Mercury 20hp EFI Tiller FourStroke Outboard Motor 20” Shaft, Manual Tilt/Trim, Electric Start/Manual Backup
€2,879.00
Mercury® 20hp EFI FourStroke outboards are built for big adventures. Their impressive power-to-weight ratios make them ideal for pairing with jon boats, inflatables, micro-skiffs, aluminum V-hulls and other small utility boats. Plus, with their hassle-free-maintenance design, efficient fuel system and easy-starting EFI technology, boating is simpler, so you can spend more time exploring. Get ready to go farther and stay out longer with a Mercury FourStroke outboard. Includes a 3.2-gallon remote fuel tank, propeller and tiller handle.
- Electric start
- 6-position manual trim
- Ambidextrous, ergonomic tiller
- Efficient, easy-starting EFI performance
- Lightweight, compact design for optimal performance on small boats
- Smooth and quiet operation
- Built for years of adventure, with rugged, durable components and enhanced corrosion resistance
- Low-hassle maintenance thanks to an easy-drain gearcase, no-mess oil filter drip tray and lifetime maintenance-free valve train
- 12-amp alternator helps keep battery system charged
- Includes 3.2-gallon remote fuel tank and prop
NOTE: When you unpack your engine, please follow the “Engine Break-In Procedure,” which is outlined inside your engine operation and maintenance manual. First, look over your engine before starting. Then, fill it with engine oil, and check its gear lube level. Next, ensure the propeller is included and secure. Lastly, be sure to review your Mercury Marine Limited Warranty, and your Customer Delivery Inspection (CDI) process should be logged on Mercurymarine.com. Failure to comply with the engine break-in procedure can result in severe engine damage not covered by Mercury Marine Limited Warranty.
Specifications
| Horsepower | 20 |
| Starting Type | Electric |
| Steering Type | Tiller |
| Shaft Length | 20″ |
| Engine Type | 2-Cylinder |
| Engine Weight | 115 lbs. |
| Fuel Tank Capacity | 3.2 gal. |
| Fuel Tank Included | Yes |
| Propeller Included | Yes |
| Pursuit | Recreational Boating |
| Recommended Fuel | 87 Octane (Up to 10% Ethanol) |
| Recommended Oil | 25W-40 |
| Trim/Tilt | Manual |
| Model Number | 1A20311LK |
Description
Mercury 20hp EFI Tiller FourStroke Outboard Motor 20 A Smarter Way to Power Your Time on the Water
Choosing the right outboard motor shapes every experience that follows on the water. From the first turn of the key to the final mile back to shore, performance, reliability, and control influence safety, enjoyment, and long-term value. Because of that reality, the Mercury 20hp EFI Tiller FourStroke Outboard Motor with 20” Shaft, Manual Tilt/Trim, and Electric Start with Manual Backup has been engineered to meet modern expectations without unnecessary complexity.
Rather than overengineering for niche use cases, Mercury focused on balance. Power delivery remains predictable. Fuel efficiency stays consistent. Handling feels intuitive. As a result, this outboard supports a wide range of operators, vessels, and environments while maintaining the durability standards associated with Mercury Marine.
Equally important, ownership is designed to feel accessible. Maintenance intervals are practical. Controls are positioned logically. Starting procedures remain straightforward. Consequently, both seasoned boaters and first-time owners can operate with confidence.
Built for Today’s Boaters, Not Yesterday’s Limitations
Why Modern Outboard Buyers Expect More
Boating has evolved. Regulations have changed. Fuel costs fluctuate. Environmental awareness continues to grow. Therefore, modern outboards must deliver more than raw horsepower alone.
This 20hp FourStroke platform responds directly to those expectations. Electronic Fuel Injection replaces outdated carburetor systems. Emissions are reduced. Cold starts become reliable. Meanwhile, noise and vibration are minimized to improve onboard comfort.
Instead of forcing operators to compromise between performance and efficiency, Mercury integrates both. Consequently, time on the water becomes more predictable, more enjoyable, and more economical.
Understanding the Value of 20 Horsepower
The Sweet Spot Between Capability and Efficiency
Twenty horsepower occupies a strategic position in the outboard market. Enough thrust is provided to plane small to mid-sized boats efficiently. At the same time, excess weight and unnecessary fuel consumption are avoided.
Because of this balance, the Mercury 20hp EFI FourStroke outboard is frequently selected for:
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Aluminum fishing boats
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Utility skiffs
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Tenders
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Jon boats
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Lightweight commercial craft
Rather than overwhelming the hull, the engine complements it. As a result, handling remains responsive and predictable across a wide range of operating conditions.
Electronic Fuel Injection (EFI): Consistency You Can Rely On
Why EFI Changes the Ownership Experience
Electronic Fuel Injection continuously monitors engine conditions and adjusts fuel delivery in real time. Consequently, smoother throttle response is achieved, hesitation is reduced, and overall reliability improves.
