[US_GRANT]

Do you push your throttle beyond 100%, say to 101% or beyond? That will stall your engine every time in the YP-80. Since the sabre uses the P-80 FM ATM, this will happen to the sabre too. As for restart, you'll need to drop the nose, push the throttle to 80% and build up sufficient speed then restart. Altitude is critical for an air start.