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Posted

Hey guys - bought a boat off of Kijiji with no battery, but 125HP Mariner.

 

Also has a fish finder, radio and of course running lights.

 

Do I need two battery setup to run all of this stuff?

 

A starting and a deep cycle or can I run it all off of one battery?

 

Also - where is the best place to buy? Of course I'm looking to save money but if warranty outweighs savings, then I'm open to that.

 

Thanks in advance - I've only really ever owned a small boat that didn't really need a battery.

 

 

Posted (edited)

You definitely need a battery. A single marine starting battery should be able to handle it. Walmart and Costco have good value for your money.

 

 

 

 

Stupid question -

 

As the motor runs does it charge the starting battery? I assume the answer is yes - but like I said, I'm a real noob at this.

 

Thanks

Edited by Wask
Posted

A 125hp will. Some of the smaller motors do not have alternators to charge a battery. But larger motors will come with an alternator to charge the battery. As long a you are not running an electric trolling motor, the main motor should keep your battery charged.

Posted

Also get a on-board charger as some engines are not that good at charging a battery, especially if you don't run far with it......best to plug that boat in and leave it plugged in until the next fishing trip.

Posted

^^^ What Mister said. People think because the outboard can deliver charge to a battery it will keep a battery fully charged. Then they run 10 mins down the lake at half throttle and fish for 2 hours while listening to the radio, running graphs and using livewells.

For what you're doing, get one decent battery and put it on a charger after every use.

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