50NL :QK OOP v donk

[aka_bebel]

$0.25/$0.5 No Limit Holdem
5 players
Converted at weaktight.com

Stacks:
UTG (<font color="#0000cc">$10.54</font>)
Hero (<font color="#0000cc">$184.77</font>)
BTN (<font color="#0000cc">$41.90</font>)
SB (<font color="#0000cc">$50.65</font>)
BB (<font color="#0000cc">$45.25</font>)

Pre-flop: ($0.75, 5 players) Hero is CO K[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/club.gif[/img]
<font color="#777777">1 fold</font>, <font color="#cc0000">Hero raises to $1.75</font>, BTN calls $1.75, <font color="#777777">2 folds</font>

Flop: Q[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/heart.gif[/img] ($4.25, 2 players)
<font color="#cc0000">Hero bets $3.4</font>, BTN calls $3.4

Turn: 7[img]/images/graemlins/diamond.gif[/img] ($11.05, 2 players)
Hero ??

BTN was a donkey: 65/10/2 50
He has floated me on a few flops and called bets with medium hands.

So...should we bet here or let him take a stab ?
BET/FOLD ?
He doesn't have a full stack here