power steering trouble

[Hooked on Kings]

This started last Sep. but at that time thought the power steering cap  had just popped off, after a day on the lake last year noticed power steering fluid in my bilge. Checked the pump, it was very low could hardly see any fluid, the cap was in place but was loose so filled with fluid. Never took the boat out again closed it up a week later. This year, first trip out yesterday, boat ran great trolled for 3 hours and then after pulling all lines in decided to open her up on the way back, about a mile or so. When I got her home pulled the cover and had p/s fluid in the dilge again, not sure where the fluid came from this time. I started the boat and ran it at the house, having my wife turn the steering wheel full in both directions. Did not see any fluid dripping or spaying anywhere,plenty on wet areas but nothing coming out. I thougnt it would be the high pressure hose but saw nothing. Has anyone had a similar experience, any help would be appreciated...... Thanks in advance.