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Mercury 4HP FourStroke


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This lightweight motor features through-prop exhaust for extra-quiet operation. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.

 

 

$1,580.00 $1,795.00

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Mercury 4HP FourStroke

Compact Power for Lightweight Boats

The Mercury 4HP FourStroke outboard engine delivers dependable and efficient propulsion for a wide range of small‑boat applications. Designed for tenders, dinghies, inflatables, canoes, and small aluminium boats, this engine combines Mercury’s trusted engineering with easy‑to‑use performance. Whether you’re heading out for a quick trip, a quiet fishing session, or simply cruising calm waters, the Mercury 4HP FourStroke gives you the confidence you need on every outing.

Smooth and Quiet FourStroke Performance

First and foremost, the FourStroke design ensures smooth, quiet operation with minimal vibration. Unlike two‑stroke engines, the Mercury 4HP FourStroke provides refined power delivery that enhances your comfort while on the water. Consequently, every run feels more pleasant and relaxed, allowing you to focus on enjoying your time rather than battling noise and harsh propulsion.

Simple Starting and Responsive Control

Moreover, this outboard is engineered for dependable starts and responsive throttle action. With its thoughtfully designed fuel and ignition systems, the engine starts easily in a variety of conditions, saving you time at the ramp. As a result, you benefit from confident control and smooth acceleration, making manoeuvring and docking more straightforward—even in tight spaces.

Efficient Fuel Use and Low Emissions

In addition, the Mercury 4HP FourStroke offers impressive fuel efficiency that helps you go further on less fuel. With clean combustion and reduced emissions compared with older designs, this engine supports environmentally conscious boating without sacrificing performance. Therefore, you enjoy both lower operating costs and a reduced environmental footprint on every trip.

Durable Build for Marine Conditions

Furthermore, Mercury builds this outboard with corrosion‑resistant materials and a robust design that stands up to challenging marine environments. From its sturdy lower unit to precision internal components, every part contributes to long‑lasting reliability. Meanwhile, straightforward maintenance keeps the engine performing at its best season after season.

A Versatile and Trusted Choice

Ultimately, the Mercury 4HP FourStroke combines smooth, efficient power with reliable performance and user‑friendly control. Therefore, whether you’re equipping a tender, upgrading an older engine, or powering a small boat for family outings, this outboard delivers dependable operation and enjoyable performance on every adventure.


If you’re unsure about the correct shaft length for your boat, check out this video.

SPECIFICATIONS

HP / KW 4 / 2.9
ENGINE TYPE 1 CYLINDER
DISPLACEMENT (CID/CC) 7.5 / 123
FULL THROTTLE RPM 4500 – 5500
FUEL INDUCTION SYSTEM 2-Valve pushrod (overhead valve)
RECOMMENDED FUEL 87 octane compatible (up to 10% ethanol)
RECOMMENDED OIL Mercury FourStroke Oil 10W-30
ENGINE PROTECTION OPERATOR WARNING SYSTEM Over-rev

Low oil pressure

STARTING Manual
STEERING Tiller
SHAFT LENGTH 15″ / 381mm

20″ / 508mm

GEARCASE RATIO 2.15:1
DRY WEIGHT 26.2kg / 57lbs
CARB STAR RATING 3
BORE AND STROKE 2.16 x 1.42″ / 55 x 36mm
IGNITION CDI w/ electronic spark advance
FUEL SYSTEM Carbureted
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 (L / gal) 1.1 / 3.3
OPTIONAL FUEL TANK (L / gal) 12 / 3.2
SKU: N/A Category:
Weight N/A
Dimensions N/A
Shaft Length

15", 20"

Brand

Mercury Outboard Engines

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