The water pump impeller is a crucial component in outboard motors, responsible for circulating water through the engine's cooling system to prevent overheating.
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1-2 weeks delivery time The Osculati 52.383.00 – Tohatsu 334-65021-0/M 383 Impeller is a high-efficiency 8-blade rubber impeller compatible with both 2-stroke and 4-stroke Tohatsu engines in the 9.9/15/18 HP range. Matching OEM code 334-65021-0/M, it features a 13.97 mm bore, 40.8 mm outer diameter, and 23.4 mm height—ensuring excellent water flow and long service life in marine conditions.
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$ 29.78
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1-2 weeks delivery time The Osculati 52.382.00 – Tohatsu 345-65021-0/M, 3R0-650-210M 382 Impeller is designed for both 2-stroke (25/30/40 HP) and 4-stroke (25/30 HP) outboard engines. With a 17.2 mm shaft bore, 44.25 mm outer diameter, and 20.25 mm height, it features 6 rubber blades and matches OEM references 345-65021-0/M and 3R0-650-210M. A critical component for engine cooling, ideal for routine replacement.
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$ 27.74
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1-2 weeks delivery time The Osculati 52.379.00 – Tohatsu 3C8-65021-2/M 379 Impeller is a precision-molded rubber impeller designed for 2-stroke outboard engines with 40, 50, 70, and 90 HP. It matches OEM reference 3C8-65021-2/M and features 6 flexible blades, ensuring optimal water flow and engine cooling. With a shaft bore of 17.2 mm, an outer diameter of 50.4 mm, and a height of 20.2 mm, it's ideal for routine maintenance and high-performance marine use.
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$ 29.68
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1-2 weeks delivery time The Osculati 52.388.00 – Tohatsu 3C7-65021-1 / 3B7-65021-2 388 Impeller is a heavy-duty water pump impeller for high-power 2-stroke Tohatsu outboards ranging from 60 to 140 HP. It features a 20.3 mm bore, 65.75 mm outer diameter, and 35.2 mm height, with 6 rubber blades for maximum water flow. This OEM-equivalent replacement ensures stable cooling performance under high-load operation.
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$ 56.13
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1-2 weeks delivery time Osculati 52.314.00 is a compact rubber impeller designed for Mercury 2-stroke outboards from 3.5 to 9.9 HP manufactured since 1980. Replaces OEM part numbers 47-68988 and 47-89980. With a 6-blade design, 11 mm shaft bore, and 32 mm outer diameter, this impeller ensures reliable water flow and efficient engine cooling in legacy portable outboards. Ideal for service, maintenance, or water pump overhauls.
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$ 23
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1-2 weeks delivery time Osculati 52.320.01 is a flexible impeller for Mercury 2-stroke outboards from 4 to 10 HP, replacing OEM part numbers 47-65957 and 47-89981. Designed for efficient cooling in compact engines, it features a 6-blade rubber structure with a precise 11.6 mm bore, 32 mm outer diameter, and 14.4 mm height. This impeller provides consistent water flow to prevent overheating, making it ideal for seasonal maintenance or full pump rebuilds in small outboard models.
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$ 22.51
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1-2 weeks delivery time Osculati 52.315.00 is a high-performance rubber impeller designed for Mercury, Tohatsu, and Parsun outboards in the 4 to 6 HP range, covering both 2-stroke and 4-stroke variants. This model replaces Mercury 47-16154-3, Tohatsu 369-65021-1/M, and Parsun T5-03000300 references. Engineered for durability and consistent flow, it provides reliable cooling and protects engines from overheating. The impeller has a 10.25 mm bore, 33.6 mm diameter, and 14.2 mm height.
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$ 25.75
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1-2 weeks delivery time Osculati 52.400.01 is a high-precision impeller for compact 4–5 HP outboards from Mercury, Yamaha, Selva, and Parsun. Compatible with OEM codes such as Mercury 47-96305M and Yamaha 6E0-44352-00, this 6-blade rubber impeller ensures reliable engine cooling in small 2- and 4-stroke marine engines. With a 40 mm outer diameter and 11 mm bore, it fits tightly into OEM housings and performs optimally under continuous use.
