i have been having a problem with trim stay up so this winter i replaced the whole pump, my first problem was the check valve in the new pump kept leaking so i ordered a new pump and replaced the check valve, now trim stays up under power but i cant trim under power, it will trim when not on plane but when i plane out i cant adjust trim, it will go down but not up, no leaks anywhere , the pump i used was an aftermarket pump not a genuine vp pump, also before i changed the check valve on the new pump the trim worked perfectly except for the leak that made the trim drop slowly
