Like all of our lower units and gearcases, our Mercury outboard replacement lower units come with a three year warranty. It is the number one selling aftermarket lower unit with the best warranty in the industry. These units arrive completely assembled and ready to install. They are shipped without gear lube and you may want to consider adding the anodes and install kits if you are missing the original fasteners.

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Mercury 205

Replaces most 3&4 Cylinder 2-Stroke 1987 and newer 70-125 HP Also replaces most 75-115 HP 4-Stroke below Serial #OT801000. This

Mercury 206

Replaces most Mercury 2.0, 2.4 and 2.5 4-3/4 Bullet Diameter

Mercury 216

Replaces Most Mercury 3.0L Lower Units 13 Splines 20,25, and 30 inch Shafts. If you have an 8 Spline drive

Mercury Counter Rotation 218

Replaces Most Mercury 3.0L Counter Rotation Lower Units Do not use for standard rotation 13 Splines 25 and 30 inch

Mercury Outboard 15 HP EFI

ENGINE DETAILS Low weight and awesome torque get your boat on plane quicker and provide best-in-class acceleration to complement best-in-class

Mercury Outboard 2.5 HP

ENGINE DETAILS Weighing in at just 38 pounds, this compact, reliable motor is a great choice for aluminum tiller, inflatable

Mercury Outboard 20 HP EFI

ENGINE DETAILS Ultra-lightweight (just 99 pounds) and reliable, with little vibration. Innovative tiller lets you lock the tiller at 73

Mercury Outboard 25 HP EFI

ENGINE DETAILS Delivers consistent, easy starting, crisp throttle response, increased fuel economy, and outstanding overall performance. Great for aluminum tiller,

Mercury Outboard 3.5 HP

ENGINE DETAILS Delivers lightweight, portable power and thrust for exact operation. Perfect for aluminum tiller, inflatable soft hull, jon, utility,