2026 Harris Grand Mariner 250

The 2026 Harris Grand Mariner 250 is a 25-foot tritoon built for both comfort and watersports performance. Power comes from a Mercury 350 hp Verado outboard with digital throttle and shift controls and power-assisted steering, delivering a top speed of 40 mph and a cruising speed of 23 mph. The triple-pontoon hull design provides stability and handling across a range of water conditions.

The boat features an electric power lift ion tower with an integrated black bimini top, controlled by key fob. The swim platform includes a telescoping stainless steel boarding ladder. A center-tube ski locker provides storage for watersports gear. Exterior and interior LED lighting packages create ambient lighting for evening use. The fiberglass bow and fence styling define the Grand Mariner's visual presence.

Interior seating centers on the single-stern-lounger (SLDH) layout with dual ultra-lux high-back helm seats at the raised helm station for commanding visibility. The aft area includes a versatile sunpad with a reversible backrest that functions as a multi-position lounger. Seating throughout features pillowtop construction with premium soft-touch vinyl and multi-density foam. Storage compartments run beneath all seat bases.

The helm integrates dual Simrad NSX displays for navigation, engine diagnostics, and digital switching via C-Zone controls. A JL Audio Diamond stereo system with amplifier, subwoofer, and tower speakers delivers full-range sound quality.