I have a 1990 40hp Johnson outboard with manual tilt (no power trim/tilt). Tried to use it for the first time this year, and it won't tilt up. I left it in the down position all winter, and now when I move the lever to lift it it won't unlock. The lever moves freely, and it appears that the cable it's attached to is moving, but when I try to lift the engine, it feels like I still have it in the lock position. Also, there's a torx screw at the bottom of the tilt assist cylinder. Is that the release screw? Any suggestions would be appreciated.