Mercury 250 XS OptiMax Operation, Maintenance & Installation Manual page 114

BATTERY INFORMATION (ALL BATTERIES INCLUDING DTS)
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.
• Do not use deep cycle batteries. The engine must use a marine starting
battery with 1000 MCA, 800 CCA, or 180 Ah rating.
• When connecting the engine battery, use hex nuts to secure the battery
leads to the battery posts. Tighten the nuts to the specified torque.
Description
Hex nuts
A decal advising against using deep cycle batteries and wing nuts should be
placed on or near the battery box for future service reference. One 5/16 in. and
one 3/8 in. hex nut is supplied per battery for wing nut replacement. Metric hex
nuts are not supplied.
OUTBOARD INSTALLATION
WARNING
!
NOTICE
DO NOT USE DEEP CYCLE BATTERIES!
IMPORTANT:
Refer to the outboard owner's manual for
battery requirements.
Battery cable size and length is critical.
Refer to engine installation manual for
size requirements.
Place decal on or near battery box for future
service reference. Included with the engine
rigging components are 5/16" and 3/8" hex
nuts to be used for battery terminal wing nut
replacement. Metric hex nuts must be obtained
locally.
Nm
13.5
13.5Nm (120 lb-in.)
DO NOT
USE
WINGNUTS
8M0085862
54395
104
lb‑in. lb‑ft
120 –
eng