A review of one of the Biggest Used Pontoon Boats you can buy. The Sun Tracker Party Hut 30. It is very similar to the Party Cruiser. Some newer Tritoons may be almost as big, but there aren't many available that are bigger. This one is equipped with the Mercruiser 3.0 135 hp and an alpha 1 outdrive. The top speed is up to 24 mph unloaded and about 18 mph with 8 people on board.