Yamaha 300HP | F300XA

The Yamaha F300XA puts 300 hp through a six-cylinder V6 four-stroke. It carries a 25-inch shaft, remote mechanical steering, and electric start, weighing 551 pounds with 4169cc of displacement, aimed at larger boats and fishing vessels that need sustained offshore output.

Engineering behind the power

A reinforced crankcase and a two-stage approach to fuel delivery are built into this engine to keep output smooth across the rev range, and the air intake path runs through an acoustically tuned silencer intended to cut down on operating noise at the helm. The V6 layout uses corrosion-resistant materials suited to sustained offshore duty.

Fitment and weight

Line this motor's 25-inch shaft up against your transom height, and double-check that remote mechanical steering hardware already reaches the stern; this is not a tiller motor. At 551 pounds, verify your transom's rated capacity before mounting.

Living with a big V6

A motor in this class benefits from a dealer-level diagnostic check at the recommended service intervals rather than owner guesswork, since the electronic systems involved are more involved to troubleshoot than a simple carbureted engine.

Common questions

What is the displacement? 4169cc across six cylinders.

Is this electric start? Yes, key-turn electric, and this motor is sold new with Yamaha's factory terms applying.

Can it push a heavier fishing boat? Six cylinders and this displacement put it in the range buyers reach for when a four-cylinder motor isn't quite enough for the load.