MERCURY SEAPRO 250 HP L When people are counting on you to get the job done, you can count on SeaPro four-stroke engines. They've earned their reputation for reliability by performing under the toughest working conditions to deliver years of trouble-free operation. More of Everything: Mercury's commercial grade engines deliver more displacement, more power, more efficiency, and more durability. Commercial Calibration: Calibrated to meet commercial duty cycles, delivering more power with less engine stress. Unmatched Corrosion Resistance: It starts with superior aluminum alloys and coatings, plus four serviceable anodes, including one in the cylinder block. All to deliver an engine that works as hard as you do. Less weight means more efficiency - and SeaPro four-stroke outboards deliver. Case in point: The 200hp SeaPro is the lightest engine in its class. Reduced Fuel Cost: Advanced Range Optimization (ARO) and closed-loop fuel control work together to precisely adjust the fuel mixture for optimal fuel economy. Durable, Efficient Power: Lightweight, durable materials and fewer moving parts make the SeaPro compact, durable, and highly efficient. Less weight also helps you take full advantage of your engine's torque.