A boat propeller is a crucial component in the propulsion system of a boat, responsible for converting the engine's rotational power into forward or backward thrust. They come in various sizes and styles, each designed to match specific boat types and performance needs. The design of the propeller affects the boat's speed, handling, and fuel efficiency, making its selection important for optimal boat performance. In our online shop, we stock a variety of options to match your boat's specifications. Ensure you choose the right hub and bearing for a smooth fit and operation, whether you need a right-hand (RH) prop or another configuration. Our knowledgeable customer support team is ready to assist you in finding the perfect propeller to enhance your boat's performance and reliability.
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1-2 weeks delivery time Flexofold Bladeset FP-2B 16x11 LH is a 2-blade left-hand rotating bladeset with a 16 inch diameter and 11 inch pitch, made from Nickel Aluminum Bronze for reliable propulsion, smooth operation, and long service life, compatible with Flexofold system 735007.
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$ 1,358.98
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1-2 weeks delivery time Flexofold Bladeset FP-2B 16x12 LH is a left-hand rotating 2-blade bladeset with a 16 inch diameter and 12 inch pitch, built from durable Nickel Aluminum Bronze to deliver balanced thrust and dependable marine performance with Flexofold system 735007.
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$ 1,358.98
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1-2 weeks delivery time Flexofold Bladeset FP-2B 16x13 LH is a heavy-duty left-hand rotating 2-blade bladeset designed for 35 mm shafts, featuring a 16 inch diameter, high blade area, precise shaft fit, and Nickel Aluminum Bronze construction for strong and reliable propulsion.
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$ 1,358.98
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1-2 weeks delivery time Flexofold Bladeset FP-2B 16x14 LH is a high-efficiency 2-blade left-hand bladeset with a 16 inch diameter, reinforced hub design, and Nickel Aluminum Bronze construction, delivering strong thrust and stable performance under demanding marine conditions.
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$ 1,358.98
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1-2 weeks delivery time Flexofold Bladeset FP-2B 17x11 LH is a left-hand rotating 2-blade bladeset with a 17 inch diameter and high blade area, manufactured from Nickel Aluminum Bronze to provide powerful thrust, smooth maneuvering, and reliable operation on larger sailboats.
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$ 1,540.95
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1-2 weeks delivery time Flexofold Bladeset FP-2B 17x12 LH is a balanced left-hand rotating bladeset with a 17 inch diameter and 12 inch pitch, made from Nickel Aluminum Bronze to ensure consistent power delivery and long-term durability in marine environments.
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$ 1,540.95
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1-2 weeks delivery time Flexofold Bladeset FP-2B 17x13 LH is a 2-blade left-hand rotating bladeset with a 17 inch diameter and 13 inch pitch, offering efficient propulsion and dependable performance through its robust Nickel Aluminum Bronze construction.
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$ 1,540.95
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1-2 weeks delivery time Flexofold Bladeset FP-2B 17x14 LH is a high-thrust left-hand rotating bladeset with a 17 inch diameter, large blade area, and Nickel Aluminum Bronze build, designed to deliver smooth and powerful propulsion under load.
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$ 1,540.95
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1-2 weeks delivery time Flexofold Bladeset FP-2B 17x15 LH is a heavy-duty 2-blade left-hand bladeset with a 17 inch diameter, reinforced hub dimensions, and high blade area, providing strong power transfer and reliable marine performance.
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$ 1,540.95
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1-2 weeks delivery time Flexofold Bladeset FP-2B 18x12 LH is a large 2-blade left-hand rotating bladeset with an 18 inch diameter and very high blade area, built from Nickel Aluminum Bronze to deliver exceptional thrust and control under heavy load.
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$ 1,902.57
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1-2 weeks delivery time Flexofold Bladeset FP-2B 18x13 LH is a left-hand rotating 2-blade bladeset with an 18 inch diameter and high blade area, designed for powerful propulsion, smooth handling, and excellent durability in demanding marine use.
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$ 1,902.57
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1-2 weeks delivery time Flexofold Bladeset FP-2B 18x14 LH is a high-performance left-hand rotating bladeset with an 18 inch diameter, optimized blade area, and Nickel Aluminum Bronze construction, ensuring smooth power delivery and dependable thrust.
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$ 1,902.57
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1-2 weeks delivery time Flexofold Bladeset FP-2B 18x15 LH is a robust 2-blade left-hand bladeset with an 18 inch diameter and high blade area, offering reliable propulsion, strong acceleration, and long service life in marine environments.
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$ 1,902.57
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1-2 weeks delivery time Flexofold Bladeset FP-2B 18x16 LH is a 2-blade left-hand rotating bladeset with an 18 inch diameter, 92% blade area, and Nickel Aluminum Bronze construction, designed to deliver smooth, powerful thrust and long-lasting performance on larger propulsion systems.
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$ 1,902.57
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1-2 weeks delivery time Flexofold Bladeset FP-2B 20x14 LH is a large 2-blade left-hand rotating bladeset with a 20 inch diameter, made from Nickel Aluminum Bronze to provide reliable propulsion and durability for heavy-duty marine applications.
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$ 2,450.96
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1-2 weeks delivery time Flexofold Bladeset FP-2B 20x15 LH is a high-thrust left-hand rotating bladeset with a 20 inch diameter, very high blade area, and Nickel Aluminum Bronze build, delivering strong power transfer and smooth operation under demanding conditions.
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$ 2,450.96
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1-2 weeks delivery time Flexofold Bladeset FP-2B 20x16 LH is a heavy-duty 2-blade left-hand bladeset designed for 40 mm shafts, featuring an extended hub length, high blade area, and Nickel Aluminum Bronze construction for stable and reliable propulsion.