Unlike carbureted systems, EFI does not depend on manual choke adjustments. Therefore, starting becomes easier in cold weather, hot climates, and varying altitudes.
Additionally, fuel efficiency is optimized automatically. Over time, that efficiency translates into lower operating costs and fewer refueling interruptions.
Tiller Steering: Direct Control Where It Matters Most
Intuitive Handling for Precision Maneuvering
Tiller steering places control directly in the operator’s hand. Throttle input, steering response, and engine feedback remain immediate and intuitive. As a result, docking, trolling, and navigating tight waterways become more manageable.
This configuration is especially valued in fishing and utility applications, where frequent speed adjustments are required. Rather than relying on remote systems, operators maintain direct engagement with the engine’s performance.
Furthermore, tiller steering reduces installation complexity. Fewer components mean fewer potential points of failure, contributing to long-term reliability.
20-Inch Shaft Length: Compatibility Without Guesswork
Designed for Standard Transom Heights
The 20-inch shaft length aligns with the most common transom configurations found on small to mid-sized boats. Because of this compatibility, installation remains straightforward and performance remains optimized.
Correct shaft length ensures proper propeller immersion. Consequently, ventilation is reduced, thrust is maintained, and engine cooling remains effective.
By selecting a 20-inch shaft, operators avoid the inefficiencies associated with improper mounting heights while preserving overall handling characteristics.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Manual Tilt and Trim: Practical Adjustability When You Need It
Control Without Unnecessary Complexity
Manual tilt and trim functionality allows operators to adjust engine angle based on load, water depth, and operating conditions. Shallow-water navigation becomes safer. Beaching the boat becomes simpler. Trailering is handled with ease.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Instead of relying on powered systems that add weight and maintenance requirements, this manual configuration prioritizes reliability and user control. Therefore, adjustments remain quick, deliberate, and dependable.
Electric Start with Manual Backup: Confidence in Every Scenario
Redundancy That Supports Peace of Mind
Electric start functionality simplifies daily operation. With a turn of the key, the engine comes to life quickly and smoothly. However, Mercury extends confidence further by including a manual backup starting option.
If battery power becomes unavailable, manual starting ensures continued operation. As a result, unexpected interruptions are minimized and safety margins are preserved.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
This dual-start system reflects a thoughtful approach to real-world boating conditions, where redundancy matters.
Designed for Inclusive Use Across Skill Levels
Accessible Controls and Logical Layout
Not every operator has decades of mechanical experience. Recognizing that reality, Mercury designed this outboard with inclusive usability in mind.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Controls are positioned intuitively. Force requirements are manageable. Visual indicators are clear. Consequently, learning curves are shortened and operational confidence develops quickly.
By reducing unnecessary complexity, this outboard invites more people to enjoy boating without intimidation or frustration.

Engineering That Prioritizes Real-World Performance
Behind every dependable outboard lies a series of deliberate engineering decisions. Rather than focusing solely on peak output figures, the Mercury 20hp EFI Tiller FourStroke Outboard Motor with 20” Shaft, Manual Tilt/Trim, and Electric Start with Manual Backup emphasizes usable power, mechanical efficiency, and operational longevity.
Because boats operate in varied environments, Mercury designs engines to perform consistently across changing loads, temperatures, and water conditions. As a result, this 20hp platform delivers predictable behavior whether the boat carries light recreational gear or heavier working loads.
Importantly, engineering choices favor durability without sacrificing refinement. Consequently, operators experience smooth acceleration, reduced vibration, and dependable torque throughout the operating range.
FourStroke Architecture: Efficiency Without Compromise
How FourStroke Design Improves Ownership
FourStroke engines separate fuel combustion from lubrication. Because oil is not burned during operation, emissions are reduced and internal wear is minimized. Additionally, fuel efficiency improves compared to traditional two-stroke alternatives.
In practical terms, this design supports longer service intervals and cleaner operation. Over time, owners benefit from lower maintenance costs and a reduced environmental footprint.
Moreover, quieter operation enhances onboard comfort. Conversations remain possible. Fatigue is reduced. Therefore, longer days on the water become more enjoyable for everyone aboard.
Electronic Fuel Injection (EFI): Precision at Every Throttle Position
Fuel Delivery That Adapts in Real Time
Electronic Fuel Injection replaces mechanical guesswork with digital precision. Sensors continuously monitor engine temperature, air intake, throttle position, and load demand. Consequently, fuel delivery is adjusted instantly to match operating conditions.
Instead of relying on fixed fuel circuits, the EFI system responds dynamically. Acceleration becomes smoother. Throttle transitions feel refined. Fuel waste is minimized.
