Mercury 115EXLPT SeaPro Commercial

Built on a 25-inch shaft with a 2.38:1 gearcase ratio, this used Mercury 115EXLPT SeaPro Commercial is the extra-long-shaft version of Mercury's duty-rated 115 hp four-stroke, aimed at continuous commercial use rather than weekend recreation.

What duty-rated tuning buys you

Trading some top-end rpm for low-speed pulling power and sustained-duty durability is the point of the SeaPro lineup, which suits guide boats, ferries, and other work craft that run for hours at a time rather than short recreational outings; full throttle on this engine sits at 5000-5500 rpm. CARB star rating is 3, and the shallow water trim range runs 20 degrees.

Controls and equipment

Big Tiller compatibility, dual mechanical steering cables, an electro-hydraulic option for dual installs, and hydraulic power steering round out the control choices here; match these against whatever is already on your boat before ordering. Power comes from a 2.1-liter, 8-valve inline four with a single overhead cam and multi-port EFI, electric-start via Smart Start. The gearcase is standard rather than Command Thrust, dry weight comes in at 364 pounds, and this Phantom Black-finished unit ships without a propeller.

What is the shaft length? 25 inches, for a taller transom than the standard-shaft SeaPro Commercial sold elsewhere in this fleet. Is this engine rated for commercial use? Yes.