2026 Mercury 4 HP 4MH Outboard Motor

This new 2026 Mercury 4 HP 4MH outboard is a compact, single-cylinder portable built for small fishing boats, small inflatables, and sailboat auxiliary power. It carries a short 15-inch shaft, manual start, and tiller steering, weighing in at 55.0 lbs.

Built around portability

An internal fuel tank keeps the whole unit self-contained for carrying to and from a dock, while an external fuel-line connector lets you add a remote tank when you want more range. A built-in carry handle makes moving the engine between boat and vehicle straightforward.

Construction and running gear

Saltwater-ready details run through the whole design: a stainless water pump housing, zinc-coated water passages, and sacrificial anodes guard against corrosion, wrapped in marine-grade alloy castings. Underneath, CDI ignition with spark advance drives a 2.15:1 gearset, shifting forward-neutral-reverse from a lever mounted up front for easy reach.

Does it include a propeller? Yes, this one comes with a 3-blade aluminum prop already fitted.

What's the warranty on this engine? Mercury Marine's 3-year warranty.

Being sold new and manufactured in Japan, this motor arrives with an owner's manual, a tool kit, and Mercury 4-stroke oil, ready to mount and run. First-time buyers of a small portable like this should budget a few extra minutes for break-in before loading it down with a full fuel tank.

Specifications