Your 2024 Guide to Buying a 115 HP Mercury Outboard: Prices, Specs & Expert Tips

Picture this: you’re standing at the dock, looking at your boat. Maybe it’s a center console that’s lost its pep, a pontoon that struggles with a full load, or perhaps you’re finalizing your first boat purchase. You know you need reliable power in that sweet spot of 115 horsepower—enough to get you on plane quickly, cruise efficiently, and handle whatever the water throws your way. Your search inevitably leads you to one of the most trusted names in marine propulsion: Mercury Marine.

If you’re searching for a “115 hp Mercury outboard for sale,” you’ve come to the right place. The price of a new 115 HP Mercury Outboard typically ranges from $15,000 to $20,000+, depending on the model year, specific series (Pro XS, FourStroke), and included controls/rigging. But the sticker price is just the beginning. This comprehensive guide will break down the costs, compare the key models, highlight essential features, and provide the expert tips you need to make a confident, informed purchase decision.

Understanding the 115 HP Mercury Lineup: Which Model is Right for You?

Not all 115 hp outboards are created equal. Mercury offers distinct models within this horsepower class, each engineered with a specific type of boater in mind. Choosing the right one is the first and most critical step in your buying journey.

Mercury 115hp FourStroke: The All-Around Performer

The Mercury 115hp FourStroke is the workhorse of the lineup, designed for boaters who prioritize reliability, fuel efficiency, and smooth, quiet operation. Built on decades of four-stroke innovation, this engine is the go-to choice for family boating, leisurely cruises, and long days on the water where minimizing fuel stops and maximizing comfort are key.

Reliability: With a simple, durable design and a proven track record, this engine is built for the long haul.
Fuel Efficiency: Technologies like standard electronic fuel injection ensure optimal fuel burn across the entire RPM range, saving you money at the pump.
Smooth & Quiet: Advanced sound-dampening materials and a balanced design make for an exceptionally quiet ride, perfect for conversation or enjoying the sounds of nature.
Ideal Use Cases: Pontoon boats, family runabouts, aluminum fishing boats, and as a repower option for older vessels.

Mercury 115 Pro XS: The High-Performance Choice

For those who feel the need for speed and superior acceleration, the Mercury 115 Pro XS is the answer. This isn’t just a badge; it’s a purpose-built high-performance engine derived from Mercury’s racing heritage. It’s engineered to deliver more power at the top end and sharper throttle response.

Increased RPM Range: The Pro XS spins at a higher maximum RPM, unlocking more horsepower and delivering a higher top-end speed.
Enhanced Acceleration: Optimized for quick planing and getting on top of the water faster, which is crucial for skiers and bass anglers rushing to the next spot.
Sportier Performance: Features a performance-geared gearcase and is often lighter, contributing to its agile feel.
Ideal Use Cases: Bass boats, ski/wake boats, and any performance-oriented fishing platform where every ounce of speed and quickness counts.

Key Differences at a Glance

Feature	Mercury 115 FourStroke	Mercury 115 Pro XS
Horsepower	115 HP	115 HP (with a higher RPM band)
Weight (20″ Shaft)	~377 lbs (171 kg)	~377 lbs (171 kg)
Full Throttle RPM	5,000 – 6,000 RPM	5,800 – 6,400 RPM
Fuel Induction	Electronic Fuel Injection	Electronic Fuel Injection
Best For	All-around use, family boating, fuel efficiency	High performance, bass fishing, skiing, acceleration

115 HP Mercury Outboard Price Breakdown: New vs. Used

Based on our analysis of current dealer networks and market data, understanding the true cost of a 115 HP Mercury requires looking beyond the base MSRP. Let’s dissect the pricing structure for both new and used markets.

New Outboard Pricing (2023-2024 Models)

The advertised base price for a new Mercury 115 FourStroke often starts in the low-to-mid $15,000 range. However, this is typically for the engine alone, a “black motor” without the premium paint schemes. The final price you pay can easily climb to $18,000 – $22,000+ once you factor in the essential components:

Propeller: The base engine often doesn’t include a prop. A quality stainless steel propeller can add $500 – $1,200.
Control System: You’ll need a binnacle or side-mount control. Digital throttle and shift (DTS) commands a premium over mechanical controls.
Gauges: Basic gauges are often included, but a full VesselView display is an upgrade.
Rigging Kit: Cables, wiring harnesses, and necessary hardware add to the cost.
Power Steering: This is a significant upgrade but is standard on many models. If not, it’s a crucial add-on for larger boats.