Because EFI compensates automatically, operators do not need to adjust choke settings or anticipate starting challenges. As a result, reliability improves across cold mornings, hot afternoons, and variable altitudes.
EFI vs Carbureted Systems: A Practical Comparison
Carbureted engines depend on airflow and mechanical adjustments to mix fuel and air. While functional, those systems struggle to adapt to environmental changes.
EFI systems, by contrast, deliver consistent performance regardless of conditions. Therefore:
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Cold starts become faster and more reliable
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Fuel economy remains stable under load changes
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Emissions are reduced
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Long-term tuning requirements decrease
For owners seeking predictable operation and lower total cost of ownership, EFI represents a meaningful upgrade.
Power Delivery Tuned for Control, Not Excess
Torque Where It Matters Most
Peak horsepower figures rarely tell the full story. In real boating scenarios, usable torque determines how effectively a boat accelerates, planes, and responds to load changes.
This Mercury 20hp engine is tuned to deliver torque smoothly across the mid-range. Consequently, acceleration feels controlled rather than abrupt. Load carrying becomes manageable. Planing occurs without excessive throttle input.
Such tuning benefits fishing, utility, and transport applications alike. Operators gain confidence knowing the engine responds predictably in demanding situations.Mercury 20hp
Cooling System Design: Sustaining Performance Over Time
Efficient Heat Management
Outboard engines operate in demanding thermal environments. Effective cooling protects internal components and preserves performance consistency.
Mercury’s cooling architecture circulates water efficiently through critical engine areas. As a result, operating temperatures remain stable even during extended run times.
By maintaining thermal balance, the engine avoids premature wear. Therefore, service life is extended and reliability remains high.

Noise, Vibration, and Harshness (NVH) Control
Refinement You Can Feel and Hear
Mechanical refinement contributes directly to perceived quality. Excess vibration leads to fatigue. Elevated noise diminishes comfort. Consequently, NVH control plays a critical role in engine design.
This 20hp FourStroke integrates vibration-damping mounts and balanced internal components. As a result, engine operation feels smooth across the RPM range.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Noise levels are reduced through exhaust tuning and combustion efficiency. Therefore, the onboard experience remains calm, even during extended operation.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Tiller Handle Engineering: Ergonomics with Purpose
Designed for Extended Use
The tiller handle serves as the primary interface between operator and engine. Because of that importance, Mercury engineers prioritize ergonomics and responsiveness.
Grip design reduces hand fatigue. Throttle resistance is calibrated for precise control. Steering feedback remains direct without feeling harsh.
As a result, operators maintain confidence during long fishing sessions, repeated docking maneuvers, or variable-speed travel.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
20-Inch Shaft Length: Hydrodynamic Efficiency Explained
Why Shaft Length Affects Performance
Proper shaft length ensures the propeller remains submerged at optimal depth. If the engine sits too high, ventilation occurs. If mounted too low, drag increases.
The 20-inch shaft length positions the propeller ideally for standard transoms. Consequently, thrust efficiency improves and cooling water flow remains consistent.Mercury 20hp
By maintaining correct geometry, overall handling and fuel economy benefit.
Manual Tilt and Trim: Mechanical Simplicity, Functional Advantage
Adjustability Without Dependence on Electronics
Manual tilt and trim systems rely on mechanical positioning rather than powered actuators. Because of this simplicity, reliability increases and maintenance requirements decrease.
Operators can adjust engine angle based on load distribution or water depth. Shallow-water navigation becomes safer. Trailering becomes easier.
Importantly, manual systems reduce exposure to electrical faults. Therefore, confidence is preserved in remote or demanding environments.
Electric Start with Manual Backup: Dual-Layer Reliability
Designed for Uninterrupted Operation
Electric starting streamlines daily use. With minimal effort, the engine comes online quickly and smoothly.
However, Mercury acknowledges that batteries can fail. Consequently, a manual backup starting option is integrated. This redundancy ensures continued operation when electrical power is unavailable.
For safety-conscious operators, this feature provides meaningful reassurance.
Materials and Corrosion Resistance
Built to Withstand Marine Environments
Saltwater exposure, humidity, and temperature fluctuations place constant stress on marine equipment. To address these challenges, Mercury selects materials engineered for corrosion resistance.
Protective coatings shield critical components. Fasteners are designed to resist degradation. Internal passages are treated to reduce long-term wear.Mercury 20hp
As a result, structural integrity is maintained even under frequent exposure to harsh conditions.
Maintenance Accessibility: Designed for Practical Ownership
Simplifying Routine Service
Routine maintenance should not feel intimidating. Recognizing this, Mercury designs engine layouts that allow straightforward access to service points.
Oil changes are simplified. Inspection intervals are predictable. Consumable components are easy to identify.
