Mercury 25hp EFI Tiller FourStroke Outboard Motor, 15″ Shaft – Manual Tilt/Trim – Electric Start

3,465.00

Mercury® 25hp EFI FourStroke outboards are built for big adventures. With a capable 3-cylinder powerhead, these engines have broad applications for 11- to 16-foot long rigid inflatables, jon boats, fishing boats and more. Their hassle-free-maintenance design, efficient fuel system and easy-starting EFI technology make boating simpler, so you can spend more time exploring. Mercury SmartCraft® compatibility (for electric start models) gives access to a wide range of intelligent gauges, displays and other connected technologies. Get ready to go farther and stay out longer with a Mercury FourStroke outboard. Includes a 6.6-gallon remote fuel tank and tiller handle.

  • Ambidextrous and adjustable tiller for optimal control
  • Lightweight, compact design
  • Convenient electric start
  • Easy oil change system keeps maintenance simple and clean
  • Built with saltwater-safe components and corrosion-preventive technologies
  • Power tilt and trim for easy deployment
  • Smooth and quiet operation
  • Efficient, easy-starting EFI performance
  • 17-amp alternator helps keep battery system charged
  • Mercury SmartCraft compatible for integration with Mercury technologies, including Troll Control and VesselView Mobile®

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

Mercury 25hp EFI Tiller FourStroke Outboard Motor, 15″ Shaft – Manual Tilt/Trim – Electric Start
Horsepower 25
Starting Type Electric
Steering Type Tiller
Shaft Length 15″
Engine Type 3-Cylinder
Engine Weight 138 lbs.
Fuel Tank Capacity 6.6 gal.
Fuel Tank Included Yes
Propeller Included No
Pursuit Recreational Boating
Recommended Fuel 87 Octane (Up to 10% Ethanol)
Recommended Oil 25W-40
Trim/Tilt Manual
Model Number 1A25301BK

Description

Mercury 25hp EFI Tiller FourStroke Outboard Motor, 15″ Shaft – Manual Tilt/Trim – Electric Start

Reliable Power Designed for Every Boating Journey

Performance on the water should feel effortless, dependable, and confidence-inspiring. For boaters who value efficiency without sacrificing strength, the Mercury 25hp EFI Tiller FourStroke Outboard Motor, 15″ Shaft – Manual Tilt/Trim – Electric Start delivers a refined balance of power, control, and innovation.

Whether your days are spent navigating inland lakes, managing light commercial workloads, or enjoying recreational fishing with family and friends, this outboard motor has been engineered to support your goals with consistency and ease. From its advanced fuel injection system to its thoughtfully designed tiller handle, every detail has been crafted to enhance your on-water experience.


Why This Mercury 25hp EFI Outboard Stands Apart

Engineered for Smooth, Efficient Performance

At the core of this outboard motor lies a modern Electronic Fuel Injection (EFI) FourStroke engine. Unlike traditional carbureted systems, fuel delivery is precisely managed, allowing smoother starts, improved throttle response, and optimized fuel economy across varying conditions.

As a result, cold starts become predictable, idling remains stable, and acceleration feels responsive—particularly valuable when maneuvering in tight spaces or adjusting speed frequently.

Built with the Boater in Mind

Rather than focusing only on raw horsepower, this model emphasizes usability, reliability, and comfort. The tiller steering system has been designed to reduce fatigue during extended operation, while the electric start ensures effortless ignition at the push of a button.

Meanwhile, the manual tilt and trim system provides hands-on control, giving you the confidence to adjust positioning when launching, trailering, or navigating shallow waters.


Key Features at a Glance

Highlighted Product Specifications

  • Horsepower: 25 HP

  • Engine Type: FourStroke EFI

  • Starting System: Electric Start

  • Steering: Tiller Handle

  • Shaft Length: 15 Inches

  • Tilt/Trim: Manual

  • Fuel System: Electronic Fuel Injection

  • Application: Small to mid-size boats, inflatables, skiffs, utility vessels

Each specification has been selected to ensure dependable performance across diverse boating applications.


Advanced EFI Technology for Smarter Fuel Use

Precision Where It Matters Most

Fuel efficiency plays a crucial role in modern boating. Thanks to Mercury’s EFI technology, fuel is delivered in optimal amounts based on engine demand. Consequently, fuel waste is minimized while engine longevity is enhanced.

In addition, consistent fuel atomization reduces hesitation and improves overall responsiveness. Over time, this efficiency translates into lower operating costs and fewer maintenance concerns.

Environmentally Conscious Performance

Not only does EFI improve efficiency, but emissions are also reduced. Cleaner combustion contributes to a quieter, smoother ride while aligning with increasingly stringent environmental standards. Therefore, users can enjoy their time on the water while making a more responsible choice.

