If you want your Mercury 115 4-Stroke to perform at its peak, selecting the right propeller is your first step to improving speed, stability, and fuel economy.
A good propeller not only affects speed but also improves fuel efficiency, helps with hole shot (quick acceleration), and ensures better stability in rough waters.
With so many options on the market, it can be overwhelming to find the perfect fit for your Mercury 115. Should you go for aluminum or stainless steel? A 3-blade or 4-blade design? What’s the ideal pitch for your boat?
That’s where we come in. After extensive research and expert reviews, we’ve rounded up the best prop for Mercury 115 4 stroke, breaking down their key features, pros, and performance benefits.
For example, the Spitfire 4-Blade 13×17″ is the best choice for stability and control in rough water, ideal for choppy conditions and heavier boats.
On the other hand, the Spitfire 4-Blade 13.4 x 15″ is designed for towing, watersports, and carrying heavy loads.
Whether you’re into fishing, watersports, cruising, or speed-focused boating, we’ll help you find the perfect propeller to match your needs.
Keep reading to discover the best propeller to maximize your Mercury 115’s power and efficiency.
Top 4 Best Prop for Mercury 115 4 Stroke – In-Depth Reviews
We’ve chosen these 4 highly-rated propellers based on real-world performance and feedback. Each one offers excellent value and durability.
Let’s explore which propeller will best suit your needs: top speed, efficiency, or stability.
1. Spitfire 4-Blade 13×17″ Pitch
Best for Stability & Rough Water
If you’re looking for a propeller for your Mercury 115 4-Stroke that offers exceptional stability and better control in rough water, the Spitfire 4-Blade 13×17″ is a top choice. This is the top choice for boaters who often navigate choppy or turbulent conditions.
Its 4-blade design and 15-tooth spline offer better control and smoother transitions in unpredictable water. Additionally, it’s quite easy to install and has top-notch speed with quick acceleration.
It features a simple and quick installation, with most users reporting setup in 10-20 minutes.
Thanks to its faster planing and improved responsiveness, boaters have noticed a significant difference in handling, especially in choppy or turbulent conditions.
Performance
The Spitfire 4-Blade 13×17″ is known for its exceptional hole shot, which allows boats to plane faster at lower speeds.
According to user reviews, this propeller improves handling stability by up to 20% compared to standard 3-blade designs.
Many boaters have noticed smoother rides in windy and wavy conditions, thanks to its increased blade surface area.
Additionally, it reduces slippage and provides a better grip on the water. If you need enhanced control in rough conditions, this one delivers noticeable performance gains in acceleration and stability.
Key Features
- Faster hole shot for rapid acceleration.
- Improved cruising efficiency at moderate speed.
- Excellent low-speed planing.
- Enhanced stability in rough or choppy water.
Why We Picked It?
If you boat with heavy loads in rough water, the Spitfire 4-Blade 13×17″ is for you. It offers a smooth ride with better control, comfort, and safety.
If you frequently boat with heavy loads in rough water, the Spitfire 4-Blade 13×17″ is one of the best choices for your Mercury 115 4-Stroke.
Thanks to its larger blade surface area, it delivers up to 15% better grip on the water and reduces slippage.
Overall, it improves the handling and stability. Users have reported smoother rides in choppy conditions and less bow rise during acceleration.
2. Black Max 3-Blade 13.25×17″
Best for Top Speed
If you’re looking to get the most potential of your Mercury 115 4-Stroke in open water, this 3-blade prop delivers impressive performance.
This 3-blade propeller is all about maximizing speed and efficiency. It cuts through the water efficiently, offering a smooth, fast ride without compromising fuel economy.
If you’re looking to get the most potential out of your Mercury 115 4-Stroke in open water, this 3-blade propeller delivers impressive performance. It can reach 44 MPH at 6000 RPM.
Performance
This is ideal for cruising at 29-30 MPH. The 3-blade offers exceptional performance at mid to high speeds.
It strikes a perfect balance between speed and fuel efficiency, which makes it ideal for boaters who love to spend time in open water.
Key Features
- Great for smooth cruising at 29-30 MPH.
- Efficient fuel consumption at cruising speeds.
- 44 MPH at 6000 RPM for top speed.
- Lightweight design for better speed handling.
Why We Picked It?
For boaters who are focused on achieving maximum speed with efficiency, the Black Max 3-Blade propeller is the top choice. It provides exceptional speed without any trade-off.
We chose the Black Max 3-Blade 13.25×17″ because tests have shown that this propeller can achieve a top speed of 41.9 mph at 5,766 RPM, with a maximum fuel economy of 6.09 mpg at 3,250 RPM and 22.0 mph.
Its lightweight aluminum build minimizes drag, while its precision-balanced blades reduce vibration for a noticeably smoother ride.
