Mercury Outboard Engines

The Mercury F20 is a 20HP four-stroke outboard delivering serious thrust in a small, lightweight package. With EFI for precise fuel delivery, a high power-to-weight ratio, and Mercury’s Adaptive Speed Control, the 2-cylinder F20 offers quick acceleration, reliable trolling, and easy handling. At ~45–47 kg, it’s easily portable and perfect for inflatables, aluminum fishing boats, and as a dependable auxiliary engine.

• 20HP 2-cyl EFI outboard – 333cc engine with high power-to-weight and smooth performance
• Lightweight & portable – weighs only ~45–47 kg, easy to transport and install on small boats and dinghies
• EFI technology – sure-fire starting, smooth throttle response, and excellent fuel efficiency without a battery (draws minimal power)
• Adaptive Speed Control – maintains steady RPM under load for stable trolling and better maneuverability
• Flexible configurations – manual or electric start, tiller or remote steering available, to fit a wide range of small craft applications

Mercury F15 offers a step up in power to 15HP, making it an excellent choice for larger inflatables, fishing boats, and as a kicker motor. This 2-cylinder EFI outboard features easy electric or manual starting, smooth low-end torque for quick planing even on loaded boats, and a compact, low-vibration design. Weighing ~52 kg (with electric start), it remains portable and delivers a perfect blend of strength and efficiency for intensive use in fresh or salt water.

• 15HP 2-cyl EFI outboard – 333cc engine with electronic fuel injection for effortless starts and acceleration
• More power, same portability – offers higher output for bigger boats while still light (~45–52 kg depending on configuration)
• Strong low-RPM torque – plenty of grunt to push heavier boats onto plane and maintain speed under load
• Compact & quiet – low vibration, sound-dampened design for smooth trolling and comfortable cruising
• Multiple setups – available in short or long shaft, with manual or electric start, to match various boat types and uses

The Mercury F10 is a 10HP four-stroke outboard that combines low weight with impressive performance for its class. Featuring EFI for easy starting and smooth power, this 2-cylinder motor is designed for portability and convenience. At ~45 kg, it’s one of the lightest 10HP engines, offering quiet operation, high reliability, and multi-layer corrosion protection for a long life in both fresh and salt water.

• 10HP 2-cyl EFI outboard – delivers big performance from a compact 208cc/333cc engine (market-specific design) with fuel injection
• Easy portable power – lightweight (~45 kg) and compact, ideal for dinghies, small RIBs, and portable applications
• Surefire starts & smooth throttle – EFI system ensures quick, battery-free starting and responsive acceleration in all weather
• Low vibration & noise – inline twin-cylinder configuration runs smoothly with minimal vibration; through-prop exhaust for quieter operation
• Durable Mercury build – marine-grade alloy, multi-layer anti-corrosion finish, and oil pressure protection for dependable operation in harsh environments

he Mercury F9.9 EFI is a 9.9HP four-stroke outboard that delivers the maximum power available without exceeding the 10HP threshold. Featuring Electronic Fuel Injection, this twin-cylinder portable motor ensures effortless starts, smooth performance, and excellent fuel economy in a lightweight package. It’s an ideal choice for small fishing boats, inflatable tenders, and other compact vessels where reliability and ease of use are paramount.

• 9.9HP twin-cylinder four-stroke engine with EFI for easy starting in all conditions and improved fuel efficiency
• Lightweight (~38 kg) portable design with convenient carry handles; manual start requires no battery (battery-free EFI system)
• Outstanding fuel economy – up to 27% more efficient than previous carbureted models, meaning longer trips on a single tank
• Quiet operation with low vibration thanks to a balanced twin-cylinder design and rubber mounts; advanced tiller handle allows one-hand control of throttle, shifting, and steering
• Ideal for jon boats, small fishing skiffs, and inflatable boats (~3–5 m), as well as a kicker for sailboats – delivers quick acceleration, dependable performance, and often no registration needed (in many regions for boats under ~4.5 m)

The Mercury F8 EFI is an 8HP four-stroke outboard that blends easy portability with modern EFI fuel injection technology. This twin-cylinder engine is lightweight, quiet, and simple to operate – perfect for inflatables, jon boats, and small fishing vessels. The Mercury F8 EFI offers instant starts, smooth running, and fuel savings while still providing ample power for your on-water adventures.

• 8HP inline two-cylinder 4-stroke engine with Electronic Fuel Injection – reliable quick starts and low fuel consumption in all weather
• Compact, lightweight design (~37 kg) for easy carrying and installation; battery-free EFI ignition on manual-start models adds convenience and mobility
• Exceptionally smooth and low-vibration operation – balanced engine with rubber mounts minimizes noise, great for peaceful trolling and cruising
• Multi-function tiller handle with all controls at your fingertips – throttle, F-N-R gears, steering and tilt – allows comfortable one-handed operation (adaptable for right or left-hand use)
• Ideal for small boats and RIBs up to ~4 m, delivering sufficient thrust for 2–4 passengers. Staying under 10HP means no registration required for the boat in many areas (when size limits are met)

The Mercury F6 is a 6HP outboard engine – the most powerful model in Mercury’s portable single-cylinder lineup. This compact four-stroke motor offers exceptional mobility, smooth running, and even the ability to charge a battery (with an optional alternator kit). It’s ideal for fishing boats, inflatable dinghies, and as an auxiliary on sailboats when maximum power is needed in an easy-to-carry size.

