Playing middle pp too weak?

[kekedarius]

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Hand History Converter Tool (http://poker-tools.flopturnriver.com/Hand-Converter.php) from FlopTurnRiver.com (http://www.flopturnriver.com) (Format: 2+2 Forums)

UTG ($30.05)
MP ($49.45)
Button ($25.50)
SB ($27.30)
Hero ($27.90)

Preflop: Hero is BB with 8/images/graemlins/heart.gif, 8/images/graemlins/club.gif.
UTG calls $0.25, MP calls $0.25, Button calls $0.25, SB completes, <font color="#CC3333">Hero raises to $2</font>, UTG folds, MP calls $1.75, Button folds, SB calls $1.75.

Flop: ($6.50) Q/images/graemlins/heart.gif, 7/images/graemlins/heart.gif, 4/images/graemlins/spade.gif <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $6</font>, MP calls $6, SB folds.

Turn: ($18.50) 2/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
Hero checks, MP checks.

River: ($18.50) 9/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
Hero checks, MP checks.

Final Pot: $18.50

Villain is 45/0/2. Should I be betting this river? I'm thinking he has a weak queen, but I'm really confused as to how he played the entire hand.

[munkey]

I play it the same.
If you bet what will he call with?

Being OOP too if you thought he had a fdraw and got called on the turn you would have to check the river OOP and potentially call a bet from a busted draw -but could be a Qx.

He could have all types given his vpip and the little betting - 7x or 4x or a fdraw or weak Q if he connected else ATC.