{"product_id":"southmarine-neoprene-12-blade-water-pump-impeller-for-johnson-09-812b-yamaha-6ta-12457-00-brass-hub-12-tooth-spline-2-25-di","title":"SouthMarine Neoprene 12-Blade Water Pump Impeller for Johnson 09-812B \/ Yamaha 6TA-12457-00 — Brass Hub, 12-Tooth Spline, 2.25\" Di","description":"\u003cp\u003e\u003cstrong\u003eSouthMarine's neoprene 12-blade water pump impeller is a direct-fit replacement for Johnson 09-812B \/ 09-812B-1 and Yamaha 6TA-12457-00 applications, featuring a brass hub and 12-tooth spline drive for reliable engine cooling circulation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis impeller is designed for inboard marine cooling systems that require a compact, durable rotor to move seawater through heat exchangers and jackets. Built from neoprene with a brass hub and a 12-tooth spline, the unit measures 2.25\" (57.1 mm) in diameter and 1.90\" (48.2 mm) in depth and fits a 5\/8\" (16 mm) shaft. It replaces a wide range of original-equipment and aftermarket part numbers across Johnson, Yamaha, Volvo Penta, Jabsco and more, making it a versatile spare for engine maintenance or seasonal service.\u003c\/p\u003e\n\n\u003ch3\u003eWill this impeller fit my Johnson or Yamaha engine?\u003c\/h3\u003e\n\n\u003cp\u003eYes—this SouthMarine impeller is made to match the dimensions and spline count of the Johnson 09-812B \/ 09-812B-1 and Yamaha 6TA-12457-00 originals. Confirm the physical measurements and spline count on your current impeller before installation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDiameter: 2.25\" (57.1 mm)\u003c\/li\u003e\n  \u003cli\u003eDepth: 1.90\" (48.2 mm)\u003c\/li\u003e\n  \u003cli\u003eShaft size: 5\/8\" (16 mm)\u003c\/li\u003e\n  \u003cli\u003eSpline drive: 12-tooth\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and construction qualities does this impeller have?\u003c\/h3\u003e\n\n\u003cp\u003eThe rotor blades are molded from durable neoprene to resist flex fatigue in freshwater and saltwater environments, while the central brass hub provides secure mounting to the drive shaft. The 12-blade layout improves water flow consistency and reduces vibration compared with fewer-blade designs.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eNeoprene blade material for flexibility and wear resistance\u003c\/li\u003e\n  \u003cli\u003eBrass hub for corrosion resistance and stable fit\u003c\/li\u003e\n  \u003cli\u003e12 blades to maintain steady pump output and lower pulsation\u003c\/li\u003e\n  \u003cli\u003ePrecision spline to minimize slippage on the shaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this impeller compare to other replacement part numbers?\u003c\/h3\u003e\n\n\u003cp\u003eSouthMarine’s impeller is manufactured to match OEM geometry and fits a variety of equivalent part numbers across multiple brands, so it can replace several commonly stocked items without modifying the pump housing. It's intended as a direct swap for many Johnson, Yamaha, Volvo Penta, Jabsco, Sierra and other inboard impellers listed by cross-reference.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eReplaces Johnson 09-812B and 09-812B-1\u003c\/li\u003e\n  \u003cli\u003eCompatible with Yamaha 6TA-12457-00 and Sierra 18-3306\u003c\/li\u003e\n  \u003cli\u003eFits Volvo Penta references like 21951354 and 21951352\u003c\/li\u003e\n  \u003cli\u003eAlso cross-references Jabsco 13554-0001 and Indmar S685007\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check during installation and maintenance?\u003c\/h3\u003e\n\n\u003cp\u003eInspect the impeller housing, drive key or spline, and inlet\/outlet hoses when replacing the impeller. Proper seating, lubrication with a water pump lubricant or light silicone grease, and verifying rotation direction ensure the pump performs correctly after installation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCheck pump housing for corrosion or scoring\u003c\/li\u003e\n  \u003cli\u003eConfirm spline engagement and hub tightness\u003c\/li\u003e\n  \u003cli\u003eLubricate blades lightly for easier insertion\u003c\/li\u003e\n  \u003cli\u003eRun the engine briefly to verify steady water flow and no leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Boaters, mechanics and fleet managers who need a reliable, OEM-compatible replacement impeller for small- and medium-displacement inboard engines will find this SouthMarine unit useful. It's ideal as a seasonal service part or emergency spare for vessels using Johnson, Yamaha, Volvo Penta, Jabsco and similar cooling systems. Purchase this impeller if you want a direct-fit neoprene rotor with a brass hub, 12-blade design and 12-tooth spline for a 5\/8\" shaft.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this impeller fit a 5\/8\" shaft?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The impeller accepts a 5\/8\" (16 mm) shaft and uses a 12-tooth spline for secure engagement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the material suitable for saltwater use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The neoprene blades and brass hub are chosen for durability and corrosion resistance in marine environments.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SouthMarine","offers":[{"title":"Default Title","offer_id":48084347519134,"sku":"B01MR2JFI9","price":30.04,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/southmarine-impeller-front-view.jpg?v=1785851179","url":"https:\/\/northtrailauto.ca\/products\/southmarine-neoprene-12-blade-water-pump-impeller-for-johnson-09-812b-yamaha-6ta-12457-00-brass-hub-12-tooth-spline-2-25-di","provider":"North Trail Auto","version":"1.0","type":"link"}