Hand against a maniac and I am becoming a calling station

[kapw7]

BB is a maniac. 65/59 over 100 hands. I have the best position and I actually made loads off him by just 3-betting him with any decent hand as the rest of the table were more or less tight and calling nearly any hand to SD. But this one is a more controversial hand. I was based more on reads than odds. Are odds of any use when you are HU against a maniac?

Party Poker 3/6 Hold'em (6 max, 5 handed) converter

Preflop: Hero is UTG with A[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, BB calls.

He can call with anything. But he raises with Ax (at least the number of times that I saw).

Flop: (4.33 SB) 9[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, BB calls.

He is capable of folding sometimes and I expect to get raised if he doesn't fold but he's only calling. I am pretty certain that he didn't catch any piece of the board or has a flush draw. Betting for info works here.

Turn: (3.16 BB) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, Hero calls.

There he is. I am not betting this as a standard. Maybe I lost my cool here but after he raises I have to call. I can put him on a big variety of hands but I am not going to comment before you post your thoughts.

River: (7.16 BB) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls.

Final Pot: 9.16 BB

Do you call the river? Fold the turn?