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 Easy 90 21" saildrive antishock propeller combines maximum thrust with drivetrain protection. Its integrated antishock system minimizes shock loads, and the four-blade folding design ensures efficient, comfortable operation with durable Nikkel Aluminium Bronze.
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$ 6,045.25
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1-2 weeks delivery time The Max Prop Easy 101 with an 18" diameter is a high-performance folding propeller offering smooth propulsion, excellent thrust, and reduced drag under sail, made from durable Nikkel Aluminium Bronze for long-term reliability.
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$ 6,733.70
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1-2 weeks delivery time The Max Prop Easy 101 with a 19" diameter provides increased thrust and dependable handling for larger yachts, with a four-blade folding design that ensures smooth propulsion and minimized resistance while sailing.
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$ 4,990.95
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1-2 weeks delivery time The Max Prop Easy 101 with a 20" diameter delivers powerful propulsion and precise maneuverability for yachts, featuring a four-blade folding design that reduces drag and ensures smooth thrust.
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$ 6,733.70
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1-2 weeks delivery time The Max Prop Easy 101 with a 21" diameter is designed for larger yachts requiring maximum thrust and stable performance, offering smooth and efficient power with minimal drag through its four-blade folding propeller.
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$ 6,836.53
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1-2 weeks delivery time The Max Prop Easy 101 with a 22" diameter ensures strong and reliable propulsion for larger yachts, providing smooth thrust, efficient performance, and reduced drag under sail with its four-blade folding configuration.
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$ 6,836.53
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1-2 weeks delivery time The Max Prop Easy 101 with a 23" diameter offers maximum thrust for demanding sailing, delivering smooth power, reliable maneuverability, and low drag under sail through its four-blade folding design.
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$ 6,878.25
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1-2 weeks delivery time The Max Prop Easy 111 with a 20" diameter is a robust folding propeller designed for efficient propulsion and dependable sailing, providing smooth thrust, excellent control, and reduced drag under sail.
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$ 7,871.64
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1-2 weeks delivery time The Max Prop Easy 111 with a 21" diameter is engineered for yachts needing higher torque and precise handling, offering smooth propulsion, excellent maneuverability, and reduced sailing resistance with its four-blade folding design.
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$ 7,871.64
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1-2 weeks delivery time The Max Prop Easy 111 with a 22" diameter provides powerful and consistent propulsion for yachts, ensuring smooth thrust, excellent control, and reduced drag under sail, with durable Nikkel Aluminium Bronze construction.
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$ 7,965.70
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1-2 weeks delivery time The Max Prop Easy 111 with a 23" diameter delivers increased thrust and stable handling for larger yachts, featuring a four-blade folding design for smooth propulsion and low resistance while sailing.
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$ 7,965.70
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1-2 weeks delivery time The Max Prop Easy 111 with a 24" diameter is built for demanding applications requiring maximum thrust and reliable performance, offering smooth power delivery and reduced drag through its four-blade folding propeller.
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$ 8,108.58
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1-2 weeks delivery time The Max Prop Easy 111 with a 25" diameter provides maximum thrust for large yachts and heavy displacement vessels, ensuring powerful propulsion with minimal drag using its four-blade folding configuration.
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$ 8,108.58
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1-2 weeks delivery time The Max Prop Whisper 101 with an 18" diameter is a 5 blade propeller designed for smooth, quiet sailing and high efficiency, made from durable Nikkel Aluminium Bronze for long-lasting corrosion resistance and reliable performance in the Easy series.
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$ 7,749.63
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1-2 weeks delivery time The Max Prop Whisper 101 with a 19" diameter offers efficient thrust and reduced vibration, featuring a 5 blade design and robust bronze construction for improved control and dependable performance in Easy series applications.
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$ 7,749.63
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1-2 weeks delivery time The 20" Max Prop Whisper 101 propeller delivers balanced propulsion with precision-crafted blades that minimize drag while maintaining excellent thrust, constructed from durable marine-grade bronze for consistent and efficient operation.
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$ 7,749.63
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1-2 weeks delivery time The Max Prop Whisper 101 with a 21" diameter is built for vessels needing a larger propeller, providing smooth power transfer, reduced cavitation, and strong, corrosion-resistant 5 blade bronze construction for stable handling.
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$ 7,862.89
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1-2 weeks delivery time The Max Prop Whisper 101 with a 22" diameter is designed for high-efficiency propulsion, offering stable and quiet operation, long-term durability, and reliable performance in demanding marine conditions with its 5 blade bronze construction.
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$ 7,862.89
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1-2 weeks delivery time The 23" Max Prop Whisper 101 propeller supports smooth sailing and dependable propulsion, featuring a 5 blade configuration optimized for balanced thrust within the Easy series.
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$ 8,112.11
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1-2 weeks delivery time The Max Prop Whisper 111 with a 20" diameter provides efficient and quiet propulsion with a 5 blade configuration that improves thrust, reduces vibration, and ensures durability and corrosion resistance in Easy series applications.
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$ 12,216.04
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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.