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opinions on charge regulation, 13 HP B&S

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Simen:
I got a lawn mower rider (Jonsered JICTH13A) which has an unregulated 3 A charge output.

The coil inside the flywheel has one end connected to chassis, and the other end are connected to the battery, via a single diode.
The Open AC Voltage are rated to 28 V @ 3600 rpm.

I use the rider for around 2 hours, 1-2 times a week from early spring to late autumn, and at the end of the season, the (new in spring) battery are usually more or less shot. (The battery are a 12 V, 20 Ah LA)

I do have a regulator from another rider, but it has 2 AC inputs and a positive output, with negative on chassis. I could open the flywheel and disconnect the other end of the coil from chassis, and connect it to the regulator.

Or is there an easier way? :)

MagnetJuice:
I think this is the Schematic Diagram for that Mower

MagnetJuice:
Here is a better image

joestue:
just get a used car battery for $5 from someone and use it instead of a new sealed lead acid.


old car batteries may be able to rejuvinated if you dump the electrolyte out and fill it with water, connect to a float charger at 13.8 volts or more for a month or two, and see if the water rises to say 1.2 specific gravity. if so, dump that out and put the original electrolyte back in. boil down the 1.2 SG electrolyte until its say, 1.5  and add it back to the battery as needed to get normal acid concentration.

MattM:
I've always wondered if the tractor battery could be drained for storage.

When they sit they die over winter.  Actually had one make it 2.5 years, but most die in a year.

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