Always get a detailed, itemized quote from your dealer that includes all necessary rigging components.

Used Outboard Market Analysis

The used market can offer significant savings, but it requires diligence. Prices are highly dependent on age, hours, condition, and maintenance history.

Lightly Used (1-3 years old): Expect to pay $12,000 – $16,000. These engines often have significant remaining factory warranty.
Older Models (4-8 years old): Prices range from $8,000 – $12,000. Condition and service records are paramount here.

Expert Tip: What to Look For When Buying Used

Before committing to a used 115 hp Mercury outboard for sale, always follow this checklist:

Service History: Request all maintenance records. Regular oil changes and lower unit service are non-negotiable.
Compression Test: A mechanic should perform a compression test on all cylinders. The readings should be strong and within 10% of each other.
Lower Unit Oil Inspection: Drain a small amount of gear oil into a clear container. Look for metal shavings (a sign of wear) or a milky appearance (indicating water intrusion).
Visual Inspection: Check for significant corrosion, especially around the powerhead and lower unit. Look for cracks in the mounting brackets or cavitation plate.
Computer Diagnostics: A Mercury dealer can plug in a computer to read the engine’s internal data, including total run hours and any stored fault codes.

Key Features & Innovations: Why Choose a Mercury 115?

You’re investing in more than just horsepower; you’re investing in technology, durability, and peace of mind. Here’s a look at the engineering that makes the Mercury 115 series stand out.

Advanced Fuel Efficiency

Mercury’s 115hp engines are marvels of efficiency. The FourStroke models utilize Variable Valve Timing (VVT), which optimizes the engine’s breathing across different RPMs. This means you get strong, low-end torque for getting on plane without sacrificing top-end efficiency. The result is more miles per gallon and longer range, allowing you to spend more time enjoying the water and less time worrying about fuel.

Smooth and Quiet Operation

From the moment you turn the key, the difference is audible. Mercury employs extensive sound-dampening engineering, including a tuned intake system and a isolated powerhead. Combined with a clean-sheet gearcase design that reduces vibration, the 115 hp Mercury provides one of the quietest and smoothest rides in its class. This enhances passenger comfort and reduces fatigue on long journeys.

Advanced Corrosion Protection

Saltwater or freshwater, Mercury builds its engines to last. The 115 hp outboards feature a multi-step corrosion protection system, including:
* Anti-Corrosion Paint: A durable, saltwater-resistant finish.
* Stainless Steel Components: Used on critical fasteners and fittings.
* Cathodic Protection: Sacrificial anodes protect vulnerable metals from galvanic corrosion.

SmartCraft Digital Technology

This is where Mercury truly separates itself. SmartCraft is an integrated digital platform that allows you to monitor and manage your engine with precision.
* Digital Throttle & Shift (DTS): Provides smooth, precise, and effortless control with the push of a button or lever.
* VesselView Mobile/Display: See real-time data like fuel flow, RPM, engine hours, trim position, and system diagnostics right on your smartphone or a dedicated display.
* System Monitoring: Get immediate alerts for low oil pressure or overheating, helping you prevent minor issues from becoming major repairs.

Where to Buy Your 115 HP Mercury Outboard

Finding the right seller is as important as finding the right engine. Here are your primary options, each with its own pros and cons.

Authorized Mercury Dealers (The Best Option for New)

This is the recommended route for purchasing a new engine. The benefits are substantial:
* Full Factory Warranty: Protect your investment with Mercury’s comprehensive 3-year limited warranty.
* Professional Rigging: Proper installation is critical for performance and longevity. Dealers have certified technicians.
* Financing & Packages: Many dealers offer financing options and can package the engine with a new boat.
* Future Service Support: Establishing a relationship with a local dealer simplifies future maintenance and warranty claims. You can start your search for a trusted partner on our Mercury Dealer Network page at https://hidea-outboardmotor.com/mercury-dealer-network.

