I have a stratos 285xl with a 150 Yamaha on the back, 2 stroke and no jackplate. Was running a yammy 23m prop on it before with some wear but still turning 5700 rpm. Ended up purchasing a 23p tempest brand new and the boat was acting weird, jumping around on the tachometer and feeling like it was missing. Wouldn’t even get to 5300 rpm. Any idea what the problem could be? I’m shocked because I thought a lot a people used this prop on this setup.