Mercury 25hp EFI Tiller FourStroke


FourStroke Reliability You Can Trust

Quiet, Smooth Operation

FourStroke engines are widely recognized for their smooth performance. This Mercury outboard is no exception. Vibration levels are kept low, allowing for a more comfortable experience—especially during long outings.

Moreover, quieter operation enhances conversations onboard and preserves the serenity of natural waterways.

Long-Term Durability

Designed for longevity, this engine benefits from robust internal components and corrosion-resistant materials. As a result, reliability remains consistent even in demanding conditions, including frequent use in freshwater or light saltwater environments.


Tiller Steering Designed for Comfort and Control

Ergonomic Handle Design

Control should feel natural, not forced. The tiller handle on this Mercury outboard has been shaped for ergonomic comfort, allowing intuitive throttle and steering control.

Additionally, hand positioning has been optimized to reduce wrist strain, which becomes increasingly important during extended operation.

Confident Low-Speed Maneuvering

Precise control at low speeds is essential when docking or navigating narrow waterways. Fortunately, the tiller steering system delivers predictable response, enabling smooth adjustments without abrupt movements.


Electric Start for Effortless Ignition

Start with Confidence Every Time

Gone are the days of struggling with pull cords. With electric start functionality, ignition becomes quick and reliable. This feature proves especially beneficial in colder weather or after extended periods of inactivity.

As a result, less time is spent preparing, and more time can be devoted to enjoying the water.

Enhanced Accessibility

Electric start also supports inclusive boating experiences. For users who may prefer or require reduced physical effort, this feature ensures accessibility without compromising performance.


Manual Tilt and Trim: Simple, Effective Control

Practical Adjustment for Real-World Conditions

Manual tilt and trim functionality provides hands-on control over engine positioning. Whether navigating shallow waters or trailering your boat, adjustments can be made quickly and confidently.

Furthermore, simplicity ensures fewer mechanical complexities, contributing to long-term reliability.

Optimized Propeller Performance

Proper trim adjustment allows the propeller to operate more efficiently. Consequently, handling improves while fuel consumption remains optimized.

Mercury 25hp EFI Tiller FourStroke


15″ Shaft Length: Ideal for Smaller Boats

Perfect Fit for Compact Hulls

The 15-inch shaft length is specifically designed for boats with lower transoms. This compatibility ensures optimal propeller depth, resulting in improved thrust and steering response.

Enhanced Stability on the Water

Correct shaft length contributes directly to engine efficiency and stability. Therefore, boaters benefit from smoother rides and predictable handling.


Ideal Applications and Use Cases

Versatile for Multiple Boating Styles

This Mercury 25hp EFI outboard motor is well-suited for:

  • Fishing boats

  • Inflatable boats

  • Aluminum skiffs

  • Utility vessels

  • Small pontoons

  • Tender boats

Because of its balanced design, it adapts easily to both recreational and light commercial use.


Benefits That Matter to You

Why Boaters Choose This Model

  • Reliable starting in various conditions

  • Reduced fuel consumption

  • Comfortable tiller steering

  • Simplified maintenance

  • Long-term durability

  • Inclusive, user-friendly operation

Each benefit contributes to a more enjoyable and stress-free boating experience.


Ownership Experience and Maintenance

Easy Servicing and Care

Routine maintenance has been simplified through accessible service points. Oil changes, inspections, and general upkeep can be performed efficiently, minimizing downtime.

Additionally, EFI systems require less frequent tuning, allowing owners to focus on time on the water rather than in the workshop.


Safety and Peace of Mind

Designed with Confidence in Mind

Safety features and predictable handling characteristics make this outboard suitable for both experienced boaters and newcomers alike. Smooth acceleration and responsive control reduce unexpected behavior, even in changing conditions.

Mercury 25hp EFI Tiller FourStroke


Long-Term Value Proposition

An Investment That Pays Off

While initial quality matters, long-term value defines ownership satisfaction. With fuel savings, reduced maintenance needs, and proven durability, this Mercury outboard represents a smart investment for years to come.


Frequently Asked Questions

Is this outboard suitable for saltwater use?

Yes, with proper flushing and maintenance, it can be used in saltwater environments.

Does the electric start require a battery?

Yes, a compatible marine battery is required for electric start functionality.

Can beginners operate this motor comfortably?

Absolutely. The intuitive controls and smooth performance make it accessible for all experience levels.

