Hustler Fastrak Not Starting (Video)

My Hustler suddenly wouldn't start a couple of days ago. I researched the possible problem online before joining this site and found one video on YouTube that someone else posted and shows EXACTLY what my mower is doing. It was left out in the rain a few days ago, but that's happened once or twice before the past few years with no problems. Below is the video I found which matches my problem....

https://www.youtube.com/watch?v=i7ESUdmcun0

Any help is appreciated. I've checked the battery and it's fine. Just doesn't sound like it's trying to turn over at all. Just the spinning/whine sound.

Thanks,

imatexan

Hustler Fastrak Not Starting (Video)