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 The Max Prop Whisper 111 with a 21" diameter delivers stable performance and efficient power transfer, with a robust bronze alloy and precise 5 blade design for smooth and dependable sailing.
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$ 12,216.04
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1-2 weeks delivery time The Max Prop Whisper 111 with a 22" diameter is engineered for higher thrust requirements, featuring a 5 blade layout that minimizes cavitation and enhances efficiency while maintaining smooth handling.
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$ 12,503.64
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1-2 weeks delivery time The Max Prop Whisper 111 with a 23" diameter is designed for larger shaft applications, offering smooth power delivery and long-term reliability with its strong 5 blade bronze construction.
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$ 12,503.64
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1-2 weeks delivery time The Max Prop Whisper 111 with a 25" diameter provides maximum thrust and stable operation, featuring a durable 5 blade bronze design for consistent performance in demanding marine environments.
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$ 12,998.57
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1-2 weeks delivery time The Max-Prop Boomerang 101 is a three-blade folding propeller designed for modern sailing yachts with hydraulic transmissions, featuring a patented radial spring system that automatically moves the blades into the shaft-aligned vane position when engine torque disappears, minimizing drag and enhancing efficiency.
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$ 9,027.08
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1-2 weeks delivery time The Max-Prop Boomerang 101 with 19" pitch is engineered for maximum performance and control, using a radial spring package that automatically returns the blades to the vane position when no torque is applied, reducing resistance and improving sailing performance.
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$ 9,027.08
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1-2 weeks delivery time The Max-Prop Boomerang 101 with 20" pitch delivers strong thrust and precise maneuverability for larger sailboats, with a spring-loaded mechanism that moves the blades into the vane position when the engine stops, independent of boat speed or shaft rotation.
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$ 9,027.08
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1-2 weeks delivery time The Max-Prop Boomerang 101 with 21" pitch is a high-performance three-blade propeller that automatically aligns into the shaft vane position when engine torque stops, reducing drag and providing efficient power transmission for sailing yachts with hydraulic transmissions.
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$ 9,123.01
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1-2 weeks delivery time The Max-Prop Boomerang 101 with 22" pitch offers excellent thrust, control, and efficiency, featuring a patented radial spring package that ensures the blades automatically return to the shaft-aligned vane position as soon as torque is removed.
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$ 9,123.01
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1-2 weeks delivery time The Max-Prop Boomerang 101 with 23" pitch is designed for yachts requiring strong propulsion and precise maneuvering, with a spring-loaded blade system that automatically moves the blades into the vane position when the engine stops, reducing drag and improving performance.
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$ 9,367.57
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1-2 weeks delivery time The Max-Prop Boomerang 111 with 20" pitch is a high-quality three-blade propeller for sailing yachts with hydraulic transmissions, automatically aligning into the shaft vane position when engine torque is removed to reduce drag and enhance sailing performance.
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$ 13,025.57
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1-2 weeks delivery time The Max-Prop Boomerang 111 with 21" pitch delivers excellent thrust, efficiency, and control, using a patented radial spring system to move the blades into the vane position as soon as torque is removed, ensuring minimal drag and smooth operation.
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$ 13,025.57
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1-2 weeks delivery time The Max-Prop Boomerang 111 with 22" pitch is engineered for strong propulsion and precise maneuvering, with a spring-loaded mechanism that automatically aligns the blades into the shaft position when the engine is switched off, improving efficiency under sail.
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$ 13,275.55
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1-2 weeks delivery time The Max-Prop Boomerang 111 with 23" pitch is a premium three-blade propeller for modern sailing yachts, automatically moving into the shaft-aligned vane position when engine torque stops, reducing drag and enhancing sailing efficiency.
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$ 13,275.55
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1-2 weeks delivery time The Max-Prop Boomerang 111 with 24" pitch provides strong thrust and precise maneuvering, with a patented radial spring package that automatically returns the blades to the shaft position as soon as engine torque is removed, ensuring smooth operation.
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$ 13,487.72
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1-2 weeks delivery time The Max-Prop Boomerang 111 with 25" pitch delivers maximum propulsion and excellent control for larger sailing yachts, using a spring-loaded blade mechanism that moves the blades into the vane position when the engine is switched off, regardless of boat speed or shaft rotation.
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$ 13,732.28
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1-2 weeks delivery time The Max-Prop Boomerang 120 is a three-blade folding propeller for modern sailboats with hydraulic transmissions, automatically moving into the shaft-aligned vane position when engine torque stops, reducing drag and enhancing sailing performance.
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$ 15,082.19
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1-2 weeks delivery time The Max-Prop Boomerang 120 with 23" pitch delivers excellent thrust, control, and efficiency, featuring a patented radial spring package that automatically aligns the blades into the vane position as soon as torque is removed from the propeller shaft.
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$ 15,082.19
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1-2 weeks delivery time The Max-Prop Boomerang 120 with 24" pitch is engineered for yachts needing strong propulsion and precise maneuverability, with a spring-loaded blade system that ensures automatic vane positioning when the engine is switched off, independent of boat speed.
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$ 15,296.22
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1-2 weeks delivery time The Max-Prop Boomerang 120 with 25" pitch is a high-performance three-blade propeller for modern sailboats with hydraulic transmissions, automatically moving into the shaft-aligned vane position when engine torque is removed, reducing drag and improving sailing efficiency.
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$ 15,296.22
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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) |
|---|---|---|
| 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.