2026 Harris Grand Mariner 250

The 2026 Harris Grand Mariner 250 is a 25-foot pontoon built on a triple-tube hull designed for stability and handling. Powered by a single Mercury 350 hp Verado engine with digital throttle and shift controls plus power-assisted steering, it reaches a top speed of 36 mph and cruises at 21 mph. The boat features an electric power-lift tower with integrated bimini top, controllable by key fob.

The deck layout centers on comfort and functionality. Seating includes plush pillow-top vinyl throughout, raised Ultra-Lux helm seats for driver and co-pilot, and an aft sunpad with a reversible backrest that converts between lounger and upright positions. In-floor ski and gear storage integrates into the center tube. Full LED lighting wraps the interior and exterior. Under-seat compartments provide additional storage across the deck.

The helm station is elevated for clear sightlines and includes a C-Zone digital switching system to manage lights, pumps, and onboard systems. Optional dual Simrad NSX displays provide navigation, system monitoring, and engine telemetry. A premium JL Audio sound system with amplifier, subwoofer, and tower-mounted speakers rounds out the electronics package. Modern fencing completes the exterior styling.