With the season coming, and my needing 4 new batteries for my Ranger 620, I have been doing non-stop (well it seems like it) research on batteries.
Here is a tidbit supplied to me by a friend of a friend at Mercury Research and Development about their tested and recommended batteries.
A very concise list I think. Bear in mind, this is for Merc motors.
-MINIMUM 800CCA or 1000 MCA Capacity. More is better! Use Stainless Steel Lock nuts (don’t use wing-nuts).
-IF you have a lot of accessories you are running, KEEP IN MIND that this specification is for the ENGINE CRANKING BATTERY. You may need to INCREASE the battery specification to provide adequate cranking capacity based on your accessories being run!
(Recommended Batteries after Testing and information courtesy of Mercury Marine Research & Development)
-Odyssey PC1500, PC1700, PC2150 and PC2250.
-Optima Group 31
-West Marine Sea Volt Group 27 AGM.
-Cabela’s Advanced Angler ** Group 24 and 27.
-Trolling Thunder TT1175 and TT1370.
-Excide Megacycle (Mercury Brand) MC-31 and XMC-31.
-Sears Die Hard Platinum 34M and 31M.
-Deka Sea Mate 8A27M and 8A31DTM.
** During initial testing, these batteries do not meet their advertised cranking ratings.