Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L Review

The Real-Use Review: Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L

There are moments in any outdoor enthusiast’s life when a piece of equipment simply needs to perform, and failure isn’t an option. For boaters, especially those pushing their rigs, propeller performance is paramount. The Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L represents a significant upgrade for many smaller to mid-size outboard-powered vessels. This four-blade stainless steel prop is engineered to enhance hole shot, improve mid-range cruising, and offer better overall efficiency for engines in the 40 to 150 horsepower range.

My journey to this specific propeller began with a frustrating season battling a worn-out, standard aluminum prop on my trusty 115hp outboard. It struggled to get my moderately loaded bass boat onto plane quickly, and fuel economy was noticeably poorer than it used to be. I started researching replacement options, looking for something that could offer a tangible improvement without breaking the bank, and the Turning Point Express series consistently popped up. My initial impression upon unboxing was one of solid craftsmanship; the stainless steel felt substantial, and the blade design looked aggressive yet refined.

I briefly considered a basic OEM replacement from a different manufacturer, but the allure of a performance-oriented, four-blade stainless steel prop was too strong to ignore. The immediate feeling was one of anticipation – a promise of improved performance and a more enjoyable time on the water.

Real-World Testing: Putting Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L to the Test

First Use Experience

My initial test of this prop was on a calm, early spring morning on a local lake. I mounted the Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L myself, which was a straightforward process. The real test began when I pushed the throttle forward.

The difference was immediately apparent; the boat popped onto plane significantly faster and with less bow rise than with my old prop. I noticed a definite improvement in mid-range acceleration and holding a steady cruising speed felt more effortless. The prop handled chop and wakes surprisingly well, maintaining grip without excessive cavitation.

There was a slight learning curve in adjusting my trim based on the new prop’s performance characteristics, but it was intuitive rather than cumbersome. The only initial surprise was how much smoother the ride felt overall, almost as if the boat was more stable at speed.

Extended Use & Reliability

Over the following months, this Turning Point propeller became a permanent fixture on my outboard. I subjected it to a variety of conditions: full loads with fishing buddies and gear, solo runs for quick scouting missions, and even some light towing of a tube for the kids. It consistently performed, handling the diverse demands without complaint.

Durability has been excellent. Despite occasionally running in shallow water and inadvertently nudging submerged objects (nothing severe, thankfully), I’ve seen no significant nicks, bends, or cracks on the stainless steel blades. The finish remains largely unblemished, showing only minor scuffs that are typical for any propeller that sees regular use.

Maintenance is as simple as it gets; a quick rinse with fresh water after saltwater excursions and an occasional check for any debris. Compared to my previous aluminum prop, which showed signs of erosion and pitting after just a couple of seasons, this stainless steel unit feels built to last. It definitely outperforms budget aluminum options in terms of longevity and sustained performance.

Breaking Down the Features of Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L

Specifications

• Series: Express Series
• Blade Count: 4 Blades – This is a key differentiator, providing increased thrust and better grip compared to standard 3-blade designs.
• Material: Stainless Steel – Offers superior strength, durability, and corrosion resistance over aluminum.
• Engine Compatibility: Designed for 40-150hp Engines with a 4.25in Gearcase. This specific fitment is crucial for optimal performance and avoiding compatibility issues.
• Rotation: Left Hand (LH) – Essential for counter-rotating twin engine setups or specific inboard/outboard applications requiring left-hand rotation.
• Diameter: 13.25 inches – A standard diameter that balances performance and efficiency for the targeted horsepower range.
• Pitch: 17 inches – The pitch determines how far the propeller moves the boat forward in one revolution; 17 inches is a common mid-range pitch for this engine class.
• Model/Part Number: EX1/EX2-1317-4L (31431740 is the SKU) – This designation clearly identifies the propeller’s specifications.

These specifications work in concert to deliver enhanced performance. The four stainless steel blades offer more surface area for better bite in the water, crucial for improved hole shot and load carrying. The specific pitch and diameter are chosen to optimize the engine’s power band for a balance of acceleration and top-end speed within the 40-150hp range. The left-hand rotation is a critical detail for twin-engine boats or specific applications where counter-rotation is required.

