2025 Harris Grand Mariner 250

The 2025 Harris Grand Mariner 250 is a 25-foot tritoon powered by a Mercury Verado V10 400-horsepower engine with power-assisted steering, digital throttle and shift, and automatic trim. The boat features three 27-inch aluminum pontoons with full extruded "M" bracket construction welded to the frame, 0.090-gauge tube stock, large lifting strakes, and reinforced nose cone. The all-aluminum transom engine mounts and stainless steel rivets support the drivetrain. A 50-gallon fuel tank provides fuel capacity, and the boat handles and steers with precision through its advanced hydraulic systems.

The layout includes an SL single-lounger floor plan with a raised helm position and UltraLux high-back captain's seating. The helm features dual Simrad 9-inch color screens with Mercury SmartCraft vessel view, chartplotter, and depth finder integration. An ION tower with JL Audio speakers stands above the bow, complemented by a comprehensive sound system with eight lighted speakers, two subwoofers, amplifiers, and tower speakers with additional amp. Stainless steel cup holders with integrated lighting, a black acrylic table, and gray wood woven teak flooring complete the helm area.

Amenities throughout include dual AGM glass mat batteries with switch and charger, wireless phone charging, CZone LED RGB lighting in the arch and at seat bases with under-deck and underwater illumination, and USB and USB-C outlets. The boat is outfitted with an integrated mooring cover, stainless steel ski tow bar, fold-down swim seat, extra-wide stainless steel swim ladder, and docking lights with LED flood and spot functions. The convenience package adds portable cupholders, upgraded steering wheel, four quick-release 8.8-inch fender mounts, flip-up cleats, and cooler bag.