Mercury 25 EFI FourStroke User Manual page 153

Description
Bolt
BATTERY CABLE CONNECTIONS
IMPORTANT: To prevent damage to the engine charging system
when the battery cables are not connected to a battery, ensure
the battery cable ends are thoroughly insulated.
Single Outboard
eng
INSTALLATION
a
b
(-)
Nm
6
(+)
c
15496
143
lb. in. lb. ft.
53
a - Red sleeve ‑
positive (+)
b - Black sleeve ‑
negative (–)
c - Cranking battery