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2.5-20hp

Output far beyond its size

Put amazing power in the palm of your hand. These compact outboard motors take you to the fun, the fish or whatever floats your boat – quickly and reliably. Enjoy best-in-class acceleration to go with best-in-class speed. Easy to install and operate, with reliable starting, low vibration and instant throttle response. It's worry-free boating at its best.

mercury engine 2.5-20hp

Engine Information and Specifications

20 EFI 9.9 8 6 5 4 3.5 2.5
Engine Details Ultra-lightweight (just 99 pounds) and reliable, with little vibration. Innovative tiller lets you lock the tiller at 73 degrees – great for fishing and trailering. Perfect for aluminum tiller, inflatable soft hull, jon, utility, and sail boats. Built to deliver the type of power, thrust, and control that wider, heavier boats require. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats. Enhancements include simplified starting procedure, faster warmup, and better idle run quality. Lightweight: just 84 pounds. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats. Feature integral fuel tanks with an external fuel-shutoff valve. For extended range, they can also be connected to a remote fuel tank. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats. Multiple trim positions to enhance performance and enable shallow-water operation. Through-prop exhaust makes it extra quiet. Lightweight: just 57 pounds. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats. This lightweight motor features through-prop exhaust for extra-quiet operation. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats. Delivers lightweight, portable power and thrust for exact operation. Perfect for aluminum tiller, inflatable soft hull, jon, utility, and sail boats. Weighing in at just 38 pounds, this compact, reliable motor is a great choice for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.
HP / kW 20 / 14.7 9.9 / 7.3 8 / 5.9 6 / 4.4 5 / 3.7 4 / 2.9 3.5 / 2.6 2.5 / 1.9
Engine type Inline 2 Inline 2 Inline 2 1 cylinder 1 cylinder 1 cylinder 1 cylinder 1 cylinder
Displacement (L)
Full throttle RPM 5700 - 6200 5000-6000 5000-6000 5000-6000 4500-5500 4500-5500 5000-6000 4500-5500
Air induction
Fuel induction system Single Overhead Cam 2 valves per cylinder, single overhead cam (SOHC) 2 valves per cylinder, single overhead cam (SOHC) 2-valve pushrod (overhead valve) 2-valve pushrod (overhead valve) 2-valve pushrod (overhead valve) 2-valve pushrod (overhead valve) 2-valve pushrod (overhead valve)
Alternator amp / Watt 12/145 electric 6 amp / 76 watt 6 amp / 76 watt
Recommended fuel 87 octane / up to 10% ethanol 87 octane / up to 10% ethanol 87 octane / up to 10% ethanol 87 octane / up to 10% ethanol 87 octane / up to 10% ethanol 87 octane / up to 10% ethanol 87 octane / up to 10% ethanol 87 octane compatible (up to 10% ethanol)
Recommended oil 25W-40 Synthetic Blend Mercury FC-W 10W-30 4-Stroke Marine Oil Mercury FourStroke Oil 10W-30 Mercury FourStroke Oil 10W-30 Mercury FourStroke Oil 10W-30 Mercury FourStroke Oil 10W-30 Mercury FourStroke Oil 10W-30 Mercury FourStroke Oil 10W-30 Mercury FourStroke Oil 10W-30
Engine protection operator warning system Low oil pressure Over-rev Overheat Sensor failure Low oil pressure Over-rev Low oil pressure Over-rev Low oil pressure Over-rev Low oil pressure
Over-rev		 Low oil pressure Over-rev Over-rev Over-rev
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