Mercury 250 Specifications download pdf (Page 105)

OUTBOARD INSTALLATION

Decal needs to be placed on or near battery box for future service

reference. One 5/16 in. and one 3/8 in. hex nut are supplied per

battery for wing nut replacement. Metric hex nuts are not supplied.

NOTICE - DTS & OptiMax Engines

DO NOT USE DEEP CYCLE BATTERIES!

DTS (Digital Throttle and Shift) applications and

OptiMax engines must use a marine starting

battery with 1000 MCA, 800 CCA, or 180 Ah. rating.

IMPORTANT:

Battery cable size and length is critical. Refer to

engine installation manual for size requirements.

DO NOT

USE WING

NUTS

37-895387

3486

13.5Nm (120 lbs. in.)

Place decal on or near battery box for future service

reference. 5/16” and 3/8” hex nuts supplied for wing

nut replacement. Metric hex nuts not supplied.

BATTERY CABLE CONNECTIONS

Single Outboard

(+)(+)

(-)(-)

15496

a - Red sleeve ‑ Positive (+)

b - Black sleeve ‑ Negative (–)

c - Cranking battery

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Mercury 250 Specifications Page 105