Can somebody help me? I

You must be doing something wrong, because many others follow the tutorial to the letter and don't fry the engines...Are you trying to start the engines with the start locks not set? Or are you leaving the condition levers in TAXI and trying to firewall the throttles with only 72%rpm set?One other possibility is that you haven't removed the start locks prior to taxi... leaving the condition levers in taxi, pull each power back into reverse VERY SLOWLY. Once the left hand lever is past the hashed mark on the gate, you can then pull the right lever EVER SO SLOWLY back... at some point you will here the "START LOCKS REMOVED" comment from the virtual FO... that gives you the full pitch range on takeoff...Though I believe you arer trying to start the engines with the locks not in place... the real world engines would shear...Andrew

ati_1909 (name?),This doesn't sound like a start latch issue to me. You'd not be able to go over about 20% RPM if the props were not on the latches, and the fact that you're getting to 49% is fairly telling.You may have a controller calibration issue. Try recalibrating your throttle controller. If that doesn't solve the problem, disconnect your throttle controller and see if the engines start. If they do, it's the controller, and you may have to recalibrate several times. (This is not related to the J41, it's a quirk of FSX.)If that doesn't fix your problem, please let us know, and include a description of how you're initializing the sim and how you get into the J41.