Wotzit

Newbie lee, I’m a novice boater ,56y, a carpenter from 16, in need of a new project/life venture. So I’ve just returned from a 5 day road trip hunt, racking up 1500 miles touring our canals looking for a narrow boat. On our finale leg near Bath on the k&A I found her,may be ? she’s a 47 footer, but has a seized rudder problem, I’m quite handy but I’ve no idea ,they’ve said it’s the glan seal baring thingy, where the tiller meets the barge has popped out? Any advice is welcome. ?‍♂️