Battery Cable Size; Replacement Parts; Recommended Battery - Mercury 225 EFI Service Manual

CHARGING & STARTING SYSTEM

Battery Cable Size

If standard (original) battery cables are replaced with longer cables, the wire gauge size must increase. See
chart below for correct wire gauge size.
8 ft. 9 ft. 10ft.
2.4m 2.7m 3.0m
Models
6-25 Hp
#8* #8 #6
30-115 #6* #4 #4
Hp
125-250 #6*
Hp (ex-
cept
DFI)
DFI
Models
= Standard (original) Cable Length and wire gage size.
*

Replacement Parts

Electrical, ignition and fuel system components on your Mercury Outboard are
designed and manufactured to comply with U. S. Coast Guard Rules and Regula-
tions to minimize risks of fire and explosions. Use of replacement electrical, igni-
tion or fuel system components, which do not comply with these rules and regu-
lations, could result in a fire or explosion hazard and should be avoided.

Recommended Battery

A 12 volt marine starting battery with a minimum Cold Cranking amperage rating of 490
amperes or 630 (minimum) Marine Cranking amperes should be used.
Deep-cycle batteries are not suitable for use as engine starting batteries or for
use as accessory batteries that are connected to high output engine charging
systems. Deep-cycle battery life may be shortened by high output engine charg-
ing systems. Refer to individual battery maker instructions for specific battery
charging procedures and applications.
Page 2B-4
Battery Cable Length
Battery Cable Wire Gage Size
Mercury/Mariner Outboards
Battery Cable Length
11ft. 12ft. 13ft. 14ft. 15ft.
3.4m 3.7m 4.0m 4.3m 4.6m
Wire Gage Size No. SAE
#6 #6 #6 #4
#4 #4 #4 #2
#6 #4 #4 #4
#4* #2 #2
Î
Wire Gage Size
Î
16ft. 17ft. 18ft. 19ft.
4.9m 5.2m 5.5m 5.8m
#4 #4 #4 #4 #4
#2 #2 #2 #2 #2
#4 #4 #4 #2 #2
#2 #2 #2 #2 #2
WARNING
CAUTION
20ft. 21ft. 22ft. 23ft.
6.1m 6.4m 6.7m 7.0m
#4 #4 #2 #2
#2 #2 #0 #0
#2 #2 #2 #2
#2 #2 #0 #0
90-884294 OCTOBER 2001
24ft.
7.3m
#2
#0
#2
#0