{"product_id":"kit-joints-pompe-eau-420650370-420950840-420650310-sea-doo-williams","title":"Sea-Doo \u0026 Williams Water Pump Seal Kit – 420650370 \/ 420950840 \/ 420650310","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThis \u003cstrong\u003ewater pump seal kit\u003c\/strong\u003e, OEM part numbers \u003cstrong\u003e420650370 \/ 420950840 \/ 420650310\u003c\/strong\u003e, allows you to replace the relevant sealing elements during a water pump overhaul or repair. It is available for the Sea-Doo 4-TEC and Williams boats listed below, with \u003ca href=\"\/en\/blogs\/ressources-techniques-moteurs-rotax\/moteur-rotax-1503\"\u003eRotax 1503\u003c\/a\u003e and \u003ca href=\"\/en\/blogs\/ressources-techniques-moteurs-rotax\/moteur-rotax-1630\"\u003eRotax 1630\u003c\/a\u003e engines, depending on the configuration and original part numbers. Choose the mechanical seal, oil seal, O-ring, or the set of all three elements depending on the desired variant.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eOEM part numbers:\u003c\/strong\u003e 420650370, 420950840 and 420650310\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eRotating mechanical seal:\u003c\/strong\u003e 420650370\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWater pump housing O-ring:\u003c\/strong\u003e 420950840, also listed as 290950840\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eOil seal:\u003c\/strong\u003e 420650310, former part number 711650310\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eType:\u003c\/strong\u003e water pump seals\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e one seal individually or a set of all three seals, depending on the variant selected; pump, shaft and cover not included in this seal set\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWeight:\u003c\/strong\u003e not specified by variant\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eRegulated substances:\u003c\/strong\u003e information not provided\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e check the part numbers and configuration, follow the workshop procedure and use the appropriate tools for installing the mechanical seal; check the condition of the mating surfaces and the sealing after installation\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eSea-Doo Jet Ski Compatibility\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eModels equipped with the Rotax 1503 (4-TEC)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2002 to 2015 – GTX \/ GTX Limited\u003c\/strong\u003e (155, 215, 255, 260 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2006 to 2019 – GTI \/ GTI SE\u003c\/strong\u003e (130, 155 hp): some base versions retained the 1503 after 2016\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2004 to 2015 – RXP \/ RXP-X\u003c\/strong\u003e (215, 255, 260 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2005 to 2015 – RXT \/ RXT-X\u003c\/strong\u003e (215, 255, 260 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2004 to 2015 – Wake \/ Wake Pro\u003c\/strong\u003e (155, 215 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2012 to 2016 – GTR\u003c\/strong\u003e (215 hp)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eModels equipped with the Rotax 1630 ACE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2016 to present – RXP-X\u003c\/strong\u003e (300, 325 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2016 to present – RXT-X\u003c\/strong\u003e (300, 325 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2016 to present – GTX \/ GTX Limited\u003c\/strong\u003e (170, 230, 300 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2017 to present – GTR \/ GTR-X\u003c\/strong\u003e (230, 300 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2016 to present – Wake Pro\u003c\/strong\u003e (230 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2020 to present – GTI \/ GTI SE\u003c\/strong\u003e (130, 170 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2019 to present – FishPro (Sport \/ Trophy \/ Scout)\u003c\/strong\u003e (130, 170 hp)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2023 to present – Explorer Pro\u003c\/strong\u003e (170, 230 hp)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eWilliams Boat Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWilliams 400 Sportjet\u003c\/strong\u003e (Rotax 1503)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWilliams 435 Sportjet\u003c\/strong\u003e (Rotax 1503)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWilliams 435 Sportjet\u003c\/strong\u003e (Rotax 1630)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWilliams 460 Sportjet\u003c\/strong\u003e (Rotax 1503)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWilliams 460 Sportjet\u003c\/strong\u003e (Rotax 1630)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e\u003ca href=\"\/en\/blogs\/ressources-techniques-annexes-williams\/williams-520-sportjet-rotax-1503\" style=\"font: inherit; color: inherit;\"\u003eWilliams 520 Sportjet\u003c\/a\u003e\u003c\/strong\u003e (Rotax 1503)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e\u003ca href=\"\/en\/blogs\/ressources-techniques-annexes-williams\/williams-520-sportjet-rotax-1630\" style=\"font: inherit; color: inherit;\"\u003eWilliams 520 Sportjet\u003c\/a\u003e\u003c\/strong\u003e (Rotax 1630)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp style=\"text-align: justify;\"\u003e\u003cem\u003e⚠️ Always check your serial number (VIN) and the original OEM part number before ordering to confirm exact compatibility with your model.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eWhy Replace Water Pump Seals?\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eWear of the water pump sealing elements can cause leaks and compromise the proper operation of the cooling system. A diagnosis allows you to identify the affected seal and check the condition of the pump before replacement.\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eCoolant or oil leak identified at the pump\u003c\/li\u003e\n\n\u003cli\u003eO-ring cut, flattened or deteriorated\u003c\/li\u003e\n\n\u003cli\u003eMechanical seal or oil seal damaged during disassembly\u003c\/li\u003e\n\n\u003cli\u003eLeak traces requiring inspection of the seals and mating surfaces\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp style=\"text-align: justify;\"\u003eInspect the sealing during maintenance and before seasonal commissioning. During work on the water pump, check the support surfaces and replace the seals according to their condition and the recommendations of the workshop procedure. Check for leaks after reassembly.\u003c\/p\u003e\n\u003ch2\u003eSee Also – Other Oil System Parts\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThese two parts concern the oil pump and are sold separately from this water pump seal kit. Check their own compatibilities: they are not necessarily suitable for all applications listed above.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"width: 50%; padding: 12px; text-align: center; vertical-align: top;\"\u003e\n\n\u003ca href=\"\/en\/products\/cache-pompe-a-huile-sea-doo-420811590-290811590-gtx-gti-rxt-rxp-2002-2017\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0982\/5379\/9754\/files\/Couvercle_pompe_a_huile_420811590_290811590.webp?v=1786965022\" alt=\"Sea-Doo Oil Pump Cover 420811590 290811590\" style=\"width: 100%; max-width: 220px; border-radius: 6px;\"\u003e\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"\/en\/products\/cache-pompe-a-huile-sea-doo-420811590-290811590-gtx-gti-rxt-rxp-2002-2017\"\u003e\u003cstrong\u003eSea-Doo Oil Pump Cover – 420811590 \/ 290811590\u003c\/strong\u003e\u003c\/a\u003e\n\n\u003c\/td\u003e\n\n\u003ctd style=\"width: 50%; padding: 12px; text-align: center; vertical-align: top;\"\u003e\n\n\u003ca href=\"\/en\/products\/kit-pompe-huile-secondaire-420837543-290956675-sea-doo-williams\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0982\/5379\/9754\/files\/S1453663ea38e4dfc86bee72291159f9c0.webp?v=1764372251\" alt=\"Sea-Doo Williams Secondary Oil Pump Kit 420837543 290956675\" style=\"width: 100%; max-width: 220px; border-radius: 6px;\"\u003e\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"\/en\/products\/kit-pompe-huile-secondaire-420837543-290956675-sea-doo-williams\"\u003e\u003cstrong\u003eSea-Doo \u0026amp; Williams Secondary Oil Pump Kit – 420837543 \/ 290956675\u003c\/strong\u003e\u003c\/a\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e","brand":"ROTAX tender parts","offers":[{"title":"420650370 - water seal","offer_id":53458348638538,"sku":"14:29#water seal","price":40.0,"currency_code":"EUR","in_stock":true},{"title":"420650310 - oil seal","offer_id":53458348671306,"sku":"14:173#oil seal","price":30.0,"currency_code":"EUR","in_stock":true},{"title":"420950840 - ring","offer_id":53458348704074,"sku":"14:10#ring","price":30.0,"currency_code":"EUR","in_stock":true},{"title":"Complete 3-piece set","offer_id":53458348736842,"sku":"14:350853#all","price":79.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/5379\/9754\/files\/S9fdaeb5c690d4665bd4d0f5d267cd2284.webp?v=1764185680","url":"https:\/\/rotaxtenderparts.com\/en\/products\/kit-joints-pompe-eau-420650370-420950840-420650310-sea-doo-williams","provider":"ROTAX tender parts","version":"1.0","type":"link"}