A:AnswerPull the mount out and angle to one side. Their are 2 nuts in the center (see in lded photo). They come from the factory pretty tight. Loosen both (jist a little bit). You should be able to tilt it now.
A:AnswerIt comes with about 3” lag bolts for wood. You need to figure out what you can screw into with 16” center to center and either use the hardware it comes with or buy what will work.
A:AnswerI’m not sure you’ll get a full 90 with a 55” tv. Even if the tv is shifted to the furthest point on the rail it don’t think it’ll extend far enough. But if the tv has a small frame and is super lightweight it may be possible. I know it won’t go that far with a Samsung.
A:AnswerThis wall mount works for most 65" TVs up to 110 lbs. (50kg). Supports VESA patterns from 200 × 200 to 600 × 400 and all common sizes in between.