The correct battery for a Mercury outboard motor

[genxer36]

Battery Ratings Note: These are minimum engine specifications. Additional electrical loads from the boat will require larger batteries.

FourStroke Models
9.9/15 & 25
465 Marine Cranking Amps (MCA) or 350 Cold Cranking Amps (CCA)
30/40, 45/50
Operation Above 32�F (0�C) 465 Marine Cranking Amps (MCA) or 350 Cold Cranking AMPS (CCA) Operation Below 32�F (0�C)
1000 Marine Cranking Amps (MCA) or 750 Cold Cranking AMPS (CCA)
75/90
Operation Above 32�F (0�C) 465 Marine Cranking Amps (MCA) or 350 Cold Cranking AMPS (CCA) Operation Below 32�F (0�C)
1000 Marine Cranking Amps (MCA) or 750 Cold Cranking AMPS (CCA) Ampere-Hours (Ah) 70 - 100

2-Stroke Models
6 - 15, 20/25, 30/40, 40/50 & 60
465 Marine Cranking Amps (MCA) or 350 Cold Cranking Amps (CCA)
75 - 125
525 Marine Cranking Amps MCA) or 450 Cold Cranking Amps (CCA)

V-6 Carb/EFI Models
135/200 & 225/250
630 Marine Cranking Amps (MCA) or 490 Cold Cranking Amps (CCA)

OptiMax Models
2.5L/3.0L
1000 Marine Cranking Amps (MCA) or 750 Cold Cranking AMPS (CCA)



Taken from the Mercury webpage -http://www.mercurymarine.com/service-and-support/storage-and-maintenance/faqs/outboards/?category=electrical