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 Featuring six blades, the Allpa 500315 impeller is designed for outboard motors with precise dimensions for enhanced performance, measuring Ø A 16 mm, Ø B 73 mm, and length 12.6 mm.
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$ 19.62
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1-2 weeks delivery time The Allpa 500357 impeller is equipped with six blades and includes a gasket, designed specifically for outboard applications, with dimensions Ø A 15.95 mm, Ø B 51.2 mm, and length 19.05 mm.
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$ 24.08
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1-2 weeks delivery time Designed for outboard motors, the Allpa 500345 impeller features six blades and exact dimensions for reliable water flow management, measuring Ø A 16.04 mm, Ø B 69.2 mm, and length 22.25 mm.
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$ 19.86
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1-2 weeks delivery time This Allpa 500378 outboard impeller has 6 blades and precise dimensions designed for superior water movement efficiency.
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$ 27.08
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1-2 weeks delivery time The Allpa 500313 impeller, suitable for outboard motors, includes a gasket and features 6 blades crafted for optimal performance.
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$ 25.99
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1-2 weeks delivery time Designed for outboard motors, the Allpa 500342 impeller has 6 balanced blades and exact dimensions to ensure optimal performance.
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$ 27.83
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1-2 weeks delivery time The Allpa 500335 outboard impeller features 10 blades, providing enhanced water flow and efficiency.
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$ 33.64
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1-2 weeks delivery time Engineered for reliable outboard use, the Allpa 500333 impeller has 6 blades and balanced dimensions for consistent performance.
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$ 20.66
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1-2 weeks delivery time This compact Allpa 500334 outboard impeller offers 6 blades and a slightly smaller diameter for precise water flow control.
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$ 20.66
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1-2 weeks delivery time The Allpa 500346 impeller, designed for larger outboard motors, includes a key and six blades for efficient water flow.
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$ 26.98
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1-2 weeks delivery time With three blades and larger diameters, the Allpa 500372 impeller includes a key and is tailored for powerful water movement in outboard motors.
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$ 28.24
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1-2 weeks delivery time Identical to the 500372, the Allpa 500373 outboard impeller has three blades, large diameters, and includes a key for optimal flow.
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$ 35.19
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1-2 weeks delivery time The Allpa 500303 impeller for outboard motors features six blades, precise dimensions, and includes a key for reliable performance.
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$ 41.56
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1-2 weeks delivery time This Allpa 500308 outboard impeller comes with six blades and includes both a key and a plus accessory for dependable motor function.
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$ 47.02
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1-2 weeks delivery time Featuring six blades and compact dimensions, the Allpa 500370 outboard impeller includes a key and is designed for efficient water flow.
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$ 22.45
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1-2 weeks delivery time The Allpa 500396 impeller has six blades and a compact design for smooth operation, without any included accessories.
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$ 16.49
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1-2 weeks delivery time With twelve blades, the Allpa 500380 outboard impeller enhances water movement efficiency through its compact measurements.
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$ 19.16
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1-2 weeks delivery time The Allpa 500317 impeller, designed for outboard use, has ten blades and larger dimensions suited for demanding performance.
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$ 26.01
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1-2 weeks delivery time This Allpa 500394 outboard impeller features ten blades and a shorter length, offering a compact yet effective design.
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$ 17.53
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1-2 weeks delivery time The Allpa 500181 impeller includes twelve blades and a long length of 73 mm, along with a gasket for secure fitting and reliable operation.
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$ 133.55
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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.