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 quick acceleration to go with exhilarating speed. Easy to install and operate, with reliable starting, low vibration, and instant throttle response. It's worry-free boating at its best.
Engine Information and Specifications
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![5 Propane]()
Engine Details
Mercury’s all-new 5hp FourStroke Propane outboard provides more convenience and less hassle. With a large 123cc displacement, it offers best-in-class power by delivering a true 5 horsepower. Ideal for aluminum tiller, inflatable or jon / utility boats.Specifications - 5 Propane
HP / kW - 5 / 3.7
Engine type - 1 cylinder
Displacement (CID/CC) - 7.5 / 123
Full throttle RPM - 5000-6000
Fuel induction system - 2-valve pushrod (overhead valve)
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Low oil pressure
- Over-rev
Starting - Manual
Steering - Tiller
Shaft length - 15" / 381 mm
- 20" / 508 mm
Gearcase ratio - 2.15:1
Dry weight *Lightest model available - 59.5 lbs / 21.2 kg
CARB star rating - 3
Bore and stroke - 2.32 x 1.77" / 59 x 45 mm
Ignition - CDI w/electronic spark advance
Fuel system - Propane Mixer
Propane Tolerance - HD-5 (65% or greater propane)
Cooling system - Water-cooled with thermostat
Gear shift - F-N-R
Gearcase options - Standard
Trim positions - 6
Exhaust system - Through prop
Shallow water drive - Yes
Shallow water trim range (degrees) - 16
Integrated fuel tank (gal / L) - Not included
Remote fuel tank (optional) - Not included
Color - Phantom Black
SMALL OUTBOARDS ARE OF BIG IMPORTANCE
While high-horsepower models usually grab headlines in the world of outboard engines, it’s small outboards that make much of the boating world go around.
Announcing NEW Mercury 20hp & 15hp outboards
The ultimate boating experience comes standard. Mercury’s newest addition to its lineup of portable FourStroke outboard motors is designed and built to improve every aspect of your time on the water, from starting the engine to changing the oil and everything in between. Watch here.
Award-winning tiller handle
Mercury Marine's tiller handle assembly for the 15 and 20hp portable outboard motors won the 2018 award in the "Propulsion Parts" category at the annual International Boatbuilders' Exhibition & Conference (IBEX). This new tiller handle features several remarkable advancements to make the steering, shifting and throttle operation of portable outboards more intuitive, comfortable and responsive, and is the world's first portable outboard tiller that offers ambidextrous operation.
Reliability, Portability and Power with the convenience of Propane
Mercury’s all-new 5hp FourStroke Propane outboard provides more convenience and less hassle. With a large 123cc displacement, it offers best-in-class power by delivering a true 5 horsepower. Sail Power model is designed for sailboats, and features an alternator and more thrust.
FOURSTROKE TECHNOLOGY AND MERCURY
Always moving forward. With boater-driven innovations and technologies. Like the world's first multi-function tiller handle. And a total commitment to corrosion protection, utilizing hard-coat anodizing and a superior multi-step paint process. Mercury FourStroke engines have consistently set the bar for clean, quiet performance and low fuel consumption. Plus, no one has more models to fit your needs.