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$ 21.13
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1-2 weeks delivery time Osculati 52.400.03 is a 6-blade rubber impeller engineered for Mercury and Yamaha 2-stroke outboards in the 6 to 8 HP range. It directly replaces Mercury 47-95611M and Yamaha 662-44352-01-00, maintaining optimal water pump efficiency and protecting engines from overheating. With a 14 mm bore, 40 mm outer diameter, and 22 mm height, it fits snugly into original housings for reliable and consistent cooling performance.
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$ 26.32
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1-2 weeks delivery time Osculati 52.320.00 is a replacement impeller for Mercury 2-stroke outboards in the 6 to 9.8 HP range. Compatible with OEM part number 47-22748, this 6-blade rubber impeller is designed for efficient water circulation in compact engines. With precise dimensions (11.6 mm inner bore, 32 mm outer diameter, 14.4 mm height), it delivers optimal cooling and fits securely in legacy water pump housings. Ideal for annual maintenance or full pump rebuilds.
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$ 30.04
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1-2 weeks delivery time Osculati 52.318.00 is a flexible rubber impeller designed for Mercury outboards in the 6–15 HP range, covering both 2-stroke and 4-stroke models. Replacing OEM part number 47-42038, it ensures consistent water pump operation and protects engines from overheating. With a 13 mm shaft bore and 58.8 mm outer diameter, it is built for reliability, quick installation, and long-lasting performance in compact marine engines.
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$ 32.36
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1-2 weeks delivery time Osculati 52.320.02 is a rubber impeller designed for Mercury 2-stroke outboards in the 20 to 30 HP range. Replacing OEM part numbers 47-65958 and 47-89982, it ensures reliable water circulation in mid-range 2-stroke engines. With a 6-blade configuration, 11.6 mm inner bore, 32 mm outer diameter, and 14.4 mm height, it provides consistent cooling and fits OEM pump housings precisely.
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$ 24.30
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1-2 weeks delivery time Osculati 52.320.05 is a durable 6-blade impeller designed for Mercury 2-stroke outboards (18–40 HP) and 4-stroke engines (25–40 HP), including post-1996 models. It replaces OEM part numbers 47-85089-1 and 47-85089-3. Built from flexible, wear-resistant rubber, this impeller ensures consistent water circulation and optimal engine cooling. Its precise fit (16 mm shaft, 73 mm diameter) guarantees long-lasting pump efficiency under both freshwater and saltwater use.
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$ 26.42
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1-2 weeks delivery time Osculati 52.320.03 is a high-performance rubber impeller designed for mid-range 2-stroke outboards from Mercury and Suzuki. It replaces Mercury part numbers 47-20268, 47-65959, and 47-89983T, as well as Suzuki 17461-95201. Suitable for 3-cylinder Mercury engines (30–70 HP) and 4-cylinder models (40–125 HP), this 6-blade impeller ensures powerful water circulation to keep your engine operating within safe temperature ranges. Its large 19.13 mm bore and 51.8 mm diameter are engineered for secure fit and OEM-grade reliability.
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$ 25.45
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1-2 weeks delivery time Osculati 52.378.00 is a heavy-duty impeller designed for Mercury 4-stroke outboards in the 40–60 HP range. Replacing OEM part number 47-19453T, this 6-blade rubber impeller ensures efficient water flow through the cooling system, protecting your engine from overheating. With its 19.25 mm inner bore, 78.2 mm outer diameter, and 25.15 mm height, it’s ideal for annual maintenance or pump rebuilds in mid-range Mercury 4-stroke engines.
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$ 36.37
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1-2 weeks delivery time Osculati 52.320.04 is a high-performance impeller specifically designed for Mercury EFI and Optimax 2-stroke outboards from 65 to 225 HP. This heavy-duty 6-blade rubber impeller replaces multiple OEM references, including 47-65960, 47-89984, 47-803631T, and others. Engineered with a 22.3 mm bore, 60 mm diameter, and 33.8 mm height, it delivers superior water flow to support advanced high-output engines under demanding marine conditions. Includes gasket.
