{"product_id":"21121-3710-ignition-coil-for-kawasaki-stx-1100-1997-1999","title":"21121-3710 Ignition Coil for Kawasaki STX 1100 1997-1999","description":"\u003ch2\u003eIgnition Coil for Kawasaki STX 1100\u003c\/h2\u003e\u003cp\u003eThis ignition coil delivers the spark energy needed to fire the plugs on your personal watercraft, and it cross-references OEM part 21121-3710.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis ignition coil is a direct replacement spark component for the Kawasaki STX 1100, providing reliable high-voltage output to the spark plugs. A failed ignition coil causes hard starting, misfires, or a dead cylinder, so replacing it restores consistent combustion. Designed for riders and mechanics servicing 1997 to 1999 STX 1100 models, this coil keeps your engine firing on every revolution.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eWound primary and secondary coils deliver a strong, consistent spark across the rev range\u003c\/li\u003e\n\u003cli\u003eSealed housing resists water intrusion common in marine engine bays\u003c\/li\u003e\n\u003cli\u003eDirect-fit mounting matches the original coil footprint for straightforward installation\u003c\/li\u003e\n\u003cli\u003eHeat-resistant construction withstands the temperatures of a running PWC engine\u003c\/li\u003e\n\u003cli\u003eTerminals positioned to match the OEM connector layout\u003c\/li\u003e\n\u003cli\u003eCross-references OEM part number 21121-3710\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Kawasaki STX 1100, 1997-1999\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReplacing a coil that has failed and caused a no-spark condition\u003c\/li\u003e\n\u003cli\u003eRoutine ignition system service on older STX 1100 watercraft\u003c\/li\u003e\n\u003cli\u003eTroubleshooting misfires and hard-starting issues\u003c\/li\u003e\n\u003cli\u003eKeeping a spare coil on hand for race or rental fleet maintenance\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\u003e21121-3710\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIgnition coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKawasaki STX 1100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1997-1999\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 How do I know if my ignition coil is failing? \u003cstrong\u003eA:\u003c\/strong\u003e Common signs include hard starting, misfires, rough idle, and a weak or absent spark at the plug. Testing the coil resistance with a multimeter against the service spec confirms whether replacement is needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I replace just one coil? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this coil can be replaced individually if only one has failed. If your machine uses multiple coils and they are the same age, some riders replace them as a set for even ignition performance.\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":51073093566550,"sku":"OO1C17903","price":109.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_d32fc1c8-46f5-4359-a290-b6e79e0cc7aa.jpg?v=1794480014","url":"https:\/\/www.solidspare.com\/products\/21121-3710-ignition-coil-for-kawasaki-stx-1100-1997-1999","provider":"Solid Spare","version":"1.0","type":"link"}