Max Throttle Hit 737

[Iberiaorbit]

737 needs to be braked till N1 reaches 40%, no more, then release brakes and push throtle. But since I got a penalty once for using the
parking brake at the end of a flight going at 12 knots I allways release before starting throtle.
You can start your engines with the passengers boarding the plane, before or after no matter, with your 737 and fsp does not penalty you.