How many Amps is the Stator in a Mecury 115 4 Stroke EFI

[AustinTxPontoon]

They told me I have a stator in my Mecury 115 4 Stroke EFI and wanted to know the amp output...I am adding a soundstream 100x4 watts and usind a 4 ga power wires etc...will I have enough power with this stator to power this, I assume amp could draw in the 25 range, I wanted to add a second amp and put subs in guess thats out now....I also want to run stereo with boat off floating for long periods 2hr range also will i need multple batteries? Or will the charging system never keep up to charge things back? New to outboards soory if these questions are stupid

 

[AustinTxPontoon]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

Oh the motor is a 2005

 

[Silvertip]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

your engine has a 25 amp alternator (stator) system. That means at wide open throttle it delivers a maximum of 25 amps. So to put this in perspective, if your sound system does indeed draw 25 amps and you ran it for an hour, the motor would have to run wide open for an hour to put that amount of power back into the battery. Remember, the alternator doesn't power your electronics -- the battery does. The alternator replaces the power consumed from the battery. So back to your question. You definitely need a separate, and large capacity deep cycle battery, to power this sound system. You also need either a battery switch, isolator or combiner to allow the engine to charge the deep cycle while preventing the starting battery from going dead which it would in less than two hours with a 25 amp load. Lastly, why on earth do you need all that power on a boat? Sound carries like crazy on the water and you will definitely draw the wrath of cabin owners and other boaters unless you are a very large body of water or out in blue water.

 

[AustinTxPontoon]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

Oh good 25amps I can live with I think ....I can just run extra batteries....I don't think I will be pushing that loud normaly ...lol ...I like the headroom for volume so nothing is straining and more in its sweet spot ...if that makes sense ....I will prob play it loudest when blasting around lake ...thanks for your help

 

[Silvertip]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

OK -- so you add extra batteries! How do you intend to charge them. Remember what I said about use and time? You will not top off one battery much less two or three of them in a 15 minute dash back to the dock. You also need an on-board charger with as many outputs that you have batteries. You then plug into shore power at the dock to keep those batteries topped off. If you don't, you can plan on frequent replacement of the deep cycles. Remember -- however long you run the sound system, that's theoretically how long you need to run the engine at WOT to get anywhere near a full charge on the battery.

 

[AustinTxPontoon]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

Hummmm and my slip has no electricity ...lol does anyone make a higher output charging stator system?

 

[Silvertip]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

My solution to the problem is to install one deep cyle and a battery switch or isolator. Then forget the high-power stereo. It is simply not needed on a boat. The engine charging system should be able to handle this system but it would be a good idea to fully charge the deep cycle periodically.

 

[AustinTxPontoon]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

Sigh..... your right, I will try it all with no amp, I will run two batteries so I can have start battery and run stereo and accessories off deep cycle ...do you recomend any type of battery isolator over another? Also if i want to just run accessories off other battery what do you usually have to do? Is it as easy as just pulling some wires off other battery and putting them on the deep cycle or will I have to trace wires etc?

 

[Silvertip]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

With a Perko (or similar) battery switch you turn a knob to select which batteries (1-BOTH-2) powers your accessories. BAT 1 is typically the START battery and BAT 2 is the ACC battery. Set the switch to BOTH and both batteries are on-line. The same works for charging while running. When set to BAT 1 ONLY BAT 1 charges. When set to BOTH, both batteries charge and when set to BAT 2 only BAT 2 charges. An Isolator will not let you run accessories from the start battery since the whole purpose of these devices and switches is to prevent you from being stranded by a dead start battery.

Here is how a simple battery switch is wired. Your fuse panel and accessories all get wired to the COM terminal on the switch. All cables in this diagram need to be the same size or larger than the battery cables from the engine.

 

[Chris1956]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

Austin, Most sterio (and other elec devices) have a max power consumed rating sticker. See if the stereo is really 25A. A 100Watts X4 sterio system could be a 10A power consumer, which is a different animal. You will still want a deep cycle house battery, but the motor should be able to keep it charged, provided you run it a bit.

 

[AustinTxPontoon]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

If I use a Perko switch do I use model #8603DP?... that looks like correct one...So I don't need anything else besides another battery and the extra cables and this switch right?

 

[Silvertip]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

No -- you need 8501DP which is a standard dual battery switch. The one you listed is for an I/O with an automotive style alternator. It is also much more expensive than the 8501DP which lists for $30 - $40 depending on where you buy. Yes -- all you need is the additional cables, the switch and the second battery (a deep cycle). The existing power feed going from the POS terminal on the battery to the fuse panel and the positive cable to the engine gets disconnected from the battery and connected to the COM terminal on the switch. Leave the bilge pump connected directly to the battery. Any other accessories that aren't powered from the fuse panel get connected to the COM terminal as well.

 

[AustinTxPontoon]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

Ok thanks so much ...if I have any more questions I will hollar...the switch seems pretty straight forward to hook up....

 

[Boatist]

Re: How many Amps is the Stator in a Mecury 115 4 Stroke EFI

If your talking 4 channel at 100 watts per channel then You need 34 amps to stay even if your amp is 100 percent effecient. Of course no amp is over 80 percent. I assume your would also want to charge your starting battery, be able to run the blower and pump the bilge. I also hope your never on the same lake where I am trying to enjoy the peice and quite. Of course I might enjoy it when the battery dies and your dead in the water.