Nitro Seat Post problem

I have a Nitro Bass Boat and the seat post on the front & Back are very hard to get out.I took the front one out when I bought the boat 2.5 yrs. ago once and had to beat it back in.

Has anyone had this problem?? Would sure like to fix this problem so I can get a double seat mount when I want another person sitting up front fishing besides me.Any help will be appreciated.

Charles

If it has a 3/4 inch pin make sure the pin is clean and free of rust, corosion, and the base, clean with fine sand paper then spray with wd40 or a silicone type spray.