Thinking about buying another boat. Has 48spl evinrude with gas assist trim. I also own another boat with same engine, but with power trim/tilt. Not at all familiar with gas assist & info online is sketchy at best. Anybody that can explain how this works would be helpful. When we tried to lift engine, no luck, as if we needed to push or pull a button or lever to release. How/what do I do or is is maybe frozen up. Since don't know what or how it works I am at a loss. Love the boat, love the engine. Stumped again....H..E..L..P!! please