Jeff - Welcome to the forum. Since your questions pertain to IH-built Cubs, you can (and should) post in the main "IH Cub Cadet Forum" area, where you'll get more response. However, you will need to be a little more specific about what you've already checked.
The first thing you'll be told is to always check the FAQ's for answers. It's the best way to save yourself a lot of (mostly) good-natured "scolding."
Regarding the charging issue, you should start with the easiest, least expensive, and very common possible cause(s); check & clean ALL ground connections. If you go back into the archives on this site, you'll find a lot of previous posts on this issue and many are solved simply by providing good ground connections.
On the 782, make sure you have good fresh gas (another subject discussed at great length in the past). Also, make sure the fuel lines are open/not clogged, and the carb & jets are open.
There are a LOT of very knowledgeable people on this site (my own knowledge is very limited), so you'll be able to get your tractors going again. But, don't forget to check the FAQ's. Note: In the FAQ's at the top of this page, is a link to another set of FAQ's (Charlie's) with even more information. Good luck.