Mercury 4MH FourStroke Outboard Motor

This used Mercury 4MH FourStroke Outboard Motor is a single-cylinder, 57-pound portable built for inflatable and fishing boats, with a forward-mounted forward-neutral-reverse shift lever and a reverse lock that keeps the motor from popping up when shifted into reverse.

What this small outboard offers

The single cylinder displaces 7.5 cubic inches and reaches 4500 to 5000 rpm at full throttle, running quietly through a through-prop exhaust design rather than venting above the waterline. Light weight is the main selling point here: at 57 pounds, it mounts and comes off a transom bracket without much effort, which suits anyone who moves the motor between boats or stores it between trips rather than leaving it rigged all season. A low-oil-pressure warning system alerts the operator before damage occurs, adding a layer of protection that plenty of small outboards in this class skip entirely.

Common questions

Does the reverse lock need to be set by hand? No, it is automated, engaging on its own the moment the motor is shifted into reverse.

What warranty applies to a used unit like this? Mercury's factory-limited coverage carries forward with the motor: a three-year standard warranty plus a two-year Mercury Product Protection Gold plan, five years of coverage altogether.

Is this a good first outboard to learn on? Its size and single-cylinder simplicity make it an approachable motor for someone new to outboards, with fewer parts to understand than a larger multi-cylinder engine and less weight to wrestle onto a transom bracket.