leak in steering

[ztagator]

I have a hynotic steering on my 1979 20' SuperFisherman and a month ago I noticed a little fluid behind the wheel on the fill screw. The screw seems to not be the right fit, so I filled with fluid and put a tighter screw in. The next time out, fluid was coming from under or behind console. It was not alot so I figured I overfilled it. My third time out since, the steering seems hard. Any help would be greatly appreciated.