• 6HP single-cylinder four-stroke engine – top horsepower among portables, weighing only ~25–27 kg
• Easy to carry and install – built-in handles and compact dimensions; 1.1L internal fuel tank for short trips and option to connect an external tank for longer journeys
• Plenty of thrust to plane small boats and propel heavier loads (e.g. 3m+ inflatables with crew or 15–20 ft sailboats for docking maneuvers)
• Low vibration and quiet operation – the F6 is well-balanced and water-cooled, allowing for extended trolling or cruising without fatigue
• Optional charging system – ability to add an alternator kit to charge a battery or power onboard electronics (especially useful for sailboats). Under 20HP, no registration needed in most regions (for boats ≤4.57 m)

The Mercury F5 is a reliable 5HP outboard motor that strikes an excellent balance between portability and power. This four-stroke single-cylinder engine is suitable for larger inflatables, small fishing boats, and also serves well as a kicker (auxiliary) for sailboats. The Mercury F5 runs smoothly and efficiently, and it offers the option to connect an external fuel tank and even a special Sail Power version for sailing enthusiasts.

• 5HP single-cylinder 4-stroke engine – maximum horsepower in a still-compact form (~25 kg), easy to transport and install
• Ideal for medium inflatables, small dinghies/jon boats, or as a backup outboard for a sailing yacht
• Smooth, quiet operation with low fuel consumption; easy manual start and minimal maintenance required
• Integrated 1.1L fuel tank for short trips + ability to attach an external tank for longer excursions – greatly extends your range
• Available in a Sail Power edition (long shaft) – includes a charging alternator to charge batteries and a high-thrust propeller optimized for sailboats

The Mercury F4 is a 4HP portable outboard engine that provides dependable power in an ultra-compact form. This single-cylinder four-stroke motor is perfect for small dinghies, tenders, and fishing skiffs. It is extremely easy to carry, mount, and operate, making it a favorite for short trips and calm waters. The Mercury F4 starts reliably, runs quietly, and requires minimal maintenance – an excellent choice for both novice and experienced boaters alike.

• 4HP single-cylinder 4-stroke engine (~25 kg) – reliable power for small vessels in a lightweight, convenient package
• Very easy to start and handle – manual recoil starting with decompression; simple tiller with twist-grip throttle and F-N-R gears
• Integrated fuel tank (1.1L) for grab-and-go operation with no extra fuel tanks needed – ideal for short cruises and quick outings
• Low vibration and noise – allows peaceful trolling or slow cruising without tiring out the operator or spooking the fish
• Perfect for small inflatables, 2–3 m rowboats or as a tender; no registration or special license needed in the recreational category

The Mercury F3.5 is a 3.5HP four-stroke outboard that offers a step up in power from the smallest models while remaining extremely lightweight (~17 kg). This compact engine is easy to transport and mount, making it ideal for small inflatables, rowboats, or canoes. The Mercury F3.5 delivers reliable performance for fishing or tender duties, and its simple design means hassle-free operation and maintenance.

• 3.5HP single-cylinder 4-stroke outboard weighing only ~17 kg – very easy for one person to carry and install
• Provides more thrust than the 2.5HP class – helpful when you have a slightly larger load or need a bit more speed on the same small boat
• 360-degree steering capability for full maneuverability and an integrated Neutral gear for safe idling; no reverse gear needed – just spin the engine around for reverse thrust
• Built-in fuel tank (~1L) offers convenient fuel supply for short trips; extremely low fuel consumption, ideal for extended trolling
• Perfect for small inflatables and dinghies up to ~2.5–3 m, rowboats or canoes; great for fishing on calm waters or as a lightweight backup motor for a yacht tender. No registration or license required in this small engine class

The Mercury F2.5 is a 2.5HP four-stroke outboard engine – Mercury’s most compact portable model. Weighing around 17 kg, it is incredibly easy to carry, mount, and store. Despite its small size, the F2.5 offers reliable propulsion for small inflatables, dinghies, and other very small boats. It’s the perfect solution for boaters who need a simple, lightweight motor for short trips or emergency backup power.

• 2.5HP single-cylinder 4-stroke engine – Mercury’s lightest outboard (~17 kg), effortless to transport
• Ultra-compact design with integrated fuel tank, ideal for tiny dinghies, kayaks, or canoe-type boats – just fuel up and go
• Easy pull-start and simple throttle control; features Forward gear and Neutral, with reverse achieved by spinning the engine 180°
• Quiet and fuel-efficient – minimal fuel usage and low emissions, great for serene lakes, ponds, and sheltered bays
• Excellent as an emergency “get-home” motor or for quick fishing trips; requires no registration or operator license in this low-power class