We got a new rudder
When I bought my 1999 Hunter 380 new, it would pull hard to starboard if you left you hand off the wheel. The boat would go in a tight circle to the right. I was told it was prop walk so I bought a Max prop which everyone said would eliminate the problem. It didn't. When i put the Max prop on, I had an engineer measure my rudder and he ascertained that it was curved which would send my boat to the right. I contacted Hunter (It was a very new boat at the time) and they sent out a vice president (who only knew about power boats) and agreed that the boat was not right. Actually, when he let the wheel go, the boat swerved so fast, he fell over.Anyway, they sent me a new rudder which was better but still had some curve to it. I've since had it fared out and it doesn't bother me any more. Hunter rudders are made by a different company and they have had this problem from time to time.