2020 Mercury 4 HP 4MH Outboard Motor

Mercury's 4 HP 4MH outboard is a small, single-cylinder portable aimed at fishing boats, compact inflatables, and sailboat auxiliary duty, built on a short 15-inch shaft with manual start and tiller steering. It is new, weighs 55.0 lbs, and per its own spec sheet carries a model year of 2019.

Why it suits a small boat

With a built-in carry handle and a weight light enough for one person to lift on and off a transom without a hoist, this is an engine suited to short outings close to shore where its internal tank means there is nothing extra to mount.

Construction

Running gear starts with a 2.15:1 gearset and CDI ignition carrying spark advance, shifting forward-neutral-reverse through a lever mounted at the front of the leg. The water pump housing is stainless, with zinc-coated passages and sacrificial anodes protecting against saltwater corrosion inside marine-grade alloy castings.

Is a propeller included? Yes, a 3-blade aluminum propeller comes with it.

What warranty applies to this motor? Mercury Marine's 3-year warranty.

Confirm the model year with us before ordering, since the listing title and the spec sheet disagree on it; everything else about this short-shaft, manual-start 4 hp matches across both. Keep the internal tank topped off before longer outings, since there is no remote tank option built into this version.

Specifications