{"product_id":"6s5-12121-00-00-exhaust-valve-for-yamaha-ar-190-1800-2012-2023","title":"6S5-12121-00-00 Exhaust Valve for Yamaha AR 190 1800 2012-2023","description":"\u003ch2\u003eExhaust Valve for Yamaha\u003c\/h2\u003e\u003cp\u003eThis exhaust valve, OEM cross-reference 6S5-12121-00-00, controls exhaust gas flow out of the cylinder head on Yamaha 1800 marine engines.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis exhaust valve is a direct-fit replacement for the Yamaha 1800 engine used in AR 190 and similar sport boat models. The valve seals combustion gases during the power stroke and opens at the right moment to release exhaust, keeping cylinder pressure and engine timing in balance. It suits boat owners and marine mechanics doing top-end service on a Yamaha 1800 engine.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOEM cross-reference 6S5-12121-00-00 for accurate matching\u003c\/li\u003e\n\u003cli\u003eValve head and stem sized for the Yamaha 1800 cylinder head\u003c\/li\u003e\n\u003cli\u003eHeat-resistant alloy construction suited to continuous marine exhaust temperatures\u003c\/li\u003e\n\u003cli\u003ePrecision-ground stem surface for smooth guide travel\u003c\/li\u003e\n\u003cli\u003eFaced valve head for a consistent seal against the seat\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha AR 190 (2012-2023)\u003c\/li\u003e\n\u003cli\u003efor Yamaha 1800 engine applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds on Yamaha 1800 marine engines\u003c\/li\u003e\n\u003cli\u003eCylinder head service after a burnt or leaking valve\u003c\/li\u003e\n\u003cli\u003eRoutine valve clearance and compression maintenance\u003c\/li\u003e\n\u003cli\u003eBoat yard repair work on AR 190 sport boats\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\u003e6S5-12121-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha 1800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eComponent\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExhaust Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2012-2023\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 How many exhaust valves does a Yamaha 1800 engine need? \u003cstrong\u003eA:\u003c\/strong\u003e The 1800 four-stroke engine uses one exhaust valve per cylinder, so order the quantity your head service requires. Confirm your engine configuration before purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Should exhaust valves be replaced as a set? \u003cstrong\u003eA:\u003c\/strong\u003e Many mechanics replace all valves in a serviced head at once to keep wear even across cylinders. Follow your service manual for the correct procedure.\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":51065559613526,"sku":"OO1C08138","price":50.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_a0eaff31-e2c1-444f-aeac-edb8ea0381c0.jpg?v=1794394592","url":"https:\/\/www.solidspare.com\/products\/6s5-12121-00-00-exhaust-valve-for-yamaha-ar-190-1800-2012-2023","provider":"Solid Spare","version":"1.0","type":"link"}