The world’s first 5.3-liter four stroke outboard, the F350 provides unparalleled displacement and up to 45% more thrust than 250hp-class outboards. When it launched in 2007, its industry-rocking 60° DOHC, and 32-valve, 5.3-liter design redefined offshore power. It’s taken almost five years for the competition to even remotely catch up.