A water pump impeller replacement is a crucial maintenance task for boat and marine engines. This impeller is responsible for circulating coolant, preventing overheating, and ensuring optimal engine performance. Regular replacement of the impeller helps maintain the reliability and longevity of marine power systems, such as Perkins and Ancor engines.
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1-2 weeks delivery time With 12 blades, the Allpa impeller includes both a gasket and cap, ensuring reliable operation in demanding marine systems.
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$ 38.62
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1-2 weeks delivery time The Allpa impeller features 12 blades, a longer depth, and includes a gasket, designed for marine pumps requiring greater internal volume.
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$ 68.89
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1-2 weeks delivery time This 12-blade Allpa impeller is the largest in the group, includes a cap, and is built for systems with high flow requirements.
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$ 304.51
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1-2 weeks delivery time The 6-blade Allpa impeller offers moderate dimensions, is commonly used in compact pump assemblies, and does not include additional accessories.
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$ 23.33
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1-2 weeks delivery time Constructed with 6 blades, this Allpa impeller has a wide diameter and shallow depth, suitable for applications with low axial space.
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$ 16.78
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1-2 weeks delivery time Designed for optimal performance in water pump systems, this Allpa impeller features 6 blades and precise dimensions.
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$ 17.16
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1-2 weeks delivery time Reliable and efficient, this 6-blade Allpa impeller has compact dimensions suitable for tight installation spaces.
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$ 21.17
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1-2 weeks delivery time Equipped with 12 blades and a gasket, this Allpa impeller provides high flow capacity along with essential sealing components.
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$ 45.45
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1-2 weeks delivery time Ideal for compact systems, this 6-blade Allpa impeller includes a gasket for easy replacement and reliable sealing.
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$ 26.07
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1-2 weeks delivery time The Allpa 500383 impeller features 8 blades designed for balanced performance and durability, suitable for longer operating cycles with specific dimensions of Ø A 13.97 mm, Ø B 40.8 mm, and length 23.4 mm.
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$ 22.16
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1-2 weeks delivery time The Allpa 500349 impeller has a 6-blade design with a 69 mm diameter, built for consistent flow and durability, measuring Ø A 14 mm, Ø B 69 mm, and length 12.72 mm.
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$ 17.93
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1-2 weeks delivery time The Allpa 500165 impeller offers a durable 12-blade construction for marine applications, ensuring reliable and precise flow control, with dimensions Ø A 15.95 mm, Ø B 62.2 mm, and length 22.4 mm, including a gasket.
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$ 45.45
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1-2 weeks delivery time The Allpa 500374 impeller is compact with 6 blades, optimized for efficient water movement in small marine systems, sized at Ø A 15.94 mm, Ø B 51.2 mm, and length 19.05 mm.
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$ 17.53
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1-2 weeks delivery time The Allpa 500170 impeller features 12 blades for high-capacity performance in demanding marine environments and comes with a key and gasket; it measures Ø A 16 mm, Ø B 57 mm, and length 31.6 mm.
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$ 42.36
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1-2 weeks delivery time The Allpa 500366 impeller is a reliable 6-blade unit designed for marine cooling systems with tight space requirements, sized Ø A 16 mm, Ø B 69 mm, and length 12.72 mm.
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$ 26.98
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1-2 weeks delivery time The Allpa 500379 impeller offers efficient performance with 6 blades and a slightly larger Ø A dimension, measuring Ø A 17.2 mm, Ø B 50.4 mm, and length 20.2 mm.
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$ 22.08
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1-2 weeks delivery time The Allpa 500122 impeller has 8 blades with an extended length for high-flow marine pumps, designed for steady efficiency with dimensions Ø A 17 mm, Ø B 65 mm, and length 48.6 mm.
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$ 39.35
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1-2 weeks delivery time The Allpa 500382 impeller is compact with 6 blades, suitable for various marine applications requiring efficient flow in a smaller profile, measuring Ø A 17.2 mm, Ø B 44.25 mm, and length 20.25 mm.
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$ 20.66
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1-2 weeks delivery time The Allpa 500128 impeller features 8 blades and a larger diameter for robust water movement and higher pressure capability, sized Ø A 17 mm, Ø B 66 mm, and length 32 mm.
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$ 30.43
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1-2 weeks delivery time The Allpa 500353 impeller is a reliable 6-blade design with medium dimensions, suitable for general marine cooling or pumping systems, measuring Ø A 17.5 mm, Ø B 51.2 mm, and length 19.05 mm.
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$ 22.45
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How does a flexible impeller differ from a standard water pump impeller in terms of functionality?
A flexible impeller differs from a standard water pump impeller in its design and ability to handle varying conditions. Made of neoprene or nitrile rubber, the flexible impeller blades bend and conform to changes inside the pump body, making it effective for raw water pumping in marine engines. This flexibility allows it to handle small debris and tolerate running dry briefly, reducing the risk of damage compared to a standard impeller, which is typically made of more rigid materials and has less tolerance for friction or sudden changes in conditions.
When replacing a flexible impeller, having the right spare parts is crucial to ensure proper installation and function. An impeller puller is often needed to remove the old impeller from the pump shaft without causing damage. During installation, it's important to lubricate the impeller and insert it in the correct direction to avoid damaging the blades. A proper gasket and cover must also be used to prevent leaks, and all components—such as the impeller hub—should be securely in place to maintain efficient engine cooling.
How does an impeller replacement affect the performance of a boat outboard engine?
Replacing an impeller in a boat outboard engine ensures the engine cooling system functions effectively, preventing overheating and maintaining optimal performance. Installing a new impeller helps maintain efficient water transfer within the pump body, ensuring the engine remains cool during operation. Regular replacement is crucial for reliability, especially for demanding conditions in both inboard and outboard applications.
For reliable replacements tailored to your engine, explore our full selection of Evinrude Impeller options.
What are the differences between neoprene and nitrile impellers for marine applications?
Neoprene and nitrile impellers differ in their suitability for marine applications. Neoprene impellers are ideal for most marine cooling systems due to their flexibility and durability when pumping fresh or saltwater, making them suitable for emergency situations. Nitrile impellers, on the other hand, are more resistant to oils and chemicals, making them a good idea for applications where the impeller may come into contact with fuel or oil. Both types are durable, but choosing the right one depends on the specific needs of the engine's cooling or raw water system.