Therefore, if you’re looking for faster hole shots while maintaining high speeds with lower fuel consumption, this one stands out as a reliable performer.
3. Spitfire 4-Blade 13.4 x 15″ Prop
Best for Towing & Heavy Loads
The Spitfire 4-Blade 13.4 x 15″ propeller is designed for heavy loads and towing. It’s the best for boaters who enjoy water sports or need to pull wakeboards, tubes, or skiers.
This one is famous for its excellent hole shot and the necessary torque to lift heavy loads.
Performance
Switching from a 3-blade to the Spitfire 4-blade prop noticeably improved holeshot, reduced time to plane, and made handling sharper and more responsive, especially at lower speeds.
Most users reported only a small loss of 1–3 mph in top-end speed, but agreed the benefits in acceleration and control were well worth it. Boats could plane at lower speeds, making skiing, tubing, and heavy loads much easier to manage.
Key Features
- Rapid hole shot for towing or water sports.
- Ideal for low-speed planing.
- Perfect to pull and handle heavy loads.
- Offers solid performance for recreational boats.
We Picked It?
If you’re into towing or water sports, the Spitfire 13.4 x 15″ propeller is perfect for you. With the ability to handle heavy loads along with rapid acceleration, it’s ideal for recreational purposes and sports enthusiasts.
If you need a propeller that excels in towing, hauling heavy loads, and water sports, the Spitfire 4-Blade 13.4 x 15″ is a standout choice.
Overall, the Spitfire 4-blade delivered stronger pull, quicker jumps onto plane, and better cornering without overworking the engine.
4. Quicksilver Nemesis 4-Blade 14 x17” Prop
Best for Performance & Durability
The Quicksilver Nemesis 4-Blade 14 x 17″ propeller is manufactured to deliver outstanding performance and long-lasting durability.
This propeller is perfect for boaters demanding superior handling and high performance in calm and rough water.
This propeller is great for boaters who need better control and strong performance in both calm and rough water.
Performance
With its 4-blade design, the Quicksilver Nemesis has 16-25% faster acceleration and superior handling with no penalty in top speed.
It’s especially great for boaters who need a propeller that can tackle various conditions, from high-speed runs to towing. A reliable and all-around performer.
Its advanced design ensures precise handling, which makes it ideal for both high-speed cruising and towing.
Whether you’re navigating choppy waters or pulling a wakeboard, this prop provides consistent and reliable performance.
Key Features
- Built with high-quality casting and a durable, high-gloss Phantom Black finish.
- 4-blade design for enhanced acceleration and stability.
- Great for towing and water sports.
- Excellent for medium to high-speed cruising.
- Designed for better fuel efficiency at high speeds.
Why We Picked It?
The Quicksilver Nemesis 4-Blade 14 x 17″ is our top choice for boaters looking for a high-performance propeller that balances durability, speed, and efficiency.
It’s ideal for boaters who want a multi-purpose propeller capable of handling a variety of boating activities with zero compromise on performance.
Unlike many 4-blade propellers, it maintains top speed without sacrificing fuel efficiency, a well-balanced performer for both speed and control.
Its high-gloss Phantom Black finish enhances durability compared to standard aluminum propellers.
Quick Comparison Table – Best Propellers for Mercury 115 4-Stroke
Here comes a quick comparison table to help you make an informed decision.
| Propeller Name | Performance | Pitch | Hole Shot | Price |
| Spitfire 4-Blade 13×17″ | Outstanding | 17″ | Excellent | Check on Amazon |
| Black Max 3-Blade 13.25×17″ | Outstanding | 17″ | Good | Check on Amazon |
| Spitfire 4-Blade 13.4 x 15“ | Outstanding | 15″ | Best | Check on Amazon |
| Quicksilver Nemesis 4-Blade 14 x17″ | Average | 17″ | Very Good | Check on Amazon |
How to Choose the Best Prop for Mercury 115 4-Stroke (Buyer’s Guide)
Choosing the right propeller for your Mercury 115 4-Stroke engine is essential for the best performance on the water. Let’s break down the key factors that will help you pick the best propeller for your needs.
1. 3-Blade vs. 4-Blade – Which One is Better?
The first decision you’ll face is whether to go with a 3-blade or a 4-blade propeller. Both have distinct benefits depending on your boating needs:
- 3-Blade Propeller
Best for top speed and fuel efficiency. If you’re looking to maximize your speed and get the most out of your Mercury 115 4-Stroke on calm waters, a 3-blade is a solid choice.
- 4-Blade Propeller
Best for a better hole shot and stability. A hole shot means quick acceleration. If you spend time in rough waters or need improved acceleration, a 4-blade propeller is the way to go. With extra blades, it provides a better grip in the water and offers super stability.
