2025 Harris Grand Mariner 250

This 2025 Harris Grand Mariner 250 is a triple-tube performance pontoon powered by a Mercury 400L Verado V10 outboard. Built on Harris's triple-tube chassis with integrated ski tow bar, the boat combines responsive handling and stability with serious acceleration. It runs on a single 400 hp gasoline engine and measures 25 feet.

The interior showcases a flagship entertainment layout finished in Black Sapphire with White Diamond accents and Black Edition powder-coated fencing. Seating includes dual Ultra Lux high-back helm chairs and a chaise lounge flip-up table. The cabin features Cool Touch pillow-top upholstery in Chestnut Brown with Onyx accents, premium JL Audio Diamond stereo with amplifier and speakers, and C-Zone interior and exterior lighting. Additional appointments include an Ion power-lift wake tower with bimini, Beachwalk Seagrass flooring across the full deck, stainless steel auto-retract swim ladder, raised helm station, and in-floor storage.

The boat has accrued only 40 hours and spent its entire operating life in Michigan freshwater. A ceramic coating has been applied to interior and exterior surfaces, and the pontoon tubes are wrapped in black carbon print for durability and appearance. The engine carries an eight-year factory warranty.