I have a 1976 Apollo, a 12S Dominator Pump with an A impeller and a wedge pointing nozzle down; a 454 drives the rig. I am new to jet boats and took this one out for the first time last Saturday. When the boat comes out of the hole it acts like it's spinning its "tires" if you give it full throttle. You have to ease into it and then you can nail it in order to not have the thing spin out. Is that a cavitation problem or is it considered blowout? What could be done to the boat in order to make the boat "hook" coming out of the hole. The motor is fairly strong and turns the pump 5600 rpm at full throttle. The boat also has a tendency to slightly change directions if you nail the throttle when doing around 40 mph. Is this normal or are there any fixes for that situation? Other than the two forementioned problems the boat runs great. There is no porposing or anything of that nature. The hull rides very level and seems to be doing everything it's supposed to do. Thanks a lot for any help or suggestions that are given.