Merc 90 Battery Suggestions

[godspede619]

Gettin ready to buy a couple new batteries for my bayliner trophy with a 90 merc powering it. Last season a was using two used deep cycle batteries. have a switch so i can use both batts seperate or together. I was thinking about buying one new deep cycle for running electronics and one cranking battery for starting the motor...Is this a good idea? or is it better to run two deep cycles? If a regular automotive battery is good to use what is the minumum cranking amps i should be pushing for a 1996 90 merc?. I had a few issues last season with some dead battteries so im just trying to get this worked out...

 

[saumon]

Re: Merc 90 Battery Suggestions

I was thinking about buying one new deep cycle for running electronics and one cranking battery for starting the motor...Is this a good idea?

Absolutely, that's what you have to do! Deep cycle battery were not intended to power a starter. That's probably why you had problem. And use a marine type battery.

Yes, an automotive battery can do the jod, and a deep cycle too in case of emergency, but it will be cheaper to buy the right stuff right away than burning a couple of battery...

 

[trehanejox]

Re: Merc 90 Battery Suggestions

I bought one of those trickle chargers that uses solar power. Fantastic little thing that stops the hassle of bringing the battery off the boat to charge. I use a fair amount of power on the boat, but it rains alot here in england and I was more worried about the bilge pump running out of juice when she's on her mooring..

75/90 hp 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

 

[godspede619]

Re: Merc 90 Battery Suggestions

im glad i got that straight...i bought the boat used last year and did alright last season...so a good deep cycle for electronics and radio. then get a marine type cranking battery with a min of 465 cranking AMPS.

will it cause any damage to the motor if you run a cranking battery that has high cranking amps....? like 1000?

 

[saumon]

Re: Merc 90 Battery Suggestions

will it cause any damage to the motor if you run a cranking battery that has high cranking amps....? like 1000?

Not at all. Cranking amps are like horsepowers, you never had too much...