Middle pair, ass end & BDFD . . . dump it?

[marchron]

Everyone here's your average garden-variety donk/fish, except UTG is prone to attempt LRR's with big hands from EP.

Ultimate Bet 3/6 Hold'em (9 handed) Ultimate Bet Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: marchron is BB with 4[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#666666">2 folds</font>, MP2 calls, <font color="#666666">3 folds</font>, SB completes, marchron checks.

Flop: (4 SB) 7[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, marchron checks, <font color="#CC3333">UTG bets</font>, MP2 calls, SB calls, marchron . . .

I don't have much, but I'm getting 7-1. Peel? And what's my plan for the turn if it's . . .

1) an 8?
2) a 3?
3) a [img]/images/graemlins/diamond.gif[/img]?
4) none of the above?