I changed out the milky oil that I had...2 rides later its milky again, Seals?

I would check the hydraulic lines for cracks first.
If water is getting in, then you should see oil leaking out.
Have someone run them up and down while you watch...

Same thing happens to mine. I was wondering if water does not drip onto the pumps from the vents or the back of the engine hatch. I found that after cleaning out the reservoir you need to clean out the lines too. I disconnected the lines on the outside and moved the tab up and down with my hand a few times to pump the contaminated oil out of the lines.

Thanks Dave, Pat... I'll try both.

Dave - D.Syst.,
I hose out my bilge on a regular basis. Can't see how just dripping water would comtaminate a sealed system?...unless there's a problem like Pat said. Keep me informed on diagnosis (for future problems)
BASH