electrical harnesses within
25 cm (10 in.) of any connection.
Connectors
IMPORTANT: Connectors should never have to be forced into the receptacle. Ensure that connectors are free of any lubricant
or dielectric grease before installation. When the connector is properly aligned, it will only take a small amount of pressure to
insert it into the receptacle. Rotate the locking collar to secure the electrical connection.
NOTE: Connect only one data harness of the required length between the engine and helm. If a data harness is too short, do
not connect multiple harnesses together to make up the required length. For installations requiring a data harness length longer
than 12.2 m (40 ft), contact Mercury Marine for more information.
Weather Caps
Weather caps are to be used whenever there are any unused connectors on a harness. Verify all connections are tight to
prevent moisture or corrosion occurring inside the connections.
Typical weather caps are as follows:
a - 10 pin cap
b - 5 pin cap
c - 3 pin cap
d - 2 pin cap
DTS Battery Specifications
IMPORTANT: Do not use deep cycle batteries for the main engine starting battery.
IMPORTANT: Boating industry standards (BIA, ABYC, etc.), federal standards and Coast Guard regulations must be adhered
to when installing the battery. Ensure that battery cable installation meets the pull test requirements and that positive battery
terminal is properly insulated in accordance with regulations.
IMPORTANT: It is recommended (required in some states) that the battery be installed in an enclosed case. Refer to
regulations for your area.
Minimum SAE Starting Battery Requirements ‑ BCI GRP 24
MCA
1000
CCA 800
Ah 180 (International Rating)
NOTE: Due to the wide variety of battery manufacturers throughout the world, ratings and physical battery sizes will vary.
Check with the manufacturer for a starting battery with a MCA, CCA, or Ah specification that will be equal to or greater than the
SAE Standard J537 specified previously.
IMPORTANT: For DTS products, each engine must be equipped with its own starting battery. If your boat application requires
additional battery loads for boat accessories or marine electronics, it is recommended that an auxiliary battery or batteries be
installed.
!
WARNING
Failure to properly secure the battery leads can result in a loss of power to the Digital Throttle and Shift (DTS) system,
leading to serious injury or death due to loss of boat control. Secure the battery leads to the battery posts with hex nuts to
avoid loose connections.
When connecting engine battery, hex nuts must be used to secure battery leads to battery posts. Torque nuts to specifications.
4958
a
b
c
d
Instrumentation and Controls
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 4D-27