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$ 2,450.96
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1-2 weeks delivery time Flexofold Bladeset FP-2B 20x17 LH is a left-hand rotating 2-blade bladeset with a 20 inch diameter and high blade area, offering efficient cruising performance and strong thrust in demanding marine propulsion systems.
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$ 2,450.96
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1-2 weeks delivery time Flexofold Bladeset FP-2B 12x7 RH is a compact 2-blade right-hand rotating bladeset with a 12 inch diameter, built from Nickel Aluminum Bronze to provide smooth operation and dependable performance for smaller propulsion systems.
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$ 954.84
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1-2 weeks delivery time Flexofold Bladeset FP-2B 12x8 RH is a right-hand rotating 2-blade bladeset with a 12 inch diameter, high blade area, and precise shaft fit, designed to deliver controlled thrust and smooth propulsion in compact installations.
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$ 954.84
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What are the differences between inboard and outboard boat propellers?
Inboard and outboard boat propellers differ primarily in their placement and integration with the boat's engine. Inboard propellers are part of a system where the engine is mounted inside the boat, driving the propeller through a shaft that extends to the hull's exterior. This setup is commonly used in larger boats and offers better protection for the propeller. Outboard propellers, on the other hand, are attached to an outboard motor, which is mounted externally on the stern of the boat. This arrangement provides easier access for maintenance and replacement, and is typical for smaller boats and sailing vessels. Additionally, inboard propellers often require a more complex and protected installation, while outboard setups allow for greater flexibility and ease of handling.
When searching for boat props, it's important to find the right propeller for your boat to ensure optimal performance. We offer a wide range of boat propellers for sale, including performance propellers, sterndrive, and general propeller-GP models. Our inventory includes PowerTech propellers and custom inboard propellers, perfect for ski and wake boats. Our expert team can help you with any custom inboard propeller needs and provide replacement boat propellers. We strive to offer one of the largest selections of boat props at the lowest prices. Whether you're dealing with a bent prop shaft or need a duo blade powertech prop, we aim to provide consistent quality and fuel economy.
How do the materials used in inboard boat props and shaft affect their performance and durability?
The materials used in boat propellers significantly influence their performance and durability. Bronze propellers, commonly used in many inboard applications, offer excellent corrosion resistance and durability, making them suitable for long-term use in saltwater environments. Stainless steel propellers, on the other hand, provide a stronger alternative with greater impact resistance and less flex under load, enhancing performance by maintaining more precise blade shape at higher speeds.
Both materials ensure that the propellers can withstand the harsh marine environment while supporting the specific performance requirements of different types of boats, from sailing vessels to motor-driven crafts.
What is the impact of inboard propellers blade count on a boat’s maneuverability and thrust?
The number of blades on a boat propeller plays a crucial role in determining the boat's maneuverability and thrust. Generally, a propeller with more blades, such as a four or five-blade propeller, provides smoother operation and better traction in the water, which enhances maneuverability at lower speeds and in tight conditions. Fewer blades, like those on a three-blade propeller, typically generate greater top speed and are more efficient, making them ideal for faster inboard and outboard boats. The choice of blade count should align with the boat's intended use and performance goals, whether it's for leisurely sailing or high-speed boating, ensuring optimal propulsion and handling characteristics.
Find the ideal setup for your boating style in our complete range of Outboard Propellers.
What are the basics of inboard boat propellers and how do they differ from other types?
| Aspect | Inboard Propeller System | Other Propulsion Types (Outboard, Sterndrive) |
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| Engine Location | Mounted centrally inside the hull, forward of the transom. | Engine or drive unit is attached to or through the transom. |
| Propeller Drive | Fixed propeller shaft connected directly to the transmission. | Propeller is on a vertical driveshaft or integrated lower unit. |
| Steering Mechanism | Rudder directs water flow from the propeller for directional change. | The entire motor or drive unit swivels to change thrust vector. |
| Efficiency & Vibration | Long, straight shaft alignment promotes smooth, efficient power transfer. | Universal joints or gears in lower units can absorb more energy. |
| Typical Hull Suitability | Common on larger sailboats, trawlers, cruisers, and workboats. | Dominant on smaller recreational powerboats and runabouts. |
How does choosing between a 3-blade and 4-blade propeller affect performance and fuel efficiency?
A 3 blade propeller often provides a slight edge in top speed and maximum efficiency for lightweight, faster hulls. In contrast, a 4 blade propeller typically offers superior low-speed thrust, smoother operation, and better cruise efficiency for heavier vessels, trading a bit of peak speed for improved grip and handling.
What do diameter and pitch mean when selecting the right inboard propeller?
Diameter is the circle described by the blade tips, governing thrust and load capacity. Pitch is the theoretical forward travel per revolution, dictating speed and engine load.
Together, they define the right prop for your engine and hull:
- A larger diameter increases low-end thrust.
- More pitch allows higher potential speed.
- Incorrect combinations cause over or under-revving.
How does the bore size influence the fit and balance of an inboard boat propeller?
The bore is the central hole that mates the propeller to the tapered shaft. An imprecise fit causes wobbling, vibration, and potential damage to the shaft or strut. A perfectly matched bore, often achieved through CNC machining by brands like Acme Marine, ensures concentric balance and secure keyway engagement for marine propulsion integrity.
Where can you find high-quality inboard propellers for sale from brands like Acme?
Specialist prop shops and major marine distributors maintain an extensive inventory of inboard units from leading manufacturers. Propellers are available directly from select boat builders or through authorized online retailers that cater to yacht and commercial operators. Brands like Michigan Wheel, OJ, and VEEM offer robust options in NiBral material known for its strength and corrosion resistance.