I know this has been discussed here before but my search feature on here isn't working. My center Bravo outdrive trims fine at the dock, pump motor sounds fine, no leaks anywhere, motor is cool to touch. Valve body? Rebuild kit? Schematic?

on mine, the trim limit switch wiring was shorting out in the water. disconnect inside to test.
If pump has been disconnected recently check hose and wiring for correct orientation

rebuild kits are hard to find, BAM has a good deal on new pump if all else fails

It doesn't have limit switches. It works great at the dock or idling, just doesn't build pressure under a load.

If the pump has not been disconnected since the last time it worked ok then you need a new pump, it is possible to reverse hyd lines and wiring, pump only makes high pressure in one direction