Common Situation: You raise PF, UTG calls, UTG leads flop

[johnnycakes]

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $2/$4
5 players
Converter

Stack sizes:
UTG: $380
Hero: $349.20
Button: $424.20
SB: $765.80
BB: $790.90

Pre-flop: (5 players) Hero is CO with 6[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/club.gif[/img]
UTG calls, <font color="#cc0000">Hero raises to $18</font>, 2 folds, BB calls, UTG calls.

Flop: J[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/spade.gif[/img] ($56, 3 players)
BB checks, <font color="#cc0000">UTG bets $56</font>

UTG is running 35/12 donkish.
Just let this go?

I think he's most often got crap like JT, JQ, JK here.
Can I push him off it?

How about if I raise to ~$170? If he folds, great. If he calls, I can check behind on the turn. Spew?