Reputable Online Marketplaces (For Used Engines)

Platforms like Boattrader, Facebook Marketplace, and The Hull Truth can be sources for used engines.
* Pros: Wide selection, potential for good deals.
* Cons: High risk. Always verify the seller’s reputation and be cautious of deals that seem too good to be true. Insist on a pre-purchase inspection by a qualified mechanic.

Direct from Boat Manufacturers

If you’re buying a new boat, the outboard is often part of the package. This can be a seamless and sometimes cost-effective way to acquire your 115 hp Mercury, as the rigging is handled entirely by the boat builder.

Essential Considerations Before You Buy

Demonstrating real-world expertise means addressing the practical concerns that go beyond the initial purchase.

Matching the Outboard to Your Boat

Horsepower is only one factor. You must ensure the engine is physically and functionally compatible with your vessel.
* Transom Weight Rating: The 115 hp Mercury weighs around 377 lbs. Your boat’s transom must be rated to handle this weight, especially when considering the dynamic forces of operation.
* Maximum Horsepower: Never exceed the maximum horsepower rating displayed on your boat’s capacity plate. This is a critical safety rule.

The True Cost of Ownership

The purchase price is just the entry fee. Budget for the ongoing costs of responsible ownership:
* Annual Maintenance: This includes engine oil and filter changes, gear lube replacement, spark plugs, and water pump impeller service (typically every 2-3 years). Budget several hundred dollars per year.
* Winterization: If you live in a cold climate, proper winterization is essential to prevent freeze damage.
* Insurance: Adding a new, high-value outboard to your policy will increase your premium.

Warranty & Service Support

A new Mercury outboard comes with a strong 3-year non-transferable limited warranty. For a used engine, check if the warranty is still active and if it’s transferable to a new owner. The presence of a valid warranty significantly increases the value and security of a used purchase. Having access to a certified Mercury technician for complex diagnostics and repairs is invaluable.

Frequently Asked Questions (FAQ)

Q: What is the difference between the Mercury 115 FourStroke and the 115 Pro XS?
A: The Pro XS is a high-performance variant with a higher RPM range and features tuned for acceleration and top speed, while the standard FourStroke is optimized for all-around reliability and fuel economy.

Q: How much does it cost to install a new 115 HP Mercury outboard?
A: Professional rigging and installation can cost between $1,000 and $2,500, depending on the boat’s complexity and the need for new controls or gauges. This is a separate cost from the engine itself.

Q: What is the fuel consumption of a 115hp Mercury outboard?
A: At a cruising speed of ~4000 RPM, you can expect approximately 5-7 gallons per hour. Fuel use varies significantly based on boat type, load, and conditions. The engine is most efficient at its ideal cruising RPM.

Q: Is a 115 HP Mercury outboard a good engine?
A: Yes. Mercury is renowned for its reliability, innovation, and strong dealer network. The 115hp is a popular and well-regarded engine size known for its perfect balance of power, efficiency, and smooth operation for a wide range of boats.

Q: What is the weight of a 115 HP Mercury outboard?
A: The weight is approximately 377 lbs (171 kg) for the 20-inch shaft model, making it a relatively lightweight and compact engine for its power class, which is beneficial for boat performance and balance.

Conclusion & Call to Action (CTA)

Choosing the right 115 hp Mercury outboard for sale boils down to aligning the engine’s strengths with your boating lifestyle and budget. Whether you choose the versatile FourStroke or the spirited Pro XS, you’re investing in a legacy of quality and innovation.

Your final piece of expert advice: Always get a professional survey or inspection for a used engine, and prioritize building a relationship with a certified Mercury dealer for long-term peace of mind. Their expertise in rigging and service is an invaluable part of the ownership experience.

Ready to find your perfect 115 HP Mercury? Use our Dealer Locator Tool at https://hidea-outboardmotor.com/dealer-locator to get an exact quote from an authorized dealer near you and take the first step toward unlocking your next adventure on the water.