My 2007 CX183 Champion with 150 Optimax and Tempest 23p steering is stiff. This is my first boat with hydraulic steering and has been hard to steer since I bought it in April. It steers fine at idle but when I get on plane it takes both hands and hard pulling to turn in either direction. I have raised and lowered the motor and it doesn't seem to change. (currently set at about 4" ptp) Top speed with partner is about 53 mph, but I do have it loaded down with tackle. I have checked the fluid on the console and it is full. Any help would be appreciated.