Is there a voltage regulator on a Husqvarna LOGTH2448T?

Yes you here a link to a source for current replacement.

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I'd put a surge suppressor and voltage regulator ahead of your machine from now on... because I think you've probably got another fried board. With luck, though, it just needs reseating.

the best way to put it on is to look up a schematic on how the belt goes on these models are very trouble some .. you will find a pdf on line if you put your model # in

check the wires they rub on sharp edges

It sounds like a voltage regulator.
The PTO/ mower deck is run off of the battery, the regulator should be putting out more voltage when the deck is running. It sounds like it isnt.

The regulator should be mounted on the engine, probably has 2 or 3 wires coming out, yellow, red, etc.
They usually run about 45.00

The mower stopping with the battery disconnected is normal as the fuel shut off solenoid will lose the voltage required to remain open. Check the battery voltage with the mower not running then check it with the mower running. The voltage should be around 13 to 14 volts with the latter. If not the regulator or the wiring from it is faulty. Regards Phil

You can check inside the power supply unit for a fuse, but I think he probably blew a voltage regulator and the power supply will need to be replaced. Contact an authorized Husqvarna Viking repair center.

Yes SAE 30 is the recommended oil for B & S engines. You can find it on amazon for good price. here: Amazon com oil 30w . Hope this was helpful. cheers

When the tractor has not been run for a hour or so use a meter and check the battery voltage. Then start the machine and check the battery voltage. The voltage should be higher when running. Normally 12.5 to 14vdc. Any higher then your voltage regulator in not working and your cooking your battery. Lower and the charging system is not working. If it has a dedicated alternator then it or it's voltage regulator is bad. Usually the voltage regulator is built in to the alternator and can't be changed by itself. Check your parts manual if one is listed by itself.