Ever feel like your Mercury 115 Pro XS engine is holding back? That amazing power is there, but something just isn’t connecting on the water. Choosing the right propeller feels like a guessing game, right? You want the best speed, the best fuel economy, and that perfect hole shot, but the wrong prop can leave you frustrated and underperforming. It’s tough knowing which pitch, diameter, and blade count truly unlock the potential of your powerful engine.
We know the struggle. Getting the perfect match for your Mercury 115 Pro XS means the difference between a good day on the water and a fantastic one. This detailed guide cuts through the confusion. We break down exactly what you need to consider—from boat weight to desired performance goals—so you stop wasting money on props that just don’t fit.
Stick with us, and you will learn the secrets to selecting the ideal propeller. By the end of this post, you’ll have the confidence to order the propeller that makes your 115 Pro XS sing. Let’s dive into finding the perfect spin for your setup!
Top Prop For Mercury 115 Pro Xs Recommendations
- 1.Size & Materia: 13 Diameter x 19 Pitch Tooth:15 Spline Tooth ; Rotation: Right ; Blade: 3;Material: Upgrade Aiuminum Part number:48-77346A45
- 2.Replace Your Prop: OEM ones for Mercury Outboard Engines 40-140HP 4.25" Gearcase good choice as a back up for your boating or fishing
- 3.Outstanding Quality: Based on strict quality control ,our propellers are extremely durable without sacrificing top speed,acceleration or rmps,reduce the wear and tear on your engine and fully-fuel efficiency. Better speed and save money for you!
- 4.Sold As Seen In Pictures: Interchangeable hub, hardwares are included:forward thrust washer,aft adaptor,tab washer and propeller nut; Fit your boat well and easy to install
- 5.Service Commitment: We offer 12 months free replacement for blades fracture and bush slipping. Except normal wear, accidental damage, modification, improper installation
- 1.SPECIFICATION: Diameter: 13in | Pitch: 17in | Blade: 4 | Tooth: 15 | Rotation: Right | Material: Alloy-Aluminum Replace OEM:48-8M8026590
- 2.REPLACE YOUR PROP: OEM ones for Mercury Outboard Engines 40-140HP 4.25" Gearcase good choice as a back up for your boating or fishing
- 3.OUTSTANDING QUALITY: Based on strict quality control ,our propellers are extremely durable without sacrificing top speed,acceleration or rmps,reduce the wear and tear on your engine and fully-fuel efficiency. Better speed and save money for you!
- 4.HUB KITS INCLUDED: Interchangeable hub, hardwares are included:forward thrust washer, drive sleeve, aft adaptor,tabwasher and propeller nut; Fit your boat well and easy to install
- 5.QUALITY GURANTEE: We warranty the quality, Don't be limited by policy. We provide 12 months free replacement for blades fracture and bush slipping Except normal wear, accidental damage, modification, improper installation
- 1.SPECIFICATION: Diameter: 13in | Pitch: 21in | Blade: 3 | Tooth: 15 | Rotation: Right | Material: Alloy-Aluminum
- 2.REPLACE YOUR PROP: OEM ones for Mercury Outboard Engines 40-140HP 4.25" Gearcase good choice as a back up for your boating or fishing
- 3.OUTSTANDING QUALITY: Based on strict quality control ,our propellers are extremely durable without sacrificing top speed,acceleration or rmps,reduce the wear and tear on your engine and fully-fuel efficiency. Better speed and save money for you
- 4.HUB KITS INCLUDED: Interchangeable hub, hardwares are included:forward thrust washer, drive sleeve, aft adaptor,tabwasher and propeller nut; Fit your boat well and easy to install
- 5.QUALITY GURANTEE: We warranty the quality, Don't be limited by policy. We provide 12 months free replacement for blades fracture and bush slipping. (Except normal wear, accidental damage, modification, improper installation
- ★Size & Model: 13 1/4Diamater x 17 Pitch 3 Blades ,OEM Parts No.48-77344A45,For Mercury Outboard Engines40-140HP, Mercruiser Alpha One; 15 Spline Tooth Outboard Propellers,13.25 x17p
- ★Material & Characteristic: High Quality Aluminum,Vacuum Casting，Five-layer Propeller surface processing;The heat-treated paddle blade has high toughness and is not easy to break
- ★Outstanding Quality: Based on strict quality control ,our propellers are extremely durable without sacrificing top speed,acceleration or rmps,reduce the wear and tear on your engine and fully-fuel efficiency. The heat-treated paddle blade has high toughness and is not easy to break; Better speed and save money for you!
- ★Sold As Seen In Pictures:Propeller comes exactly as picture showing ; 835257Q1 Flo-Torq II Hub Kits Included:forward thrust washer, drive sleeve, aft adaptor,tabwasher and propeller nut,fit for Props well;Easy and convenient to install,Good choice for replace the old or broken one and spare back up.
- ★Service Commitment: Our outboard propeller provides comprehensive service measures (except for normal wear and tear, accidental damage, modification, improper installation), if you have any questions you can contact us, we will give you an answer within 24 hours according to your needs!