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$ 36.83
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1-2 weeks delivery time Osculati 52.400.11 is a high-volume 6-blade water pump impeller designed for powerful 2-stroke and 4-stroke outboards ranging from 115 to 300 HP. Fully compatible with Mercury, Yamaha, and Selva engines, this model replaces OEM references such as Mercury 47-898689 and Yamaha 6E5-44352-00/01. With a large 89 mm outer diameter and 22.4 mm inner bore, this impeller delivers optimal water flow to protect high-performance engines from overheating under demanding marine conditions.
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$ 41.28
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1-2 weeks delivery time Osculati 52.400.04 is a precision-molded 6-blade impeller designed for Yamaha and Mercury 2-stroke outboards rated at 25 and 30 HP. Fully compatible with OEM codes Yamaha 689-44352-02 and Mercury 47-84797M, this impeller ensures optimal water pump performance, safeguarding the engine against overheating. Its 16.15 mm bore and 69.5 mm outer diameter provide a secure OEM-level fit, while the 12.72 mm height ensures smooth operation under high load.
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$ 34.30
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1-2 weeks delivery time Osculati 52.344.00 is a reliable replacement impeller for Mercury, Tohatsu, and Parsun small outboards ranging from 4 to 9.8 HP. Compatible with OEM references including Mercury 47-436065-2, Tohatsu 3B2-65021-1/M, and Parsun F8-04000200, this 6-blade rubber impeller ensures optimal engine cooling by maintaining a steady water flow. With a 12 mm bore, 40 mm outer diameter, and 18 mm height, it’s ideal for routine pump servicing and maintenance.
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$ 28.05
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1-2 weeks delivery time Osculati 52.400.10 is an ultra-compact 6-blade impeller designed for Yamaha 2-stroke outboard engines rated at 2 HP. It replaces OEM reference 646-44352-01 and is optimized for lightweight, portable engines often used on tenders, inflatables, and small utility boats. With a 11.15 mm insert diameter (Ø A), 47.5 mm outer diameter (Ø B), and 13.7 mm height (C), this impeller ensures consistent cooling flow at low RPM and under minimal water pressure conditions.
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$ 34.05
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What is the function of an impeller in an outboard motor?
The impeller in an outboard motor is a flexible, rubber component housed within the water pump. Its primary function is to draw water from outside the boat and circulate it through the engine's cooling system, preventing overheating. Regular inspection and timely replacement of the impeller are crucial, as wear or damage can lead to engine failure. Utilizing appropriate tools, such as an impeller puller, can facilitate safe removal and installation during maintenance procedures.
For genuine replacement parts, see our range of Boat Impeller.
For models designed specifically for Evinrude engines, explore our selection of Evinrude Impeller options. We also offer a dedicated range of Mercury Impeller replacements for those maintaining Mercury outboard motors, ensuring optimal performance and compatibility.
What are the differences between a standart outboard impeller and a raw water pump impeller in outboard motors?
A standard outboard impeller is typically designed for general cooling system operation, ensuring a steady water flow through the pump housing and engine. A raw water pump impeller, on the other hand, is specifically built to handle unfiltered seawater, requiring a more flexible impeller material to resist wear and debris. Regular impeller service, including replacing the old impeller with a new one and applying lubricant to the shaft and seal, helps maintain optimal performance and prevent gear damage.
For those servicing their outboard motor, a proper Honda Impeller Replacement ensures efficient cooling and engine longevity.
What are the signs that indicate an outboard engine needs an impeller service?
Signs that an outboard engine needs an impeller service include reduced water flow from the telltale, overheating, or unusual noises from the water pump housing. If the engine temperature rises abnormally, it may indicate that the water pump impeller is worn or damaged, requiring removal and replacement with a new impeller from a repair kit. Routine inspection and proper installation following the brand’s instructions help maintain performance and prevent issues related to overheating and insufficient cooling.
For Tohatsu engines, a high-quality Tohatsu Impellers is essential for maintaining optimal water circulation and preventing engine damage. Regularly checking and replacing the Tohatsu impeller ensures efficient cooling, prolonging the life of your outboard motor and keeping it in peak condition for all your boating adventures.