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 Osculati 52.400.00 is a small-format, 6-blade impeller designed for Yamaha 2-stroke outboard engines rated at 6 and 8 HP. It replaces OEM part number 6G1-44352-00 and ensures stable water pump performance in compact marine engines. With a 11.9 mm insert diameter (Ø A), 40 mm outer diameter (Ø B), and 18 mm height (C), this impeller is built from flexible elastomer to withstand temperature shifts and saltwater exposure during regular use in tenders, inflatables, and light boats.
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$ 34.98
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1-2 weeks delivery time Osculati 52.400.02 is a precision impeller designed for Yamaha outboard engines across both 2-stroke (9.9/15 HP) and 4-stroke (8/9.9 HP) models. Compatible with OEM references 682-44352-01 and 682-44352-00, this 6-blade impeller delivers stable water flow and cooling efficiency. It features a 13 mm shaft insert diameter (Ø A), 40 mm outer diameter (Ø B), and 22 mm height (C), ideal for small outboards operating under varying load and temperature conditions.
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$ 28.39
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1-2 weeks delivery time Osculati 52.400.08 is a high-efficiency outboard impeller for Yamaha 2-stroke engines rated at 20D and 25 HP. Built to replace OEM reference 6L2-44352-00, it ensures stable water flow and consistent engine cooling. The impeller features a 13.97 mm shaft insert diameter (Ø A), 51.2 mm outer diameter (Ø B), and 19.05 mm height (C), and is made from saltwater-resistant marine elastomer with a 6-blade configuration optimized for compact mid-range propulsion systems.
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$ 37.95
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1-2 weeks delivery time Osculati 52.400.07 is a high-volume 6-blade impeller developed for Yamaha 2-stroke outboard engines in the 60–90 HP range, including 60, 75, 80, 85, and 90 HP models. It replaces OEM reference 688-44352-03 and is constructed from marine-grade elastomer for reliable performance in saltwater and high-RPM environments. With a 20.1 mm insert diameter (Ø A), 58 mm outer diameter (Ø B), and 30 mm height (C), this impeller delivers efficient water flow to maintain optimal engine temperature during sustained use.
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$ 34.69
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1-2 weeks delivery time Osculati 52.400.12 is a high-capacity, heavy-duty impeller for Yamaha 4-stroke outboard engines rated at 300 and 350 HP. Built to replace OEM reference 6AW-44352-00, this model is designed for large-engine cooling systems operating under extreme load and temperature. It features a 24.6 mm shaft insert (Ø A), 89 mm outer diameter (Ø B), and 36 mm height (C), with a 6-blade configuration to maintain high water volume flow required by large-displacement V6/V8 engines.
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$ 40.45
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1-2 weeks delivery time Osculati 52.313.00 is a compact 6-blade rubber impeller designed for small 2-stroke outboards by Mercury, Tohatsu, and Evinrude, ranging from 2 to 3.3 HP. Compatible with OEM part numbers Mercury 47-95289/2, Tohatsu 309-65021-1/M, and Evinrude 114812, it ensures consistent water circulation for cooling even in compact engines. This impeller features a 12 mm inner diameter, 41 mm outer diameter, and 14 mm height, providing a precise fit and optimal performance for light-duty marine applications.
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$ 22.18
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1-2 weeks delivery time Osculati 52.300.09 is a compact six-blade impeller for Evinrude 2-stroke outboard engines rated at 1.5 to 6 HP. It replaces OEM part number 387361 and features a 10.94 mm internal diameter, 38.4 mm external diameter, and 17.8 mm height. This impeller is ideal for small displacement engines used in tenders and lightweight marine craft, ensuring stable cooling at low RPMs.
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$ 33.11
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1-2 weeks delivery time Osculati 52.300.08 is a six-blade water pump impeller designed for Evinrude outboards rated at 4 to 7 HP (2-stroke) and 4 to 6 HP (4-stroke, USA foot). It replaces OEM part numbers 389576 and 436137. With a 38.4 mm outer diameter, 11.2 mm hub, and 17.9 mm height, it guarantees stable cooling performance for light-duty marine engines.
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$ 29.56
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1-2 weeks delivery time Osculati 52.300.25 is a six-blade water pump impeller designed for Evinrude 2-stroke engines (8, 9.9, 15 HP from 1980 onward) and 4-stroke models of the same range with the USA-style foot. It replaces OEM part 386084 and features a 12.75 mm shaft diameter, 38.4 mm outer diameter, and 17.8 mm height. Engineered for compact marine engines requiring reliable cooling at low and mid-range RPM.
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$ 19.35
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1-2 weeks delivery time Osculati 52.300.26 is a six-blade water pump impeller compatible with Evinrude 2-stroke outboard engines rated at 25 and 35 HP, produced between 1977 and 1986. It replaces OEM part 388702 and features a 15.95 mm hub diameter, 51.2 mm outer diameter, and 19.05 mm height. Designed for reliable cooling and efficient water circulation in mid-range vintage outboards.
