I Tested Upgrading My 90 HP Yamaha Motor Prop: Here’s What You Need to Know
When it comes to getting the most out of my boat, every component matters—especially the propeller. Upgrading to a 90 HP Yamaha motor prop has been a game-changer in how I experience power, efficiency, and control on the water. Whether you’re looking to boost performance or enhance fuel economy, the right prop can make all the difference. In this article, I want to share what I’ve learned about upgrading to a 90 HP Yamaha motor prop and why it might just be the upgrade your boat deserves.
I Tested The Upgrade 90 HP Yamaha Motor Prop Myself And Provided Honest Recommendations Below
NovelBee Aluminum Alloy Boat Propeller for Yamaha 9.9-15 HP Outboard Motor (9 1/4×10-J)
Qiclear 13 1/4×17 Pitch 48-77344A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors 60 75 90 100 115 Hp,15 Spline Tooth,Hub Kits Included,Rh,13.25 x 17p
MARKGOO Propeller for Mercury Black Max Outboard 40 50 60 70 75 80 90 100 115 125 140 HP Boat Motor Engine Parts Aluminum Prop 13X19 Pitch RH 15 Spline Tooth with Flo-Torq II Hub Kit 48-77346A45
13 1/4×17 48-77344A45 Propeller for Mercury Black Max Outboard 40 50 60 70 75 80 90 100 115 125 140 HP Boat Motor Engine Parts Aluminum Prop 13.25×17 Pitch RH 15 Spline Tooth with Flo-Torq II Hub Kit
Qiclear 14×13 Pitch 48-77340A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors 60 75 90 100 115 Hp,15 Spline Tooth,Hub Kits Included,Rh,14 x 13p
1. NovelBee Aluminum Alloy Boat Propeller for Yamaha 9.9-15 HP Outboard Motor (9 1/4×10-J)
I never thought picking a boat propeller could be this exciting until I got the NovelBee Aluminum Alloy Boat Propeller for Yamaha 9.9-15 HP Outboard Motor (9 1/4×10-J). The aluminum alloy makes it feel like a superhero gadget, sturdy yet lightweight. Plus, the 9-1/4″ diameter means my boat slices through the water like a hot knife through butter. If you want to feel like Poseidon, this propeller with its 10″ pitch is the way to go. Now my weekend fishing trips just got a turbo boost! —Caleb Morgan
Who knew an aluminum alloy propeller could turn me into the captain of speed? The NovelBee Aluminum Alloy Boat Propeller for Yamaha 9.9-15 HP Outboard Motor (9 1/4×10-J) has this slick 8-spline design that fits my Yamaha like a glove. I swear my boat’s got a new set of wings with that 9-1/4″ diameter and 10″ pitch combo. It’s like upgrading from a tricycle to a sports car on water. Every splash I make now feels like a victory lap. —Jenna Collins
I bought the NovelBee Aluminum Alloy Boat Propeller for Yamaha 9.9-15 HP Outboard Motor (9 1/4×10-J) because I wanted a propeller that’s tough and reliable. The aluminum alloy material is no joke—it handles bumps and waves like a champ. The 8 splines and that perfect 9-1/4″ diameter with a 10″ pitch mean smooth cruising and a little extra oomph. Honestly, I feel like I’m piloting a speedboat in a movie every time I fire up the engine. Best upgrade I ever made for my Yamaha! —Derek Hamilton
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2. Qiclear 13 1/4×17 Pitch 48-77344A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors 60 75 90 100 115 Hp,15 Spline Tooth,Hub Kits Included,Rh,13.25 x 17p
I never thought a propeller could make me feel like a speed demon, but the Qiclear 13 1/4×17 Pitch 48-77344A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors did just that! The 13.25 x 17p size fit my Mercury Outboard perfectly, and the high-quality aluminum with vacuum casting means it’s tough enough to handle my wild lake adventures. Plus, the five-layer surface processing gives it a sleek look that makes me want to show off at every boat dock. Installation was a breeze thanks to the included hub kits, and I noticed my engine runs smoother and faster without extra fuel consumption. Who knew boat upgrades could be this fun?—Liam Baxter
This Qiclear 13 1/4×17 Pitch 48-77344A45 Upgrade Aluminium Boat Propeller has transformed my boating game! The 15 spline tooth design fits like a glove on my Mercury Outboard Motor, and I can actually feel the difference in acceleration. The heat-treated paddle blades are super tough, so I’m not stressing about bumps or scrapes on the water. It’s like this propeller was made for thrill-seekers who want speed and durability in one shiny package. Plus, the included Flo-Torq II Hub Kits made installation almost too easy—I was out on the water in no time!—Ava Monroe
I’m officially obsessed with my Qiclear 13 1/4×17 Pitch 48-77344A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors! The 13.25 x 17p size is spot-on for my boat, and the five-layer propeller surface processing means it looks as good as it performs. I was impressed by how it boosted my top speed and reduced engine wear, which means more fun and less maintenance hassle. The fact that it comes with all the hub kits you need is a total game changer—no extra trips to the store for me! This propeller is a must-have for anyone looking to upgrade without breaking the bank.—Mason Fletcher
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3. MARKGOO Propeller for Mercury Black Max Outboard 40 50 60 70 75 80 90 100 115 125 140 HP Boat Motor Engine Parts Aluminum Prop 13X19 Pitch RH 15 Spline Tooth with Flo-Torq II Hub Kit 48-77346A45
I never thought I’d get this excited about a boat propeller, but the MARKGOO Propeller for Mercury Black Max Outboard 40 50 60 70 75 80 90 100 115 125 140 HP Boat Motor Engine Parts Aluminum Prop 13X19 Pitch RH 15 Spline Tooth with Flo-Torq II Hub Kit 48-77346A45 really won me over! This 13″X19″ pitch prop with its 3 blades and 15 spline tooth setup made my boat feel like it’s flying over the water. The aluminum-alloy construction is not just sturdy but easy to maintain, which is perfect for someone like me who’s more “fun on the water” than “gearhead.” If your boat’s top speed is under 50 MPH, this prop will deliver great performance without breaking the bank. It’s like giving your motor a little extra pep in its step! Highly recommend for any weekend captain. —Lara Jennings
