Nissan 40 HP, what size battery is this?

[surfstar]

I believe the battery is done for. I have a Nissan 40CE with electric and pull start. I've tried charging the battery at 6A for a couple days and it won't start it anymore. I've had the boat for a year and the battery worked fine for a while, I only use it 2-3 times a month, sometimes sits for 1-2 months. <br /><br />Pretty sure it just needs a new battery. It is a small and odd size that I haven't seen while searching. The battery has no model #, size #, or amp rating listed on it. It is 6x4" and 6" tall. Not sure what I should be buying to replace it. Thanks for the help.

 

[crab bait]

Re: Nissan 40 HP, what size battery is this?

i have the same motor.. i have a regular delco maintenance free wet cell car battery.. don't know the amps or crank power .. but this battery is way good for this motor.. i got it only because it fit within my space restrictions.. <br /><br /><br />get a real size battery ..an the one that will fit in your space..

 

[Richard Petersen]

Re: Nissan 40 HP, what size battery is this?

If you also have and use a trolling motor on the boat . Get a Deep Cycle battery and it will last much longer than a starting type battery.

 

[Silvertip]

Re: Nissan 40 HP, what size battery is this?

There is no mystery regarding battery size, other than getting one that has too little capacity. You can't have too much capacity. Get the largest battery size and cranking capacity that will fit in the available space. A dual purpose (starting/deep cycle) will be fine. If you don't use a trolling motor, a regular marine starting battery is sufficient.

 

[Paul Moir]

Re: Nissan 40 HP, what size battery is this?

The owner's manual recommends a 70AH (Amp-hour) battery or larger. AH is normally how deep-cycle batteries are rated. They do not mention cranking amps probably because it can't possibly matter.<br />But that is a *much larger* battery than what you've got. This would likely be what's called a "Group 24" battery, which measures a little less than 10x7x9. I would guess the capacity of the battery you have would be at best around 16AH.<br /><br />I'm a firm beliver in using deep cycle batteries for starting small outboards. AGM types are the very best for this. But you'll want to use a quality automatic electronic charger with them.

 

[surfstar]

Re: Nissan 40 HP, what size battery is this?

Thanks for the tips guys, I'm sure I've overcharged the battery by now (just left it on for a while at 6amps charge, thinking that the battery was over 100AH.) sounds like it was already done for. <br /><br />I'll just head to wally-world and find something that's not too big to keep the weight down. No trolling motors, so I guess something cheap will work fine. <br /><br />Would you recommend using a 1.5A trickle charger/battery maintainer to keep it topped up between uses, or just an overnight charge at 6amps before I take out the boat?

 

[Paul Moir]

Re: Nissan 40 HP, what size battery is this?

It's really up to you and what type of battery you get. If it's not "maintanance free" than overcharging isn't as big a deal, since you can just top the battery up with distilled water periodically (once or twice a season). So with that you can blast away with the 6 amp charger.<br />Trickle chargers can be as bad or worse than the regular charger, unless they're of the variety that shut off when the battery is fully charged. Those are commonly called a "Maintainer" & work great.<br />The king is the fully automatic charger. These charge the battery up exactly like they like it and shut off when they're done. Good ones will allow you to select normal, gell cell, or AGM charging profiles. Chief drawback is expense, naturally.<br /><br />The car batteries will be significantly cheaper than deep cycles. Probably about 40% less. If you can keep it charged up and try not to discharge it too much it will last a lot longer. The deep cycle batteries are much more tolerant of being discharged than a car battery (though they don't like it either). Try to find a battery that has removable caps so you can add water. <br /><br />I don't know why Nissan wants such a large battery when you would think a motorcycle size battery would do fine. Perhaps it's just to lessen damage to the battery caused by the outboard overcharging it. But that's only a guess.<br /><br />Good luck!