{"product_id":"kit-piston-sea-doo-4-tec-420890244-gtx-rxt-rxp-gtr","title":"Sea-Doo 4-TEC Piston Kit STD – OEM 420890244 – GTX RXT RXP GTR 215\/255\/260 hp (2008-2018)","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThis piston kit is designed for supercharged Sea-Doo Rotax 1503 4-TEC engines, available in standard size (STD) or oversized (+0.5mm). It corresponds to OEM part number \u003cstrong\u003e420890244\u003c\/strong\u003e and includes the piston along with its ring set (top ring, sealing ring, and oil control ring) and assembly accessories. The assembly ensures compression in the combustion chamber, controls oil consumption, and facilitates thermal transfer to the cylinder sleeve. It is used for preventive maintenance during engine overhauls or cylinder honing, as well as for replacement following a loss of compression, overheating, or engine failure.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eOEM Reference: \u003cstrong\u003e420890244\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eManufacturer Reference: 4-TEC piston kit STD (big bore)\u003c\/li\u003e\n\n\u003cli\u003eType: Complete piston kit with rings, standard size\u003c\/li\u003e\n\n\u003cli\u003eCondition: New\u003c\/li\u003e\n\n\u003cli\u003ePackaging: 1 kit for 3 cylinders (pistons, rings, wrist pins, circlips)\u003c\/li\u003e\n\n\u003cli\u003eWeight: 650 g\u003c\/li\u003e\n\n\u003cli\u003eRegulated substances: none\u003c\/li\u003e\n\n\u003cli\u003eInstallation: engine assembly by a qualified mechanic, observe end gap and ring positioning\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThis piston kit is compatible with Sea-Doo personal watercraft equipped with the Rotax 1503 4-TEC engine in 215, 255, and 260 hp versions, produced between 2007 and 2018:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e2007: \u003cstrong\u003eGTX 155 Wake\u003c\/strong\u003e, \u003cstrong\u003eGTX 215 Wake\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2008: \u003cstrong\u003eGTX 215\u003c\/strong\u003e, \u003cstrong\u003eGTX 215 Limited\u003c\/strong\u003e, \u003cstrong\u003eGTX 215 Wake\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2009: \u003cstrong\u003eGTX 215\u003c\/strong\u003e, \u003cstrong\u003eGTX 255 Limited iS\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2010: \u003cstrong\u003eGTX 215 iS\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2011: \u003cstrong\u003eGTX 215\u003c\/strong\u003e, \u003cstrong\u003eGTX 215 iS\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2012: \u003cstrong\u003eGTR 215\u003c\/strong\u003e, \u003cstrong\u003eGTX 215\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2013: \u003cstrong\u003eGTR 215\u003c\/strong\u003e, \u003cstrong\u003eGTX 215\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2014: \u003cstrong\u003eGTR 215\u003c\/strong\u003e, \u003cstrong\u003eGTX 215 Limited\u003c\/strong\u003e, \u003cstrong\u003eGTX 260 Limited iS\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e2015: \u003cstrong\u003eGTR 215\u003c\/strong\u003e, \u003cstrong\u003eGTX 215 Limited\u003c\/strong\u003e, \u003cstrong\u003eGTX 260 Limited iS\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eAlso the \u003cstrong\u003eRXP\u003c\/strong\u003e and \u003cstrong\u003eRXT\u003c\/strong\u003e models equipped with the 1503 4-TEC 215\/255\/260 hp engine\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eAlso compatible with \u003cstrong\u003eWilliams Tender\u003c\/strong\u003e boats equipped with the Rotax 1503 engine:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWilliams 435 Sportjet\u003c\/strong\u003e (Rotax ACE 1503)\u003c\/li\u003e\n\n\u003cli\u003e\u003cstrong\u003eWilliams 400 Sportjet\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cstrong\u003eWilliams 460 Sportjet\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cstrong\u003eWilliams 520 Sportjet\u003c\/strong\u003e\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 original OEM reference before ordering to confirm exact compatibility with your model.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eWhy Replace the Piston Kit?\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThe piston and its rings work constantly at very high temperatures and under high pressure. Over hours of operation, the piston becomes scored and the rings lose their tension, become clogged with carbon deposits, or break, which leads to a drop in compression, abnormal oil consumption, and eventually, scoring of the cylinder sleeve, which can destroy the engine.\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eDecreased power or top speed\u003c\/li\u003e\n\n\u003cli\u003eHard starting and irregular compression between cylinders\u003c\/li\u003e\n\n\u003cli\u003eBlue smoke from the exhaust\u003c\/li\u003e\n\n\u003cli\u003eIncreased oil consumption\u003c\/li\u003e\n\n\u003cli\u003eUnusual engine noise or knocking\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp style=\"text-align: justify;\"\u003eIt is recommended to replace the piston kit whenever the engine is opened, at the beginning of the season, or after approximately 50 hours of intensive navigation, in order to maintain compression and the lifespan of your Sea-Doo.\u003c\/p\u003e\n\u003ch2\u003eSee Also – Other Compatible Piston Kits\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"width: 50%; text-align: center;\"\u003e\n\n\u003ca href=\"\/en\/products\/for-sea-doo-1503-piston-kit-010-862k-std-size-04-17-420890244-420892735\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0982\/5379\/9754\/files\/S06cc441ff63540f4a0a44692376b0850E_aff35b9d-eaa2-4411-821d-477d1be95f2a.webp?v=1785441501\" alt=\"Sea-Doo 1503 4-TEC STD Piston Kit 420890244\" style=\"width: 100%; max-width: 220px; border-radius: 6px;\"\u003e\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"\/en\/products\/for-sea-doo-1503-piston-kit-010-862k-std-size-04-17-420890244-420892735\"\u003e\u003cstrong\u003eSea-Doo 1503 4-TEC STD Piston Kit – 010-862K – OEM 420890244 \/ 420892735\u003c\/strong\u003e\u003c\/a\u003e\n\n\u003c\/td\u003e\n\n\u003ctd style=\"width: 50%; text-align: center;\"\u003e\n\n\u003ca href=\"\/en\/products\/kit-piston-segments-sea-doo-300-cote-025mm-rxt-x-gtx-ltd-rxp-x-xrs-420892738\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0982\/5379\/9754\/files\/S03a51db7a33245b4be19858797e10c50O.webp?v=1785440270\" alt=\"Sea-Doo 300 Piston\/Ring Kit +0.25mm 420892738\" style=\"width: 100%; max-width: 220px; border-radius: 6px;\"\u003e\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"\/en\/products\/kit-piston-segments-sea-doo-300-cote-025mm-rxt-x-gtx-ltd-rxp-x-xrs-420892738\"\u003e\u003cstrong\u003eSea-Doo 300 Piston\/Ring Kit – +0.25 mm Size – RXT-X GTX LTD RXP-X XRS – OEM 420892738\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":"Standard Rating","offer_id":63625868509514,"sku":"14:173#Standard size;200007763:201336100","price":505.0,"currency_code":"EUR","in_stock":true},{"title":"Dimension +0.5mm","offer_id":63625868542282,"sku":"14:29#0.5 big bore;200007763:201336100","price":505.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/5379\/9754\/files\/Kit_piston_ring_SEADOO_420890244_420892735.png?v=1790024254","url":"https:\/\/rotaxtenderparts.com\/en\/products\/kit-piston-sea-doo-4-tec-420890244-gtx-rxt-rxp-gtr","provider":"ROTAX tender parts","version":"1.0","type":"link"}