Well tryed a different prop nothing good to report.My buddy let me try his spare for his motor.Its a 13 1/2 21p aluminum, it felt good out the hole but as soon as it started to plan it blew out, over reved the motor, and fell down in the water.There is one other thing his motor is a 120 Force mine is a 150 merc his gear case is smaller than mine is this why it would't get on plan.Thanks,Joe 