Cryptologic
Pot Limit Omaha Ring game
Blinds: $0.50/$1
9 players
Converter

Stack sizes:
UTG: $56.50
UTG+1: $273.50
MP1: $147.75
MP2: $20.50
Hero: $106
CO: $167.61
Button: $71.50
SB: $79.50
BB: $50

Pre-flop: (9 players) Hero is MP3 with 9 K 4 K
UTG calls, 2 folds, MP2 raises to $4.5, Hero calls, CO calls, Button calls, 2 folds, UTG calls.

Flop: J 4 6 ($24, 5 players)
UTG checks, MP2 checks, Hero checks, CO checks, Button checks.

Turn: 7 ($24, 5 players)
UTG bets $2, MP2 folds, Hero raises to $21

Is preflop loose?

Should i lead flop?

Is raising turn standard?

Preflop is fairly loose, but I don't hate it.

Bet the flop.

I prefer a slighly smaller raise on the turn. Make it ~$15. You make more when you are ahead generally. He probably has a lower flush or the straight.

Me too. The two words I want to use here are POT & CONTROL. Playing it the way you did, you're getting stacked by the ace high flush, and folding out anything that you beat. Being in position here, either just flat call the turn and see what he does on the river, or put in a ~10-15 raise and go from there. What's your move if he re-ups your big $21 raise?

Fold. I guess this is why 21$ sucks

That's the problem with K high flushes. A naked A will often run a bluff at this on the turn knowing you don't have the nuts. I honestly lean towards just a flat call here and wait and see what happens on the river. Naked A might run a bluff there, which you can call and show down the hand for the same price as raising it on the turn, whereas like you say if he runs the same bluff on the turn, you're probably folding. I'm very suspicious of the size of his turn bet. Who bets $2 in to a $24 pot?