There wasn't any air in the system when he brought it in. The jam nut had backed off quite a bit and after tightening it was it was pretty solid. Must have a check valve going bad in helm.
Junky call me or John 972-771-4442.
That's what I was thinking.
Had it happen to me.
Took the helm apart and cleaned it up.
All it takes is a tiny piece of crud to prevent the check valve from sealing on one side and the boat constantly turns that direction.
Air tends to slow steering response (mushy) both directions.