- 1.SPECIFICATION: Diameter: 13in | Pitch: 19in | Blade: 3 | Tooth: 15 | Rotation: Right | Material: Alloy-Aluminum Replace OEM:48-8M8026590
- 2.REPLACE YOUR PROP: OEM ones for Mercury Outboard Engines 40-140HP 4.25" Gearcase good choice as a back up for your boating or fishing
- 3.OUTSTANDING QUALITY: Based on strict quality control ,our propellers are extremely durable without sacrificing top speed,acceleration or rmps,reduce the wear and tear on your engine and fully-fuel efficiency. Better speed and save money for you!
- 4.HUB KITS INCLUDED: Interchangeable hub, hardwares are included:forward thrust washer, drive sleeve, aft adaptor,tabwasher and propeller nut; Fit your boat well and easy to install
- 5.QUALITY GURANTEE:Don't be limited by policy. We offer 12 months free replacement for blades fracture and bush slipping. Except normal wear, accidental damage, modification, improper installation
- Compatible with Chrysler / Force, Honda, Johnson/Evinrude. Please verify your OEM part number from your original unit to help ensure fitment. / For proper installation, these Universal Rubex propellers require a RBX Hub Kit, which is available separately. The RBX Hub Kit required will vary depending on your engine model.
- Replaces: Product Type: Propeller / Manufacturer Part Number: 9411-135-15 / Oem Interchange Part Number 1: 101032 / Oem Interchange Part Number 2: 11002 / Oem Interchange Part Number 3: 21401311 / Oem Interchange Part Number 4: 21411511 / Oem Interchange Part Number 5: 31041 / Oem Interchange Part Number 6: 391198 / Hp: 40-140 Hp / Diameter: 13.5 / Pitch: 15 / Blades: 3 / Construction: Aluminum / Rotation: Right Hand / Note: Rubex 3 /
- Applications: This Item Fits Various Applications By Part Number. Please Check Your Part Number To Ensure Fitment. / Mercury Optimax 15 Spline 115 40-140 Hp 2007 2008 2009 2010 2011 2012 2013 2014 / Mercury Optimax 15 Spline 125 40-140 Hp 2011 2012 2013 2014 / Mercury Optimax 15 Spline 75 40-140 Hp 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 / Mercury Optimax 15 Spline 90 40-140 Hp 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 / Mercury Pro Xs 15 Spline 115 40-140 Hp 2017 2018
- Applications: 2021 / Mercury Sea Pro 15 Spline 140 40-140 Hp 1978 1979 1980 1981 / Mercury Sea Pro 15 Spline 75 40-140 Hp 2014 2015 2016 2017 2018 2019 2020 2021 / Mercury Sea Pro Ct 15 Spline 40 40-140 Hp 2014 2015 2016 2017 2018 2019 2020 2021 / Mercury Sea Pro Ct 15 Spline 60 40-140 Hp 2014 2015 2016 2017 2018 2019 2020 2021 / Mercury W/Command Thrust 15 Spline 40 40-140 Hp 2014 2015 2016 2017 2018 2019 2020 2021 / Mercury W/Command Thrust 15 Spline 50 40-140 Hp 2014 2015 2016 2017 2018
- Propeller Source: Aftermarket
- 1.SPECIFICATION: Diameter: 13.5in | Pitch: 15in | Blade: 3 | Tooth: 15 | Rotation: Right | Material: Alloy-Aluminum
- 2.REPLACE YOUR PROP: OEM ones for Mercury Outboard Engines 40-140HP 4.25" Gearcase good choice as a back up for your boating or fishing
- 3.OUTSTANDING QUALITY: Based on strict quality control ,our propellers are extremely durable without sacrificing top speed,acceleration or rmps,reduce the wear and tear on your engine and fully-fuel efficiency. Better speed and save money for you!
- 4.HUB KITS INCLUDED: Interchangeable hub, hardwares are included:forward thrust washer, drive sleeve, aft adaptor,tabwasher and propeller nut; Fit your boat well and easy to install
- 5.QUALITY GURANTEE: Don't be limited by policy. We offer 12 months free replacement for blades fracture and bush slipping. Except normal wear, accidental damage, modification, improper installation
- 1.SPECIFICATION: Diameter: 13in | Pitch: 19in | Blade: 4 | Tooth: 15 | Rotation: Right | Material: Alloy-Aluminum
- 2.REPLACE YOUR PROP: OEM ones for Mercury Outboard Engines 40-140HP , 4.25" Gearcase good choice as a back up for your boating or fishing
- 3.OUTSTANDING QUALITY: Based on strict quality control ,our propellers are extremely durable without sacrificing top speed,acceleration or rmps,reduce the wear and tear on your engine and fully-fuel efficiency. Better speed and save money for you!
