2025 Harris Grand Mariner 250

The 2025 Harris Grand Mariner 250 is a 28-foot aluminum pontoon powered by a single 350-horsepower Mercury engine. Built new with minimal engine hours, this boat combines straightforward performance with well-considered features for entertaining and recreation on the water.

The layout centers on a raised helm for visibility and control, paired with the SL/DH floorplan and full Moonlit Shoreline flooring throughout the deck. A four-step telescoping stern ladder provides easy water access, while mooring eyes at midship support secure docking. The 3-tube black rubrail kit adds structural durability and stability.

Standard equipment includes a JL Zone Control audio system with eight speakers, customizable C-Zone RGB lighting for cup holders and seats, and a hydraulic Verado power assist system for responsive steering. An 8.5-foot beam provides the spaciousness typical of the pontoon platform, making the boat well-suited for groups and varied on-water activities.