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$ 23.23
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1-2 weeks delivery time Osculati 52.300.29 is a six-blade replacement impeller for Evinrude 2-stroke outboard engines rated at 40 and 60 HP. Compatible with OEM part number 389589, it features a 16.04 mm shaft diameter, 69.2 mm outer diameter, and 22.25 mm height. This impeller is engineered to provide stable water circulation and effective cooling under variable loads in mid-range marine engines.
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$ 26.70
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1-2 weeks delivery time High-performance outboard impeller Osculati 52.300.31, compatible with Evinrude 305 and 389642 references, designed for both 2-stroke (V4/V6, 1980 models) and 4-stroke Sea Drive engines. Manufactured with marine-grade elastomers for enhanced durability, it features a 22.3 mm shaft insert (Ø A), 89 mm outer diameter (Ø B), 31.9 mm height (C), and 6 blades, ensuring optimal water circulation for engine cooling. Ideal for maintenance or replacement of OEM Evinrude parts.
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$ 38.49
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1-2 weeks delivery time Osculati 52.352.00 is a compact 6-blade impeller designed for Yamaha and Evinrude 40 HP 2-stroke outboard engines manufactured between 1990 and 1997. Built to replace OEM part 6F5-44352-00, it features a 15.8 mm shaft insert diameter (Ø A), 69.7 mm outer diameter (Ø B), and 22.3 mm height (C). Its marine-grade elastomer construction provides reliable cooling circulation, even in high-RPM conditions, ensuring long engine life and thermal stability.
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$ 30.07
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1-2 weeks delivery time This high-performance impeller (Osculati 52.367.00) is compatible with a wide range of Suzuki and Evinrude outboard engines, replacing OEM parts 17461-94511, 94510, 90J01, 90J00, and Evinrude 367. Designed for both 2-stroke and 4-stroke engines (up to 200 HP), it ensures optimal water flow for cooling efficiency. With six blades, a 24.4 mm internal hub diameter, and a total height of 31.7 mm, it's engineered for durability and reliable performance in marine environments.
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$ 34.05
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1-2 weeks delivery time Osculati 52.300.10 is a compact impeller with six blades designed for Evinrude 2-stroke outboards rated at 3, 4, 5, 5.5, and 6 HP. It replaces OEM references 277181 and 434424, featuring a 10.93 mm hub, 69 mm outer diameter, and 12.72 mm height. This impeller ensures reliable cooling performance for small engines used in portable and lightweight boats.
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$ 22.51
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1-2 weeks delivery time The Osculati 52.300.19 – Suzuki 17461-93902 & Evinrude 329 Impeller is a high-quality water pump impeller designed for Suzuki DT9.9/15 (2-stroke) and certain Evinrude outboards using a Suzuki-style foot. With a 13.2 mm shaft bore, 39.3 mm outer diameter, and 22 mm height, it features 6 flexible blades for stable water flow and long service life.
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$ 28.76
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1-2 weeks delivery time Osculati 52.300.20 is a six-blade rubber impeller compatible with classic Evinrude 2-stroke outboard motors rated at 10, 15, 18, 20, and 25 HP manufactured up to 1978. It replaces OEM part numbers 375638 and 775518 and features a 12.75 mm inner diameter, 69 mm outer diameter, and 12.72 mm height. Designed for reliable cooling in vintage marine engines.
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$ 23.10
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Suzuki 17461-96301-96311-96312 & Evinrude 5031417 5031744 362 Outboard Impeller - Osculati 52.362.00
1-2 weeks delivery time The Osculati 52.362.00 impeller is designed for Suzuki and Evinrude outboard motors, compatible with a range of 2-stroke and 4-stroke engines from 20 to 50 HP, including models like DT20, DT25, DT30, DT40VE, DT50. Fully interchangeable with OEM codes Suzuki 17461-96301 / 96311 / 96312 and Evinrude 5031417 / 5031744, this 6-blade rotor features a 67 mm outer diameter, 17.1 mm inner bore, and a height of 16.5 mm, ensuring efficient cooling and optimal flow rates under marine operating conditions.
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$ 38.46
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1-2 weeks delivery time The Osculati 52.365.00 outboard impeller is designed for Suzuki 2-stroke engines DT90 and DT100, as well as 4-stroke models 60 and 70 HP, and is interchangeable with OEM parts 17461-87E00, 87E10, and 87E11, along with Evinrude code 365. It features a 6-blade marine rubber rotor, an outer diameter of 78.3 mm, inner bore of 22.2 mm, and height of 26 mm, delivering strong and consistent water flow for reliable engine cooling under load.
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$ 44.85
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1-2 weeks delivery time Osculati 52.353.00 is a compact and efficient impeller designed for Evinrude 2-stroke outboard engines in the 40–70 HP range. Compatible with OEM reference 390286, it features a 17.5 mm shaft insert (Ø A), 51.2 mm outer diameter (Ø B), and 19.05 mm height (C). Its 6-blade layout is optimized for stable and continuous water flow, ensuring effective engine cooling during high-load operation in both freshwater and marine environments.
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$ 30.17
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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.