Performance Characteristics That Elevate Everyday Boating

Consistent Torque Across the RPM Range

Rather than delivering power in abrupt surges, the Mercury 25hp EFI Tiller FourStroke Outboard Motor, 15″ Shaft – Manual Tilt/Trim – Electric Start produces steady torque throughout the operating range. This characteristic ensures controlled acceleration, especially valuable when navigating crowded waterways or managing variable loads.

Consequently, throttle input feels predictable. Moreover, boat response remains balanced even when conditions change unexpectedly.

Optimized Power-to-Weight Balance

Although compact in form, this outboard motor has been engineered to maximize output without unnecessary bulk. Because weight distribution remains balanced, transom stress is reduced, contributing to improved hull performance over time.

Additionally, lighter handling during installation and transport becomes a tangible benefit for individual owners and fleet operators alike.


Fuel Efficiency That Supports Longer Adventures

More Time on the Water, Fewer Refueling Stops

Fuel efficiency directly influences how far and how comfortably you can travel. With EFI technology precisely regulating fuel delivery, consumption stays optimized across cruising and low-speed operation.

As a result, extended outings become feasible without constant concern for refueling. Furthermore, fuel budgeting becomes more predictable, particularly for frequent users.

Cost Savings That Accumulate Over Time

Reduced fuel usage does more than improve convenience—it lowers overall ownership costs. Over the lifespan of the motor, these incremental savings can be substantial.

Therefore, this outboard represents not only a performance upgrade but also a financially responsible decision.


Handling and Maneuverability in Real-World Conditions

Confident Control in Tight Spaces

Docking, launching, and shoreline navigation require precise control. Thanks to responsive tiller steering and smooth throttle modulation, fine adjustments feel intuitive rather than forced.Mercury 25hp EFI Tiller FourStroke Outboard Motor

In practice, this translates into reduced stress during close-quarters maneuvering.

Stability in Variable Water Conditions

Choppy water and sudden wakes demand predictable handling. Because the engine delivers consistent thrust, directional stability is maintained even when surface conditions fluctuate.Mercury 25hp EFI Tiller FourStroke Outboard Motor

Thus, both comfort and safety are enhanced during unpredictable moments.


Designed for Inclusive Boating Experiences

Accessibility Without Compromise

Boating should remain enjoyable for everyone involved. Features such as electric start and ergonomic tiller design reduce physical strain, making operation accessible to a wider range of users.Mercury 25hp EFI Tiller FourStroke Outboard Motor

Importantly, ease of use does not come at the expense of performance.

Shared Confidence Onboard

When controls feel intuitive, confidence spreads among all onboard participants. Consequently, shared boating experiences become more relaxed and inclusive.Mercury 25hp EFI Tiller FourStroke Outboard Motor


Durability Backed by Engineering Excellence

Corrosion Resistance Where It Matters

Exposure to water environments demands durable materials. This outboard incorporates corrosion-resistant components that protect vital systems from long-term wear.Mercury 25hp EFI Tiller FourStroke Outboard Motor

With consistent maintenance, operational integrity remains intact season after season.

Mercury 25hp EFI Tiller FourStroke Outboard Motor Built for Frequent Use

Whether used occasionally or regularly, the engine is designed to perform reliably. Internal components have been tested under demanding conditions, ensuring resilience during repeated operation cycles.Mercury 25hp EFI Tiller FourStroke Outboard Motor

Why This Outboard Is a Smart Choice

  • Smooth, predictable acceleration

  • Reliable electric starting system

  • Fuel-efficient EFI technology

  • Comfortable, ergonomic tiller control

  • Simplified manual tilt and trim

  • Proven FourStroke durability

  • Suitable for a wide range of small vessels

Each advantage directly supports a better ownership experience.


Comparison Insight: EFI vs Traditional Carbureted Systems

Why EFI Makes a Noticeable Difference

Traditional carbureted engines often struggle with inconsistent fuel delivery, especially during cold starts or altitude changes. By contrast, EFI systems automatically adapt to operating conditions.Mercury 25hp EFI Tiller FourStroke Outboard Motor

As a result, performance remains stable without frequent manual adjustments.

Reduced Maintenance Complexity

Because EFI systems self-regulate fuel-air mixtures, tuning requirements are minimized. Consequently, owners spend less time troubleshooting and more time enjoying their investment.Mercury 25hp EFI Tiller FourStroke Outboard Motor


Ideal Boat Pairings and Use Scenarios

Recreational Fishing Applications

Quiet operation and steady trolling speeds make this outboard well-suited for fishing enthusiasts. Subtle throttle control allows precise positioning without spooking fish.

Utility and Workboat Use

For light-duty commercial or utility vessels, reliability and fuel efficiency remain critical. This model supports consistent workloads while maintaining manageable operating costs.

