2026 Harris Grand Mariner 250

The 2026 Harris Grand Mariner 250 is a 25-foot pontoon built on a heavy-duty triple-tube chassis with 27-inch diameter pontoons. Powered by a Mercury 425 hp V10 Verado outboard with Digital Throttle & Shift and Power Assist Steering, the boat delivers high-speed capability with structural reinforcement including lifting strakes and a full-length keel for stability and tracking. The large-diameter tubes provide increased weight capacity and a level ride in rough water. A stainless steel ski tow bar is integrated for water sports towing.

The exterior features a Black Sapphire and Black Matte color scheme with a powder-coated Black Edition fence. An electrically actuated Ion Power Lift Tower lowers at the push of a button for bridge or garage clearance and includes integrated tower speakers. A double Bimini system provides full deck shade coverage, while the aft section includes a swim seat and two 8.8-inch fenders with straps for docking.

Below, the layout centers on a Single Rear-Facing Lounger finished in Chestnut Brown upholstery with Onyx accents and backed by full Chestnut Teak flooring. Multiple seating zones feature a Woodgrain Luxury Sport Table, an upgraded Black Acrylic Table, and a Chaise End Flip-Up Table for dining and socializing. The helm sits on a raised platform with an ultra luxury high-back captain's chair and includes a removable windscreen, steering wheel upgrade, and wide-angle rearview mirror.

The helm integrates a Total Lighting Package with C-Zone digital switching for RGB interior and exterior lighting control, along with high-definition touchscreen displays and integrated GPS. Safety features include a stainless steel perimeter railing at the stern for secure passenger access to the aft lounger while underway.