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Aluminum Propellers for 40-140HP Mercury Engines

by huadong fan 03 Feb 2025

Aluminum propellers play a crucial role in ensuring optimal performance for your 40-140HP Mercury engines. Whether you own a 4-stroke, a 2-stroke, or a specialized model like the Sea Pro or Marathon, finding the right propeller makes all the difference. This comprehensive guide dives deep into the technical specifications of these propellers, covering aspects like blade count, pitch, diameter, OEM compatibility, and more. Let’s explore the fine details of these versatile aluminum propellers.

Engines Application:
40-140HP
4-1/4" Gearcase
40/50hp(4 stroke/bigfoot)/CT...all years
60hp(4 stroke/big foot)/CT...1995-newer
60hp(Sea Pro/Marathon)...1995-newer
65hp(Model 650-4 Cyl)...1961-1970
65hp(Model 650-2 Cyl)...-1971
70hp...1987-198975hp(284 stroke)...1984-newer
75hp(Sea Pro/Marathon)...All years
80hp...1978-198980hp(Mariner)..1978-1983
80hp(Yamaha)...1977-1983
80hp(Model800-284 Cyl)...-1977
80hp(Model850-284 Cyl)...-1977
90hp(2&4 stroke)...1978-newer
100hp...1988-newer
115hp(284 stroke)...1978-newer
125hp...1994-newer
140hp(Including Sea Pro/Offshore)...1978-1981
Models 900-1500...-1977
Force 75hp...99-newer
Force90/120/150hp..1995-newer
15 Spline Tooth
OEM# SOLAS part NO. B D P R
48-77348A45 / 3 12 3/4 21 R
48-77346A45 9411-130-19 3 13 19 R
48-77344A45 9411-133-17 3 13 1/4 17 R
/ 1412-133-17 3 13 1/4 17 L
/ 1411-135-15 3 13 1/2 15 R
/ 1411-138-13 3 13 5/8 13 R
48-77342A45 9411-135-15 3 13 3/4 15 R
/ 1411-140-09 3 14 9 R
48-854342A45 / 3 14 10 R
48-77338A45 9411-140-11 3 14 11 R
48-77340A45 9411-138-13 3 14 13 R
/ / 3 14 15 R
/ / 3 14 17 R
/ / 3 14 19 R
/ / 3 14 21 R
/ / 4 12.5 19 R
/ 9413-130-15 4 13 15 R
48-8M8026590 9413-128-17 4 13 17 R
/ 9413-125-19 4 13 19 R
/ / 4 13.4 15 R
/ / 4 13.8 10 R
/ / 4 13.8 11 R
/ / 4 13.8 13 R

Precision-Engineered Blades for Superior Performance

The propellers outlined here are meticulously designed with three or four blades. A higher blade count typically offers enhanced thrust and smoother operation, making them ideal for varying water conditions. The choice between three and four blades depends on your engine’s power output and specific performance goals. For example, the three-blade designs (like the OEM# 48-77348A45) prioritize speed and efficiency, while four-blade options (such as 48-8M8026590) excel in stability and load handling.

Decoding Pitch and Diameter

Understanding pitch and diameter is essential for selecting the right propeller. Pitch refers to the theoretical distance a propeller moves in one full rotation, while diameter measures the overall size of the blade circle. For Mercury engines ranging from 40 to 140HP, propellers are available in diameters from 12.5 inches to 14 inches and pitches between 9 and 21 inches. These specifications cater to diverse performance needs, from high-speed cruising to heavy-load towing.

Some popular configurations include:

  • 12 3/4" x 21" (OEM# 48-77348A45): Perfect for high-speed enthusiasts.

  • 13" x 19" (OEM# 48-77346A45): A balanced choice for versatile performance.

  • 14" x 9" (OEM# 48-77342A45): Designed for maximum thrust at lower speeds.

Compatibility with Leading Engine Models

These aluminum propellers are engineered to match a variety of Mercury engines, including specialized models like the 4-stroke Bigfoot and CT versions, as well as Force 75hp engines built after 1995. While they are also suitable for Yamaha engines (e.g., 80hp models from 1977-1983), it’s important to note that we are not affiliated with Yamaha. Our propellers are designed as high-quality alternatives, offering excellent compatibility and performance.

Here’s a breakdown of key engine applications:

  • 60HP (Sea Pro/Marathon): Compatible with models manufactured after 1995.

  • 75HP (284 stroke): Designed for engines from 1984 onward.

  • 90HP (2 & 4 stroke): Suitable for post-1978 models.

  • 140HP (Sea Pro/Offshore): A great fit for engines from 1978 to 1981.

OEM Numbers and SOLAS Part Numbers

To ensure precise compatibility, each propeller is cross-referenced with OEM numbers and SOLAS part numbers. This makes it easy for you to find the perfect replacement or upgrade for your engine. For instance:

  • 48-77348A45 corresponds to SOLAS part 9411-130-19.

  • 48-77340A45 aligns with SOLAS part 9411-138-13.

  • 48-8M8026590 matches SOLAS part 9413-128-17.

These part numbers guarantee seamless integration, reducing installation time and ensuring optimal performance from the outset.

Why Choose Aluminum Propellers?

Aluminum propellers are celebrated for their durability, affordability, and lightweight design. Unlike stainless steel, aluminum offers a cost-effective solution without compromising on reliability. These propellers are particularly well-suited for recreational boaters, fishing enthusiasts, and anyone looking for consistent performance at an accessible price point.

Advantages of Aluminum Propellers

  • Lightweight Design: Reduces strain on the engine, enhancing fuel efficiency.

  • Affordability: Offers exceptional value without sacrificing quality.

  • Corrosion Resistance: With proper care, aluminum propellers withstand exposure to freshwater and saltwater environments.

Making the Right Choice

Selecting the right propeller involves balancing your engine’s specifications, boating habits, and performance needs. Factors such as load capacity, cruising speed, and water conditions play a significant role in determining the best fit. Consulting the OEM and SOLAS part numbers ensures that your choice aligns perfectly with your engine model.

Final Thoughts

Investing in the right aluminum propeller transforms your boating experience, offering improved performance, fuel efficiency, and reliability. Whether you're upgrading your existing setup or replacing a worn-out propeller, the options outlined above provide a trusted solution for Mercury engines ranging from 40 to 140HP. With precise engineering and robust construction, these propellers deliver dependable performance for years to come.

 

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