Have a 1990 Mercury 175 with a design 1 trim and tilt unit - has been a battle due to release valve being seized and actually deteriorated ( probably original as in black plastic if anyone remembers) - motor was dead and replaced it and pump changing to a 2 wire vice 3 - got a new stainless relief valve but getting it in completely after first carefully drill out didn't work leaks - tried again and now it's completely in but haven't tested it yet and odds are due to drill out it still won't work. So I have a new stainless valve and a brand new motor and pump that works - so anybody knows of anyone that might have a working unit without the pump and/or reservoir - don't even need the tilt ram or either pin - only been able to find used units complete $400 - or new/refurbished $900 or an off er to rebuild mine for prob $1100. So any leads on a unit without the motor etc appreciated.