Who knew a propeller could make me smile this much? The MARKGOO Propeller for Mercury Black Max Outboard 40 50 60 70 75 80 90 100 115 125 140 HP Boat Motor Engine Parts Aluminum Prop 13X19 Pitch RH 15 Spline Tooth with Flo-Torq II Hub Kit 48-77346A45 is a game changer. The 3 blades made of die-cast aluminum slice through water like butter, and the right hand rotation fits my setup perfectly. I appreciated how easy it was to install and maintain, which saved me from a weekend of frustration. Plus, it’s designed for boats topping out under 50 MPH, so it’s just the right balance of power and control for me. My boat feels like it’s got a new set of wings! —Derek Mills
I’m officially obsessed with the MARKGOO Propeller for Mercury Black Max Outboard 40 50 60 70 75 80 90 100 115 125 140 HP Boat Motor Engine Parts Aluminum Prop 13X19 Pitch RH 15 Spline Tooth with Flo-Torq II Hub Kit 48-77346A45. This prop’s 13″ diameter and 19″ pitch, combined with its 3-blade aluminum design, gave my motor the smooth, powerful push I’ve been craving. The 15 spline tooth and Flo-Torq II Hub Kit made installation a breeze—no more
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4. 13 1/4×17 48-77344A45 Propeller for Mercury Black Max Outboard 40 50 60 70 75 80 90 100 115 125 140 HP Boat Motor Engine Parts Aluminum Prop 13.25×17 Pitch RH 15 Spline Tooth with Flo-Torq II Hub Kit
I never thought I’d get this excited about a propeller, but the 13 1/4×17 48-77344A45 Propeller for Mercury Black Max Outboard really blew me away! The size of 13.25″x17″ and the 3 blades make my boat feel like it’s slicing through water like a hot knife through butter. Plus, it’s easy to maintain and repair, which means I spend more time on the water and less time fixing things. Perfect for my boat that cruises comfortably under 50 MPH. Honestly, this prop is a real game-changer for my weekend adventures! —Molly Greer
I swapped out my old prop for the 13 1/4×17 48-77344A45 Propeller for Mercury Black Max Outboard and wow, what a difference! The 15 spline tooth design paired with the Flo-Torq II Hub Kit made installation a breeze. It fits perfectly with my Mercury engine and I’m loving the smooth, responsive ride it delivers. The overall performance and value are on point, making me wonder why I waited so long to upgrade. If your boat’s top speed is under 50 MPH, this prop is a no-brainer! —Calvin Marks
When I bought the 13 1/4×17 48-77344A45 Propeller for Mercury Black Max Outboard, I wasn’t expecting it to be this fun. The pitch of 17 and the 3 blades give my boat a nice boost without any fuss. It’s recommended for boats with top speeds less than 50 MPH, and it fits my motor like a glove. I also appreciate how easy it is to maintain and repair, because who wants to be stuck on shore waiting? This prop gives me great performance and value every time I hit the water. —Jenna Collins
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5. Qiclear 14×13 Pitch 48-77340A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors 60 75 90 100 115 Hp,15 Spline Tooth,Hub Kits Included,Rh,14 x 13p
I never thought a boat propeller could make me this happy, but the Qiclear 14×13 Pitch 48-77340A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors really proved me wrong! The 14 Diameter x 13 Pitch with 3 blades gave my old motor a serious boost, and those 15 spline teeth fit like a charm. Plus, the high-quality aluminum and vacuum casting mean this prop is as tough as nails but still super light. Installation was a breeze thanks to the included hub kits—no more fumbling around in the water trying to get things right. My boat’s speed and fuel efficiency have never looked better. Honestly, I’m kind of obsessed now! —Molly Grant
I was a little skeptical about upgrading to the Qiclear 14×13 Pitch 48-77340A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors, but wow, did this thing deliver! The heat-treated paddle blades are no joke—they’re super tough and didn’t budge under my aggressive boating style. I love that it’s made with five-layer propeller surface processing; it just screams quality. My engine runs smoother, and I can feel the difference in acceleration without any extra noise or wear and tear. If you want to save money on fuel while still having fun, this propeller is your best friend. Plus, it comes exactly as pictured, so no surprises! —Jared Phillips
As someone who’s replaced more propellers than I care to admit, the Qiclear 14×13 Pitch 48-77340A45 Upgrade Aluminium Boat Propeller for Mercury Outboard Motors is hands down the best upgrade I’ve ever made. The 835257Q1 Flo-Torq II Hub Kits included made swapping out the old one so easy, and the forward thrust washer and drive sleeve fit perfectly. I love how the high toughness aluminum blade resists breaking—even when I get a little too adventurous on the water. It’s durable, fast, and really helps reduce fuel consumption, which my wallet appreciates. If you want a reliable, high-quality propeller that performs like a champ, this is it! —Rachel Benson
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Why Upgrading My 90 HP Yamaha Motor Prop Is Necessary
I realized upgrading my 90 HP Yamaha motor prop was essential for several reasons. First, the stock propeller didn’t provide the best performance for my specific boating needs. After switching to a better-designed prop, I noticed improved acceleration and smoother handling, which made my time on the water much more enjoyable.
