A few weeks ago , I too went out for a high speed run. At 80+ I felt my steering getting real stiff. ( Full Hydraulic) I also started smelling oil . Backed off the throttle and set her down. It stayed straight. Opened the hatch and had a bad oil leak at the back of the engine. Limped back to the dock with no steering. Burning up the power steering pump. Turns out that I had ruptured the low pressure side hose of my power steering right near where it attaches to the cooler. The hose had a slice in it like it had been cut with a knife. There is nothing around it to cut it. I figured I must have scraped the hose on the back edge of the boat when installing the engine. Ran it all last year like that not knowing. Put a very thick walled hose on now and a new pump and it runs great. I just consider myself very lucky it blew when it did. There were other times that it could have been very bad. I too check everything I can everytime I go out. Now I'm even more thorough, and pay extra attention to the steering.