2019 glastron 180 GTD, Yamaha 150HP Bimini Top Stereo System 2019 GLASTRON 180 GTD DECK BOAT Check out this 20 ft. 2019 Glastron 180 GTD Dek Boat for sale! Powered by a Yamaha 150HP 4 Stroke Outboard Motor, a Bimini Top, Stereo System, a Table, Snap on Carpet, and a Snap & Boat Cover. Rides on a Single Axle Trailer.