Mercury 350CXXL Verado FourStroke

In Phantom Black, this used Mercury 350CXXL Verado FourStroke is a 350 hp counter-rotation inline-6 on the longer 30-inch shaft offered in this Verado line. Counter-rotation engines like this one are meant to run opposite a standard-rotation unit on a twin-engine boat, cancelling out steering pull between the two.

Why a 30-inch leg

This length suits a deeper transom than a shorter counter-rotation engine in the same family would allow; the shaft cannot be changed after purchase, so measure the boat first. Electro-hydraulic power steering is standard, keeping torque feedback out of the wheel, and the same advanced mid-section damps vibration regardless of shaft length.

Powerhead details

Forced induction drives this 2.6-liter inline-6 to a 5800-6400 rpm full-throttle ceiling, with air-cooled boost piping and electronic pressure management keeping output steady. Dry weight is 668 lbs, charging duty falls to a 70-amp alternator that is belt-driven, and digital throttle and shift is sold on its own.

Does it need a matching engine on the opposite side? Yes, pair this counter-rotation unit with a standard-rotation engine for twin installs.

What color is it? Phantom Black.

Fleet buyers replacing a pair of these should keep the counter-rotation and standard-rotation units on the same sides they occupied before, so steering feel does not shift.

Ask about this used engine's hours and upkeep history before you buy. In total, protection runs 5 years: 3 under Mercury's standard warranty and 2 added through Product Protection Gold.