Mercury 3.5HP FourStroke


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Delivers lightweight, portable power and thrust for exact operation. Perfect for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.

 

$1,595.00

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Mercury 3.5HP FourStroke

Compact Power for Small Boats

The Mercury 3.5HP FourStroke outboard engine delivers reliable and efficient propulsion for a variety of small‑boat applications. Ideal for tenders, dinghies, inflatables, jon boats, and small aluminium craft, this engine combines Mercury’s proven engineering with smooth FourStroke performance. Whether you’re cruising across calm water, heading out for a fishing session, or simply maneuvering around the marina, the Mercury 3.5HP FourStroke gives you dependable power every time.

Smooth, Refined FourStroke Operation

First and foremost, the FourStroke design ensures quiet, refined operation with minimal vibration. Unlike two‑stroke engines, the Mercury 3.5HP runs smoothly across all throttle ranges, enhancing comfort on the water. Consequently, every outing feels more relaxing and enjoyable, with less noise and harsher engine feedback to distract you from the experience.

Easy Starting and Responsive Control

Moreover, this outboard is engineered for simple, dependable starts in a range of conditions. With thoughtfully calibrated fuel and ignition systems, the engine starts quickly and consistently—saving you time at the ramp and more time on the water. As a result, you benefit from responsive throttle control that makes manoeuvring, docking, and tight turns smooth and confident.

Fuel Efficiency and Low Emissions

In addition, the Mercury 3.5HP FourStroke delivers excellent fuel efficiency, helping you go further on less fuel. Its clean combustion promotes lower emissions compared with older engine designs, making it a more environmentally friendly choice. Therefore, you enjoy both cost‑effective operation and reduced environmental impact on every run.

Built for Durability in Marine Environments

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

A Practical and Trusted Choice

Ultimately, the Mercury 3.5HP FourStroke combines smooth, efficient power with dependable performance and user‑friendly control. Therefore, whether you’re equipping a tender, upgrading an older outboard, or powering a small boat for family outings, this engine delivers trustworthy 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 3.5 / 2.6
ENGINE TYPE 1 CYLINDER
DISPLACEMENT (CID/CC) 5.2 / 85
FULL THROTTLE RPM 5000 – 6000
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
STARTING Manual
STEERING Tiller with 360 degree turning
SHAFT LENGTH 15″ / 381mm

20″ / 508mm

GEARCASE RATIO 2.15:1
DRY WEIGHT 18.4kg / 41lbs
CARB STAR RATING 3
EMISSIONS 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
GEARCASE OPTIONS Standard
TRIM SYSTEM 4 Position
TRIM POSITIONS 4
EXHAUST SYSTEM Above Prop
SHALLOW WATER TRIM RANGE (DEGREES) 16
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Weight N/A
Dimensions N/A
Shaft Length

15", 20"

Brand

Mercury Outboard Engines

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