New to Golf Cart Restoration and Need Help!

[Dirtyray]

I recently aquired what I believe to be a 1974 gas powered harley golf cart. Not to sure but will post pics later to help id it.

I got it up and running but am having a few issues with it and could use some help.

The motor spins over slowly in reverse but spins over fine when in forward gear. What could be the some causes of that?

Then when I fill the gas tank up all the way and let it sit overnight the fuel drains out. From what I can tell it does not drain out of the gas tank but out of the carb. What might cause this?

Also I was wondering what would be the appropriate spark plug for this golf cart?

Any help would be great and I appreciate it very much!

Thanks again.