{"product_id":"420854358-power-valve-for-sea-doo-speedster-800-1998-1999","title":"420854358 Power Valve for Sea-Doo Speedster 800 1998-1999","description":"\u003ch2\u003ePower Valve for Sea-Doo Speedster 800\u003c\/h2\u003e\u003cp\u003eThis power valve is a replacement exhaust component that regulates exhaust port timing on 1998 to 1999 Sea-Doo Speedster 800 models, cross-referencing OEM part 420854358.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis power valve serves the exhaust system of the Sea-Doo Speedster 800, opening and closing the exhaust port to sharpen low-end response and top-end pull. The 420854358 power valve is built as a direct replacement for worn or seized original units on 1998 and 1999 boats. It suits owners and mechanics maintaining a personal watercraft engine.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOEM cross-reference 420854358 for straightforward replacement\u003c\/li\u003e\n\u003cli\u003eControls exhaust port timing for improved throttle response across the rpm range\u003c\/li\u003e\n\u003cli\u003eConstructed to withstand continuous exhaust heat and moisture exposure\u003c\/li\u003e\n\u003cli\u003ePrecision fitment for the 800 series Rotax engine exhaust housing\u003c\/li\u003e\n\u003cli\u003eHelps restore lost power when an original valve sticks or wears\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Sea-Doo Speedster 800, 1998\u003c\/li\u003e\n\u003cli\u003efor Sea-Doo Speedster 800, 1999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRoutine exhaust maintenance on 800 series Rotax engines\u003c\/li\u003e\n\u003cli\u003eRebuilding a top end where power valve wear is present\u003c\/li\u003e\n\u003cli\u003eRestoring performance on a used Sea-Doo Speedster 800\u003c\/li\u003e\n\u003cli\u003eServicing a boat that has sat unused and developed a sticky valve\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e420854358\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eComponent Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePower Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExhaust Port Timing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSea-Doo Speedster 800, 1998-1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this an original Sea-Doo part? \u003cstrong\u003eA:\u003c\/strong\u003e This is an aftermarket replacement power valve cross-referenced to OEM 420854358. It fits the listed Sea-Doo Speedster 800 years but is not manufactured by Sea-Doo.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do I know if my power valve needs replacing? \u003cstrong\u003eA:\u003c\/strong\u003e Common signs include sluggish acceleration, a stuck or rattling valve, and visible carbon buildup or scoring on the valve body. Comparing the old part to the 420854358 number confirms the match.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":51060209975382,"sku":"OO1C02244","price":147.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_0ff11834-b50d-4fe4-84cc-b7bf650f55cf.jpg?v=1794307041","url":"https:\/\/www.solidspare.com\/products\/420854358-power-valve-for-sea-doo-speedster-800-1998-1999","provider":"Solid Spare","version":"1.0","type":"link"}