Performance & Functionality

In terms of its primary job, the Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L excels. The most significant improvement is its ability to get the boat on plane much quicker, even with a heavy load. This makes docking, maneuvering at low speeds, and pulling wakeboards or tubes considerably easier.

The mid-range performance is also a strong suit; the boat feels more responsive and holds its speed with less engine strain. Top-end speed saw a modest increase, but the real win is the improved efficiency across the board. The propeller’s four-blade design significantly reduces ventilation and porpoising, offering a much more stable and predictable ride.

Its main strength is undoubtedly the enhanced hole shot and improved grip in rougher water. The only minor weakness I’ve observed is that, like most aggressive four-blade props, it might lead to a slight decrease in absolute top-end speed compared to a perfectly matched high-performance three-blade prop; however, the trade-off in overall usability and efficiency is well worth it for most boaters. This propeller meets and often exceeds expectations, especially considering its price point relative to other premium stainless steel options.

Design & Ergonomics

The build quality of this Turning Point propeller is impressive. The stainless steel construction feels robust, and the polished finish gives it a premium look. The blades are sculpted with a good degree of rake and cup, which are critical for performance.

Ergonomically, a propeller isn’t something you hold, but its design directly impacts the boat’s handling and the helmsman’s experience. The improved grip and reduced vibration translate into a more comfortable ride for everyone on board. The precision balancing is evident in the smooth operation at all RPMs, with no noticeable imbalance or excessive vibration.

The overall design is functional and focused on performance. The hub area appears well-reinforced, and the trailing edges of the blades are smooth, minimizing drag. There are no user-adjustable parts, which simplifies things but also means there’s no “tuning” beyond propeller selection.

Durability & Maintenance

This propeller is built for the long haul. The stainless steel material is inherently more resistant to the corrosive effects of saltwater and the physical impacts of submerged debris than aluminum. I expect this propeller to last many seasons with proper care.

Maintenance is minimal. Rinsing it thoroughly after each use in saltwater is the most important step to prevent corrosion and keep the finish looking good. I haven’t had to perform any specific maintenance beyond occasional visual inspections for damage.

Potential concerns are minimal, primarily related to physical impact damage if one were to strike a solid object at high speed. However, the robust nature of stainless steel offers significant protection against typical wear and tear encountered on the water. It’s a workhorse designed for reliability.

Accessories and Customization Options

The Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L is typically sold as a standalone product. It often comes with the necessary hardware or utilizes a proprietary hub system that requires specific installation kits, which should be confirmed at the point of purchase.

Turning Point does offer a range of interchangeable hub kits, allowing this propeller to be fitted to various engine brands and models within its horsepower range. This is a significant advantage, as it provides flexibility if you ever switch outboards. There are no other real customization options for the propeller itself, as its design is fixed for performance.

Pros and Cons of Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L

Who Should Buy Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L?

This propeller is an excellent choice for owners of boats powered by outboards in the 40-150hp range with a 4.25-inch gearcase. It’s ideal for anyone looking to improve their boat’s performance, particularly those who frequently carry heavy loads, pull skiers or tubers, or want a quicker transition onto plane. Bass anglers, families who enjoy watersports, and boaters who value responsive handling will find this propeller a significant upgrade.

Anyone seeking the absolute maximum top-end speed at the expense of hole shot and mid-range might consider a specialized 3-blade racing prop instead. However, for the vast majority of recreational boaters, this Turning Point prop offers a superior all-around performance package. A compatible hub kit is an essential accessory to ensure proper installation and performance.

Conclusion on Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L

The Turning Point Propellers 31431740 Express 4 Blade SS Propellers For 40 150Hp Engines With 4.25in Gc 13.25in x 17in LH Ex1/Ex2 1317 4L has proven to be a fantastic upgrade for my outboard. It strikes an excellent balance between performance enhancement, durability, and value. The improvements in hole shot, stability, and overall efficiency are undeniable and make a tangible difference in daily use.

Considering its robust stainless steel construction, impressive performance gains, and competitive pricing, this propeller offers exceptional value. I would wholeheartedly recommend it to any boater in the specified horsepower range looking to get more out of their engine and enjoy a better experience on the water. If you’re tired of sluggish acceleration and want a more responsive, stable ride, this propeller is a smart investment.