i remember when i broke my NH i spend a lot of time fishing it back coz it stall a lot but its part of the game.i started by closing it and make a 2.5 turn then make 1/8 turn each time toward leaning, i noticed the engine will run between 2.25 to 1.75 turn, so i'm just playing around with these turns... i also noticed the engine easily got flooded specially if it stall in the water, the tune pipe suck up water and so really hard to re-start i make sure i drained it and pour nitro over the cylinder just to wash out excess water before starting it.