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#1
06-28-2015, 09:45 PM
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Which Battery is best?
I have a 1977 20'MA, with a 200 HP Mariner. Time to purchase my first set of batteries. I have a perko switch, 2 batteries, 1 deep cycle, 1 starting. Can anyone recommend a starting battery that would be appropriate? A good deep cycle battery? My only electronics at the moment are the standard lighting, an illuminated compass, a GPS and a fish finder. Any recommendations would be greatly appreciated.....
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#4
06-29-2015, 10:39 AM
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If you have a batteries plus in your neighbor hood check them out...good price, service, and warranty. go with the agms.
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[SIGPIC][/SIGPIC] "If You Done It...It Ain't Braggin" my rebuild thread: http://www.classicseacraft.com/commu...ad.php?t=18594
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#5
06-29-2015, 11:15 AM
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Some Gel and/or AGM batteries require a different charging voltage for optimum life, so you might want to research that requirement to see if it's compatible with what your motor puts out. The reason I mention this is that on some new cars, the engine computer software that controls the alternator output must be tweaked if you change the battery! I personally think a good quality lead acid battery like a Deka is still the best bang for the buck!
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'72 SeaFari/150E-Tec/Hermco Bracket, owned since 1975. http://i188.photobucket.com/albums/z...Part2019-1.jpg
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#7
06-29-2015, 08:42 PM
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Do not mix batteries on the same charging system !!
The charging system will fail trying to charge a deep cycle and a starting battery... The outboard does not produce enough amperage to compensate for the deep cycle. Two standard starting batteries will surfice just fine.. The two major battery manufactures are Johnson Control and Globe. They all come from these two and are labeled with whoever markets them. Just my 2¢ worth.. BTW: Welcome to CSC
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See ya, Ken ©
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#8
06-30-2015, 08:01 AM
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Quote:
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#9
06-29-2015, 10:30 PM
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The biggest things to limit starting motor performance are the starter, cable connections, cable diameter, cable length, and the battery. If the battery is new, and fully charged regularly, then I think the type is mostly irrelevant. Certainly the outboard wasn't engineered to work with an AGM but not a flooded battery. And for recreational use, I think overcharging is far less likely than undercharging. And letting an undercharged battery sit is bad for life. There are only a few manufacturers but lots of brands. And generally capacity is related to the amount of lead and not a lot else. Starting power is related to plate surface area. Get the newest flooded battery you can- check the date code. And verify the cables and starter are in good shape. I have had more expensive batteries quit than Wal-Mart ones.
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#10
06-30-2015, 08:10 AM
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I've used Interstate batteries for more than twenty years with no problems.Currently,on my Tsunami,I'm running two batteries,one is a grp 24 marine cranking battery and the other is a grp 27 deep cycle.These are in conjunction with a perko switch.
God, I'm terrible with my batteries,I rarely check them,and I keep saying that I'll switch back and forth from day to day,or that I'll always run the deep cycle when I'm trolling with the elec.downriggers,vhf.radar, etc all on.The truth of the matter is I forget,so god only knows how many hours are on each one. Been 6 years now,they still test good,but maybe one of these days it's going to be time for a couple new ones. I think I'll have to put a big sticker next to the ignition switch that reads, " HEY! STUPID, CHECK THE BATTERIES"
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All this,just for a boat ride
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