Zero Turn Mowers

I don't work for Husqvarna just want make that clear first.

You got look at this way too. All of the shops out there have quite a bit overhead. Even my small independent shop has overhead and tech training isn't cheap either if we want confident technicians and not just parts changer. Our tools and test equipment is usually expensive if we purchase equipment that will last more than a few tests. Personally I spent two years in electronics schools and 30 yrs of on the job training as there is always something new to learn.

Parts changers is why I get so much messed up equipment in my shop that I got undo what they did just to get to the real problem. I repaired one John Deere ZTR mower this year that was having false loss of oil pressure problem that the local JD dealer tech said the engine didn't even have an oil pump when clearly had one when I looked the engine's IPL.

I am also fairly sure you don't work for free either. You can try to live on a couple thousand dollars of net profit for a year. That is exactly my current net profit for this year is plus I still got income taxes to pay at the end of the year and I have not even drawn a paycheck in two years. I am having to depend on government support just to make it right now. At least I make enough to pay the shop bills and buy new additional tools I need to increase my shop's gross income and hopefully turn a profit in the future.

You probably thinking that I should just quit well that is the Catch 22. I am have tried to find work and the companies will not even except my years of experience. Even when I first got unemployed the state unemployment wanted more than 2 jobs references even I had spend 16 years working for two companies. I ended up having to a lawyer involved just to collect my unemployment insurance.

Now with that said off to your problem...

There are few things that can be happening. Things like overcharging and not charging at all. If you have recently jump started the mower it is possible you fried the voltage regulator or alternator if not both. It only takes an instant of reverse connection of the jumper source battery do it. It takes someone very familiar electrical charging circuits to determine the exact cause of the problem.

Now for a battery not accepting after it is fully discharge can even be the charger fault. This I have seen with my own eyes. It primarily because a fully discharged battery present a very high impedance (resistance) to the chargers due plates being oxided. I have recharge several that where supposedly not rechargeable using pure DC current from my solar cells. Many electronic auto shut off chargers simply don't work properly as they see the a normal standing voltage from the battery because of the high impedance. Most times I end up falling back on my 40 year battery charger to do the job at hand.