2026 Harris Grand Mariner 250

The 2026 Harris Grand Mariner 250 is a 25-foot pontoon powered by a single Mercury 400 hp engine. Built for open-water cruising, it combines straightforward performance with comfortable accommodations for entertaining groups on the water.

The boat features spacious seating throughout the deck with premium finishes and amenities designed for relaxation and socializing. The layout makes efficient use of the 8.5-foot beam to maximize usable space for passengers and gear.

Powered by a Mercury V10 engine, the Grand Mariner 250 delivers solid acceleration and responsive handling. The single-engine setup keeps maintenance straightforward while providing the power needed for family outings and group entertaining.