{"product_id":"ignition-coil-for-yamaha-outboard-115-225hp-v4-v6-replaces-oem-6r3-85570-01-00-sierra-18-5128","title":"Sierra 18-5128 Ignition Coil, Replaces Yamaha 6R3-85570-01-00, for 115\/130\/150HP Outboards","description":"\u003cp\u003eThe Sierra 18-5128 is an ignition coil built as a replacement for Yamaha outboard engines. The ignition coil is the component that steps up battery voltage into the high-voltage pulse needed at the spark plug, and a weak or failed coil is a common cause of hard starting, misfires, or a no-spark condition. This coil is designed as a direct fit for Yamaha 115HP, 130HP, and 150HP outboards (1994-04), 175HP (1994-95, 1997-98, 2000), 200HP (1994-98), 225HP (1997), B115HP (1998-99), and C115HP (1997-98) models, including late model V4 and V6 powerheads. It carries a female connector for a secure, correct-fit electrical connection and uses a screw-in or bolt-on mounting style for straightforward installation in place of the original unit. The coil directly replaces Yamaha OEM part number 6R3-85570-01-00, so it installs using the factory mounting points and wiring without modification. Each unit ships as a single ignition coil ready to install on the applicable Yamaha outboard powerhead. Whether you are restoring ignition performance on an aging outboard or proactively replacing a coil that is showing signs of wear, the Sierra 18-5128 is sized and configured to match the original Yamaha component it replaces.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-5128\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Ignition Coil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Yamaha Outboard Ignition Coils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282181291\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Gender:\u003c\/strong\u003e Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Screw-In or Bolt-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e Yamaha 6R3-85570-01-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha outboard 115HP, 130HP, 150HP (1994-04)\u003c\/li\u003e\n\u003cli\u003eYamaha outboard 175HP (1994-95, 1997-98, 2000)\u003c\/li\u003e\n\u003cli\u003eYamaha outboard 200HP (1994-98)\u003c\/li\u003e\n\u003cli\u003eYamaha outboard 225HP (1997)\u003c\/li\u003e\n\u003cli\u003eYamaha outboard B115HP (1998-99)\u003c\/li\u003e\n\u003cli\u003eYamaha outboard C115HP (1997-98)\u003c\/li\u003e\n\u003cli\u003eLate model Yamaha V4 \u0026amp; V6 outboard powerheads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha 6R3-85570-01-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5128 ignition coil replace?\u003c\/strong\u003e The Sierra 18-5128 is a direct replacement for Yamaha OEM ignition coil part number 6R3-85570-01-00, so it installs in place of the original coil without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Yamaha outboard models fit the 18-5128 ignition coil?\u003c\/strong\u003e This coil fits Yamaha outboard 115HP, 130HP, and 150HP models (1994-04), 175HP (1994-95, 1997-98, 2000), 200HP (1994-98), 225HP (1997), B115HP (1998-99), and C115HP (1997-98), including late model V4 and V6 powerheads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5128 weigh?\u003c\/strong\u003e The Sierra 18-5128 ignition coil weighs 0.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-5128 ignition coil?\u003c\/strong\u003e The Sierra 18-5128 measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5128 a genuine Yamaha part or aftermarket?\u003c\/strong\u003e The 18-5128 is a Sierra-branded aftermarket ignition coil manufactured as a direct replacement for Yamaha OEM part 6R3-85570-01-00, not an original Yamaha-branded component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of electrical connector does this ignition coil use?\u003c\/strong\u003e The Sierra 18-5128 uses a female connector, matching the factory Yamaha wiring harness for a secure fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the Sierra 18-5128 ignition coil installed?\u003c\/strong\u003e It uses a screw-in or bolt-on installation type, mounting at the same factory points as the original Yamaha 6R3-85570-01-00 coil it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many ignition coils come in one Sierra 18-5128 package?\u003c\/strong\u003e Each package contains one Sierra 18-5128 ignition coil, sold individually.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5128 fit a Yamaha B115HP or C115HP outboard?\u003c\/strong\u003e Yes, the Sierra 18-5128 is listed as fitting the Yamaha B115HP (1998-99) and C115HP (1997-98) outboard models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate the ignition coil needs to be replaced?\u003c\/strong\u003e A failing ignition coil like the one the Sierra 18-5128 replaces typically causes hard starting, engine misfires, or a no-spark condition on the affected cylinder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-5128 work on V4 and V6 Yamaha powerheads?\u003c\/strong\u003e Yes, the catalog lists this coil as fitting late model Yamaha V4 and V6 outboard powerheads in addition to the specific horsepower ratings noted.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-5128 ignition coil?\u003c\/strong\u003e The Sierra 18-5128 ignition coil has UPC 808282181291.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988199682267,"sku":"SIE-18-5128","price":61.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sie-18-5128_lg__52254.1654864906.500.750.jpg?v=1785189006","url":"https:\/\/www.goodvibesmarina.com\/products\/ignition-coil-for-yamaha-outboard-115-225hp-v4-v6-replaces-oem-6r3-85570-01-00-sierra-18-5128","provider":"Good Vibes Marina","version":"1.0","type":"link"}