Over on River- Daves , there's a thread from Teague about installing water pick-ups...

My boat has two steps there is roughly a 6" difference from the bottom of the first step to the pad. This is on a 25' bottom. My theory is the water is getting a lot of air in it. I'm seeing 28psi at over 90mph I don't think its all water air compresses and shows up as pressure. Not many know this but some boats have very elaborate water systems to get the air out of the water b4 it enters the motor to cool. Believe me I went through the ringer with this thing to try to keep it cool. Dual stage pump, two other pumps, hardwall hose, softwall hose, water hose in the transom assembly, t-bolt clamps, worm gear clamps, double clamps, 5200 on nipples then clamp the hose, rigger up a leak down tester, modified the low water pickup many many times, tried low water pickup in conjunction with transom pick, sea strainer, no sea strainer on and on and on. Believe me I don't give up to easy but I was starting to think about used motor oil and a propane torch to take care of the problem. I buried the new adjustable pick-up and bam. Problem solved. The other nice thing about having the pickup buried I don't have to ride with one tab down and one up to keep the boat level. Both tabs up she's dead level. You wanna talk about a fun ride without the tabs. Let's just say that's how I ended up breaking the cockpit...,

TTT for sonic 700