Because maintenance remains manageable, owners are more likely to follow recommended service schedules. Consequently, engine longevity improves.
One Outboard, Many Ways to Use It
Every boater approaches the water with different priorities. Some focus on quiet mornings spent fishing. Others depend on their boat as a working tool. Still others value flexibility for recreation and transport. Because those needs vary, the Mercury 20hp EFI Tiller FourStroke Outboard Motor with 20” Shaft, Manual Tilt/Trim, and Electric Start with Manual Backup has been designed to perform consistently across diverse scenarios.
Rather than limiting itself to a narrow application, this outboard adapts. Power delivery remains predictable. Controls remain intuitive. Efficiency remains stable. Consequently, owners gain versatility without sacrificing reliability.
Fishing Applications: Precision, Control, and Quiet Confidence
Designed for Anglers Who Value Control
Fishing often demands slow-speed maneuvering, frequent throttle changes, and quiet operation. For those reasons, tiller-controlled outboards remain a preferred choice among anglers.
This Mercury 20hp platform delivers smooth low-RPM performance. As a result, trolling speeds are maintained easily without surging or stalling. Throttle response feels progressive, allowing precise adjustments when positioning near structure or shorelines.
Because vibration is minimized, fatigue is reduced during long sessions. Additionally, quieter operation helps maintain a calm environment, supporting a more focused fishing experience.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Shallow-Water Advantage for Inland Fishing
Many fishing environments include shallow flats, riverbanks, and weed-lined areas. Manual tilt and trim functionality allows the engine to be raised quickly when navigating these zones.
Instead of risking propeller damage, operators can adjust engine position proactively. Consequently, access to productive fishing spots improves while equipment remains protected.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Recreational Boating: Reliable Power for Relaxed Days
Smooth Performance for Family and Leisure Use
Recreational boating places different demands on an outboard. Smooth acceleration, predictable handling, and easy operation matter more than peak performance metrics.
This 20hp FourStroke engine delivers consistent thrust without abrupt behavior. Therefore, passengers experience comfortable transitions when accelerating or slowing down.
Electric start functionality simplifies operation for all users. Meanwhile, intuitive tiller controls ensure that even less-experienced operators feel confident at the helm.
Fuel Efficiency That Extends Time on the Water
Longer outings require dependable fuel economy. EFI technology optimizes fuel delivery continuously, reducing unnecessary consumption.Mercury 20hp
As a result, owners spend more time enjoying the water and less time refueling. Over the long term, operating costs remain manageable, supporting frequent recreational use.
Utility and Workboat Applications: Dependability Under Load
Practical Power for Everyday Tasks
Utility boats and light commercial vessels often carry equipment, supplies, or cargo. In these scenarios, predictable torque and reliability matter more than speed.Mercury 20hp
This Mercury 20hp outboard provides steady mid-range torque. Consequently, load handling remains manageable and acceleration feels controlled.
Because the engine responds consistently, operators can focus on the task at hand rather than compensating for erratic performance.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20

Reduced Downtime Through Simplicity
Workboats benefit from straightforward systems. Manual tilt and trim reduce reliance on powered components. EFI reduces tuning requirements. FourStroke architecture extends service intervals.
Together, these design choices minimize downtime. Therefore, productivity remains high and maintenance interruptions remain limited.Mercury 20hp EFI Tiller FourStroke Outboard Motor 20
Tender and Transport Roles: Compact Yet Capable
Supporting Larger Vessels with Confidence
Tenders require engines that start reliably, maneuver easily, and operate efficiently. This 20hp outboard fulfills those requirements without excessive size or weight.
Tiller steering enables precise docking. Electric start simplifies frequent use. Manual backup ensures continued operation when power systems are limited.
Because installation remains simple, this outboard integrates smoothly into tender applications.
Inland vs Coastal Use: Adaptability Across Environments
Freshwater Performance
In lakes and rivers, quiet operation and efficiency take priority. EFI technology ensures smooth starts and stable idle performance, even in cooler conditions.
Manual tilt and trim support shallow-water navigation commonly encountered inland. As a result, versatility improves across varying water depths.
Coastal and Nearshore Operation
Coastal environments introduce saltwater exposure and variable conditions. Corrosion-resistant materials and protective coatings address these challenges.
Although designed primarily for smaller craft, this Mercury outboard handles nearshore conditions confidently when matched appropriately to hull size and load.
Skill-Level Inclusivity: Accessible for All Operators
Supporting Both New and Experienced Boaters
Boating should feel approachable. For that reason, this outboard prioritizes intuitive operation.
Controls respond predictably. Starting procedures remain simple. Maintenance access feels manageable.
New operators build confidence quickly. Experienced boaters appreciate efficiency and refinement. Consequently, this engine supports a broad user base without compromise.







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