My Bravo 1 seems to sag over 3 days. I Trim it up fully then over the next 3 days it gradually drops ? There are no leaks or loss of fluid. It seems to be working ok .
Can anybody point me where to start .

THX

I would think the rams are going. I have a similar situation with the hatch ram. No leaks, but I know its the ram not holding as its the original from 89.

Make sure the manual release screw on the trim pump is tight and maybe even pull the screw and check the o-rings. 5 minutes and 2-3 o-rings are cheaper than new rams, so that's where I'd start.

Valve in the trim pump motor is leaking.

Also out of curiosity why are you leaving it trimmed all the way up for days? That's not real good on the bellows and what not.