2. Understanding Pitch & Diameter
Next up, it’s time to consider pitch and diameter. These two factors influence your boat’s acceleration, top speed, and fuel efficiency:
Lower Pitch (15″- 17″)
A lower pitch means your boat accelerates fast, and is an ideal option for water sports or towing. It’s also ideal for those who need low-speed power.
Higher Pitch (19″+)
A higher pitch means your boat can reach a higher top speed with enhanced fuel economy at cruising speeds. However, the trade-off is slow acceleration and struggling in rough water with heavy loads, especially with a smaller engine like the Mercury 115.
Diameter
Diameter is the width of the circle created by the propeller blades’ rotation. It affects how much water the propeller pushes.
- Larger diameter = More power & grip (good for heavy loads).
- Smaller diameter = Faster top speed & efficiency.
3. Aluminum vs. Stainless Steel Propellers
Now, let’s talk material. Both aluminum and stainless steel propellers are commonly used, but they each have their strengths:
Aluminum
Aluminum is a great choice for those who are looking for an affordable, lightweight option. These are perfect for casual boaters and those who don’t need extreme performance.
Stainless Steel
For those seeking maximum performance and durability, stainless steel is the way to go. These are more durable and can handle higher RPMs without compromising performance.
Stainless steel propellers are ideal for performance-focused boats. They offer better acceleration, higher top speeds, and better fuel efficiency under demanding conditions.
4. Best Propeller Size for Mercury 115 4-Stroke (Ideal Specs)
The right propeller size is key to getting the performance you want. Here are the most common sizes for the Mercury 115 4-Stroke, and what is best for:
13.25 x 15″: Ideal for low-speed acceleration and towing. Great for water sports or boats with heavier loads.
13.25 x 17″: Perfect for balanced performance. It offers a good mix of speed and fuel economy. If you plan on doing a variety of activities, this is the go-to size.
13.25 x 19″: If you’re after top-notch speed and improved fuel economy at cruising speeds, this size works best. However, it might struggle with quick acceleration or heavy loads.
While Mercury 115 HP benefits from both 3-blade and 4-blade propellers, you might also want to explore the Top 5 Best Propellers for Mercury 90 HP 2-Stroke for a different perspective on performance and efficiency in a similar category.
FAQs
How do I know if I need a new propeller for my Mercury 115 HP 4-Stroke?
You may need a new propeller if you notice:
- Visible damage, like chipped or cracked blades.
- Reduced top speed compared to previous operations.
- Slower acceleration or trouble with planning.
- Poor fuel efficiency or increased fuel consumption.
- Higher RPMs without an increase in speed.
Can I switch from a 3-blade to a 4-blade prop on my Mercury 115 HP?
Yes, you can switch from a 3-blade to a 4-blade prop on your Mercury 115 HP. Switching to a 4-blade propeller can improve stability, acceleration, and handling in rough water. However, you may lose a bit of top-end speed compared to a 3-blade.
How fast can a Mercury 115 HP 4-Stroke go?
If you match the propeller with a Mercury 115 HP 4-Stroke, it can reach speeds of 42-50 MPH. A higher pitch prop (17”- 19”) helps maximize top speed, while a lower pitch (15”-17”) improves acceleration but may reduce top speed.
What is the recommended RPM range for a Mercury 115 HP 4-Stroke?
Your Mercury 115 HP 4-Stroke should run best between 5,000 – 6,000 RPM at full throttle.
- If it’s over 6,000 RPM → Your propeller pitch is too low (too easy to spin). Try a higher pitch to bring RPM down.
- If it’s under 5,000 RPM → Your prop pitch is too high (too hard to spin). Go for a lower pitch to help your boat move better.
What is the best prop for rough water conditions?
A 4-blade propeller (like the Mercury Spitfire series) is ideal for rough water. It offers:
- Better grip and stability, reducing slip.
- Smoother handling with more comfort.
- Improved low-speed control, preventing cavitation.
A 4-blade propeller, like the Mercury Spitfire series, is an excellent choice for rough water conditions. It provides better grip and stability with less slippage to ensure a smoother, more controlled ride.
The extra blade enhances handling and comfort, making it easier to navigate choppy waters with confidence.
Additionally, it improves low-speed control, which helps prevent cavitation and ensures steady performance, especially when maneuvering at slower speeds.
In Summary
Choosing the right propeller for your Mercury 115 HP 4-Stroke is key to unlocking its full potential. If you’re looking for maximum speed and fuel efficiency, the Black Max 13.25×17″ (3-blade) is a great choice.
On the other hand, if you need better control, smoother handling, and a stronger hole shot, the Spitfire 13×17″ (4-blade) is the way to go.
The best propeller depends on your boating style and water conditions. By selecting the right pitch, material, and blade configuration, you can improve your boat’s performance, responsiveness, and fuel economy.
Don’t settle for an average ride – upgrade now and experience the burst of acceleration!