- 4.HUB KITS INCLUDED: Interchangeable hub, hardwares are included:forward thrust washer, drive sleeve, aft adaptor,tabwasher and propeller nut; Fit your boat well and easy to install
- 5.QUALITY GURANTEE: Don't be limited by policy. We provide 12 months free replacement for blades fracture and bush slipping. Except normal wear, accidental damage, modification, improper installation
Choosing the Right Propeller for Your Mercury 115 Pro XS: A Buyer’s Guide
Finding the correct propeller for your Mercury 115 Pro XS outboard engine makes a huge difference. The right prop helps your boat go faster and use less fuel. The wrong one can hurt your engine. This guide helps you select the best propeller.
Key Features to Look For
When shopping for a prop, look closely at these important features. They tell you how the propeller will perform on your boat.
1. Diameter and Pitch
These two numbers are critical. Diameter is how wide the propeller spins. Pitch is how far the boat moves forward in one full turn. For the 115 Pro XS, you need to match these specs to your boat’s weight and the type of boating you do. Higher pitch usually means higher top speed. Lower pitch helps you get on plane faster (acceleration).
2. Blade Count
Most props come with three or four blades. Three-blade props usually offer better top-end speed. Four-blade props often give better hole shot (quick take-off) and handle rough water better. They also run quieter.
3. Rotation Type
Your Mercury engine needs the correct rotation. Most modern outboards use “Right-Hand” or standard rotation. Always check your engine manual to confirm. Using the wrong rotation will cause poor performance or engine damage.
Important Materials Matter
The material your propeller is made from affects its strength and cost.
- Aluminum: These are the most common and affordable. They work well for general use. However, aluminum can bend or chip easily if you hit rocks or debris.
- Stainless Steel: Stainless steel props are much stronger. They resist corrosion better and hold their shape even under high stress. They cost more upfront but last longer, especially if you run in rough water often.
Factors That Improve or Reduce Quality
Good propellers are designed carefully. Poor design leads to wasted power.
Factors That Improve Quality:
Look for props with high-quality blade shapes and finishes. Well-designed **rake** (the angle of the blade) helps push water efficiently. **Cupping** (small lips on the trailing edge of the blade) helps hold the boat up and reduces ventilation (air being sucked into the prop).
Factors That Reduce Quality:
Cheaply made props often have poor blade balancing. An unbalanced prop causes vibrations that wear out your engine bearings faster. Also, props with thin, poorly finished edges lose efficiency quickly.
User Experience and Use Cases
Think about where and how you use your boat. This determines the best prop choice.
If you pull wakeboarders or heavy skiers, you need a prop that excels at acceleration. You should choose a lower pitch aluminum or a four-blade stainless steel prop. If you cruise long distances on open water, a higher pitch prop will give you better fuel economy at cruising speed.
For smaller, lighter aluminum fishing boats, standard three-blade aluminum props often work perfectly fine. For heavy bay boats or center consoles, the strength of stainless steel is usually worth the extra money.
Frequently Asked Questions (FAQ) About Mercury 115 Pro XS Propellers
Q: How do I know the correct pitch for my 115 Pro XS?
A: You must know your boat’s full weight, the gear ratio of your lower unit, and your maximum safe engine RPM (usually listed on the engine sticker). A dealer or prop specialist can help you calculate this, or you can start with the factory-recommended size and adjust up or down based on your WOT (Wide Open Throttle) performance.
Q: Can I use a propeller from a different brand on my Mercury?
A: Yes, many brands make props that fit Mercury outboards. Ensure the hub kit matches your specific engine model. The hub kit connects the prop shaft to the propeller itself.
Q: What is “ventilation” and how does the prop affect it?
A: Ventilation happens when the propeller spins fast enough to suck air down from the surface, causing the engine RPM to jump suddenly. Props with good cup designs help keep the blades submerged, which reduces ventilation, especially in turns.
Q: Should I choose stainless steel over aluminum for better performance?
A: Stainless steel generally allows for thinner blades, which cut through the water with less drag, leading to slightly better top-end performance and durability. Aluminum is cheaper but sacrifices some durability.
Q: What happens if my WOT RPM is too high or too low?
A: If your WOT RPM is too high, your pitch is too low, meaning you need a prop that makes the engine work harder (higher pitch). If your WOT RPM is too low, your pitch is too high, and the engine cannot reach its maximum safe speed.
Q: Does blade count affect fuel economy?
A: Generally, four-blade props can sometimes offer slightly better fuel economy at cruising speeds because they create less slip (wasted energy) than three-blade props in certain applications.
Q: What is the recommended maintenance for my new propeller?
A: Always inspect your prop after hitting debris. Clean off barnacles or slime regularly. For aluminum props, check for nicks. For stainless steel, check the leading edges for damage that might cause vibration.
Q: What is the “hub kit”?
A: The hub kit is the insert that fits between the propeller shaft and the propeller. It includes splines and spacers. You must use the correct hub kit for your specific Mercury gear case.
Q: Is it better to buy a used propeller?
A: It is risky. If a used propeller has unseen bends or repairs, it might cause severe vibration. For an expensive engine like the 115 Pro XS, buying a new or professionally reconditioned prop is usually safer.
Q: What does “cupping” mean on a propeller?
A: Cupping refers to the small, curved edge built onto the back of the propeller blades. This feature helps the prop grip the water better, especially at high speeds, improving lift and efficiency.