Yamaha F300NCB F300 300 hp 4.2L V6 Offshore Gray

This F300NCB powerhead is Yamaha's 300-hp, 4.2-liter V6 Offshore engine sold without integrated digital electric steering and without a lower unit, so plan to source a control box, cables, and propeller separately, since none of those ship with this listing.

What's included

No lower unit, control box, cables, or propeller ships with this motor; all are required and sold on their own, which makes this listing a better fit for a repower that reuses existing gear than a first-time rig. This is not the digital electric steering build; shaft lengths of 25 or 30 inches apply to it.

Key numbers

Compression is 10.3:1, and alternator output at wide-open throttle runs 50 to 70 amps. Induction is EFI, and the motor starts electrically with power trim and tilt built in, moving between -3 and +16 degrees. Lubrication uses a wet-sump design with oil capacity around 6.3 liters, and mounting centers on this block measure 28.5 inches. Full-throttle operation lands in the usual 5000-to-6000 rpm band for this displacement, and Yamaha's recommended fuel octane and filtration specs match the rest of the 4.2-liter V6 lineup.

Warranty runs a limited three years for pleasure and government use, one year for commercial use. Confirm your exact shaft length, lower unit, and control-box needs with us before ordering, and let us know if you're pairing this with a lower unit you already own.