5hp Propane

Reliability, Portability, and Power

Mercury’s 5hp FourStroke Propane outboard provides more convenience and less hassle. Now you can power your boat with the same propane used for your grill and eliminate the need to haul gasoline. The 5hp FourStroke Propane outboard with a large 123cc displacement offers best-in-class power by delivering a true 5hp.

Engine Information and Specifications

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5 Propane 5 Propane Sail Power

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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

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Engine Details

Mercury’s all-new 5hp FourStroke Propane outboard provides more convenience and less hassle. Sail Power model is designed for sailboats and features an alternator and more thrust. Ideal for sailboats, but also a good fit for aluminum tiller, inflatable or jon / utility boats.

Specifications - 5 Propane Sail Power

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)
Alternator amp / Watt	4 amp / 50 watt lighting and charging
Recommended oil	Mercury FourStroke Oil 10W-30
Engine protection operator warning system	Low oil pressure Over-rev
Starting	Manual
Steering	Tiller
Shaft length	20" / 508 mm 25" / 635 mm
Gearcase ratio	2.15:1
Dry weight *Lightest model available	63.1 lbs / 28.6 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	Sail Power
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

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Delivering a clean-burning, powerful and easy-to-operate portable outboard

Starting at just 59.5 pounds (27.2 kilograms) the 5hp Propane FourStroke is light and easy to carry or transport. You can run it on the same conventional propane you’re probably using in your backyard grill, so there’s no gasoline to haul with the engine.

Owners Manuals

Need an Owner’s Manual for your Mercury engine to perform maintenance, replace parts or just learn more about your engine? Mercury has made it easy for you to purchase a printed copy or to download and print your own copy. To order a printed version of the Service Manual for your particular Mercury Outboard or MerCruiser Engine, click here.

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