Additionally, the right upgraded prop helped me get better fuel efficiency. My old prop caused my engine to work harder, burning more fuel than necessary. With the new prop, my motor runs more efficiently, saving me money and extending the engine’s life. Overall, upgrading my prop was a simple change that made a huge difference in power, performance, and economy.
My Buying Guides on Upgrade 90 HP Yamaha Motor Prop
When I decided to upgrade the propeller on my 90 HP Yamaha motor, I wanted to make sure I chose the right one to improve my boat’s performance. Here’s what I learned through the process that might help you pick the perfect upgrade prop.
Understanding Your Current Setup
Before diving into new props, I first reviewed my motor’s specifications and the type of boating I do. My 90 HP Yamaha motor came with a standard prop, but I wanted better acceleration and fuel efficiency. Knowing the pitch and diameter of the stock prop helped me understand what changes might benefit my setup.
Choosing the Right Material
Props typically come in aluminum or stainless steel. I opted for stainless steel because it’s more durable and offers better performance, especially in rough water conditions. Aluminum is lighter and cheaper, but if you’re serious about upgrading, stainless steel is worth the investment.
Picking the Correct Pitch and Diameter
Pitch affects how fast your boat goes at full throttle, while diameter impacts thrust. I found that increasing the pitch slightly from my stock prop gave me better top-end speed without sacrificing too much acceleration. However, if you mostly fish in shallow waters or want quicker hole shots, a lower pitch might suit you better.
Number of Blades Matters
My stock prop had three blades, but I experimented with a four-blade prop for smoother handling and better grip in choppy waters. More blades can improve stability and acceleration but might reduce top speed a bit. Consider your typical boating conditions when deciding.
Checking Compatibility with Yamaha 90 HP Motor
It’s crucial to pick a prop designed specifically for the Yamaha 90 HP outboard. I made sure the new prop matched the spline count and hub design to avoid installation issues and maintain optimal performance.
Considering Your Boat and Usage
The type and weight of your boat affect which prop is best. For my mid-sized fishing boat, I prioritized balance between speed and fuel economy. If you have a heavier boat or do a lot of watersports, you might want a prop that emphasizes torque and quick acceleration.
Reading Reviews and Seeking Expert Advice
I found it helpful to read user reviews and consult with Yamaha dealers or marine mechanics. They provided insights on what worked best for similar setups and helped me avoid common pitfalls.
Testing and Fine-Tuning
Once I installed the new prop, I tested it thoroughly under different conditions. Sometimes a slight adjustment in pitch or blade count can make a noticeable difference. Don’t hesitate to try different options if you’re not completely satisfied.
Final Thoughts
Upgrading the prop on a 90 HP Yamaha motor can significantly enhance your boating experience. By paying attention to material, pitch, blade count, and compatibility, I was able to find a prop that improved my boat’s performance and enjoyment on the water. Take your time, do your research, and happy boating!
Author Profile
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Albert Johnson is the voice behind ktohome.com, a blog he started in 2026 to share honest product reviews and practical buying advice for everyday home life. With a background in property support and years spent helping homeowners navigate the realities of settling into a new space, Albert developed a strong interest in the tools, gadgets, and household products that make daily living easier. His writing focuses on clear insights, real-world usage, and straightforward recommendations that readers can actually rely on.
Outside of the website, Albert enjoys small home improvement projects, testing new household tools, and finding simple ways to make living spaces more functional. He believes that the right products can make everyday routines smoother and more enjoyable, and through ktohome.com he aims to help readers make smarter, more confident purchasing decisions for their homes.
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