I'm guessing you mean X642 by octura. This is high lift prop, coupled with the fact that your motor is high out of the water you will spin out and flip alot. The spinning out is because you don't have much rudder in the water when you turn the rudder acts like a turn fin the boat rides the rudder and then looses grip. Not sure how the other guys are running high motor position, mine is 1/8 from bottom. X6 Series props are high lift most people run X4 series props as they are medium lift. With a 2 blade prop you need to go deep to make it handle easy, if you want to lift the motor a little and get much better grip go to the X440/3 blade prop. I'm running it in a medium low position and it runs great no issues.