what battery?? will this one work?

[kdgncop]

i have a 19 foot bayliner with a 305 in it. the battery that is in it has the numbers 875 and 205 i believe. is this about the right battery?? it has needed a charge about each time out since i bought the boat so i was looking for a new one. i found one at walmart that is a 625 but then 500 on the second number. will this one work?/ what battery do i need ideally?? also, is it a dual since it is used to start the motor also?? thanks in advance. looking to buy tonight or tomorrow.!

 

[lenny2113]

Re: what battery?? will this one work?

875 - is the number indicating crancking amp power. For 305 engine, I would not go any lower then 875 amp. 625 amp may be a little lower then what you need. I am not sure what the second number is... may that be "hours to discharge"?

 

[kdgncop]

Re: what battery?? will this one work?

so then i really need to worry about the first number for cranking and starting. <br /><br />what would be considered overkill then??<br /><br />anyone know what the second number is then??

 

[cuzner]

Re: what battery?? will this one work?

second # sounds like amp hour rating. Thats the amount of reserve power your battery has. Its important if you use alot of electronics, specialy if you spend time on your boat the engine off. If this is the case you may want to look into a 2 battery set up, with a swich. 1 battery for starting (high cranking amps) and one for your stereo and every thing else (high reserve). A little more money, but it will pay for itself if you avoid a towing charge.<br /><br /> Jim

 

[jtexas]

Re: what battery?? will this one work?

The first number is MCA (Marine Cranking Amps), the number of amps a battery can deliver for 30 seconds at 32* F and still maintain at least 7.2 volts. The second number is CCA (Cold Cranking Amps), which is amps at 0*F.<br /><br />There should be a third number much lower than the other two, RC (Reserve Capacity) which is the number of minutes a batt will last at a 25-amp draw and still maintain at least 10.5 volts.