Family and Leisure Boating

Smooth acceleration and intuitive handling contribute to a comfortable ride for passengers of all ages. Therefore, family outings become more enjoyable and less demanding.


Ownership Lifecycle and Long-Term Satisfaction

Straightforward Maintenance Schedule

Routine service intervals have been designed with owner convenience in mind. Accessible service points allow maintenance tasks to be completed efficiently.

Additionally, EFI technology reduces the likelihood of performance degradation over time.

Strong Resale Value

Mercury outboards are widely recognized for long-term reliability. Because of this reputation, resale value tends to remain strong, further enhancing total ownership value.


Environmental Responsibility Without Sacrifice

Reduced Emissions Profile

Cleaner combustion contributes to lower exhaust emissions. Consequently, users benefit from environmentally responsible performance without sacrificing power or responsiveness.

Quiet Operation Preserves Natural Settings

Lower noise output helps maintain the tranquility of lakes and waterways. This feature proves especially valuable in environmentally sensitive or residential areas.


Frequently Asked Buyer Considerations

Is manual tilt difficult to operate?

Manual tilt is straightforward and designed for ease of use, requiring minimal effort.

Does EFI improve cold-weather performance?

Yes, EFI systems significantly enhance cold-start reliability compared to carbureted engines.

Can this motor support frequent trailering?

Absolutely. Its balanced design and manageable weight simplify transport and installation.

Mercury 25hp EFI Tiller FourStroke


Why This Mercury 25hp EFI Outboard Fits Modern Boating Needs

Innovation, reliability, and accessibility converge in the Mercury 25hp EFI Tiller FourStroke Outboard Motor, 15″ Shaft – Manual Tilt/Trim – Electric Start. By addressing real-world boating demands—from fuel efficiency to ease of operation—this model supports both seasoned boaters and newcomers alike.

As boating expectations evolve, dependable technology becomes essential. This outboard meets those expectations with clarity, confidence, and long-term value.

Purpose-Built Powerhead Design

At the heart of the Mercury 25hp EFI Tiller FourStroke Outboard Motor, 15″ Shaft – Manual Tilt/Trim – Electric Start sits a compact yet robust powerhead engineered for efficiency and durability. Instead of prioritizing oversized components, the design focuses on balanced combustion, optimized airflow, and thermal stability.

Because internal tolerances are precisely managed, friction losses remain low. Consequently, usable power is delivered more efficiently while internal wear is reduced over time.

Intelligent Air and Fuel Management

Air intake pathways have been shaped to promote smooth, uninterrupted airflow. When paired with EFI-controlled fuel delivery, combustion remains consistent across varying throttle positions.

As conditions shift—whether due to load changes or temperature variation—the system adapts automatically. Therefore, performance stability is preserved without user intervention.


FourStroke vs TwoStroke: A Practical Comparison

Operational Differences That Matter

TwoStroke engines are often associated with lighter weight and higher peak output. However, FourStroke technology prioritizes smoothness, efficiency, and longevity.

With this Mercury outboard, the FourStroke advantage becomes clear through reduced vibration, quieter operation, and improved fuel economy.

Ownership Cost Considerations

While initial purchase price may vary between engine types, long-term ownership costs often favor FourStroke designs. Reduced fuel consumption, extended service intervals, and cleaner operation contribute to lower total cost of ownership.

As a result, many boaters find FourStroke EFI systems to be the more sustainable choice over time.


Fuel Economy Analysis Over the Ownership Lifecycle

Understanding Real-World Consumption

Fuel efficiency figures gain relevance only when applied to real usage patterns. In mixed-operation scenarios—such as idling, cruising, and short bursts of acceleration—EFI regulation ensures fuel delivery remains proportional to demand.

Accordingly, unnecessary fuel burn is avoided during low-load operation.

Long-Term Financial Impact

Over several seasons, incremental fuel savings accumulate. For frequent users, these savings can offset a significant portion of the initial investment.Mercury 25hp EFI Tiller FourStroke Outboard Motor

Therefore, efficiency should be viewed as a core value driver rather than a secondary feature.


Buyer Decision Matrix by Boat Type

Aluminum and Jon Boats

Lightweight hulls benefit from smooth, predictable thrust. Because torque delivery remains steady, planing occurs efficiently without excessive bow rise.

Inflatable and RIB Boats

Precise throttle control and manageable weight enhance safety and maneuverability. Additionally, electric start simplifies operation when launching from shore.

Small Pontoons and Utility Craft

Consistent low-speed performance supports relaxed cruising and task-oriented use. Fuel efficiency further enhances practicality for extended outings.

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