50 PLO- bottom fh on scary board

[stu-unger]

reads- villain seems decent, hes a little too loose and more on the passive side, but i havent seen him do anything way out of line.

50 plo (6 max)
effective stacks- 50
dealt to hero in bb K [img]/images/graemlins/club.gif[/img]K [img]/images/graemlins/spade.gif[/img]4 [img]/images/graemlins/diamond.gif[/img]4 [img]/images/graemlins/club.gif[/img]

preflop- limp to button who raises to 2.75, sb folds, i call, limper call.

flop (8.5)- 8 [img]/images/graemlins/spade.gif[/img]5 [img]/images/graemlins/heart.gif[/img]4 [img]/images/graemlins/spade.gif[/img]
hero checks???, utg pots, button folds, hero calls???

turn (25.5)- 2 [img]/images/graemlins/spade.gif[/img]
hero checks???, utg checks

river (25.5)- 8 [img]/images/graemlins/heart.gif[/img]
hero checks, utg pots, hero folds...

comments on all streets appreciated. im mainly concerned with flop and river, should i block river? i didnt because i felt like if i 1/2 potted it i would probably make a crying call if he shoved with the odds i would be getting. ps my plan for the river was to c/c <3/4 pot, is that ok???