{"product_id":"starter-solenoid-for-mercury-9-9-90-hp-4-stroke-outboards-replaces-89-825096t-sierra-18-5821","title":"Sierra 18-5821 Starter Solenoid, Replaces Yamaha 6G1-81941-10-00, Fits Yamaha Outboards 9.9-F100 HP","description":"\u003cp\u003eThe Sierra 18-5821 is a 12-volt starter solenoid built as a direct replacement for the Yamaha outboard electrical system, cross-referencing OEM number 6G1-81941-10-00. It handles the high-current switching load between the ignition key circuit and the starter motor, delivering the power surge needed to crank the engine on demand. The solenoid is rated at 10 amps with a 1.4 kilowatt switching capacity, giving it the current-handling headroom required for reliable starts across a wide range of Yamaha outboard horsepower classes.\u003c\/p\u003e\u003cp\u003eHoused in a compact white enclosure measuring 3.56 x 2.19 x 2.5 inches, the 18-5821 is sized to mount in the factory location without modification. It covers Yamaha outboards spanning small tiller engines like the 9.9\/15 hp up through larger four-stroke F-series models including the F90 and F100. Because it is built to the same electrical specification as the original equipment part, it engages and disengages the starter circuit with the same responsiveness as the OEM solenoid it replaces. Sierra backs the part with a limited warranty.\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 18-5821\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Starter Solenoid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12 Volts (DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 10 Amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWattage:\u003c\/strong\u003e 1.4 KW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 3.56 x 2.19 x 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.29 pounds\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 6G1-81941-10-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha Outboard 9.9\/15 hp (1988-1997)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard 20 hp (1996-1997)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard 25 hp (1985, 1988-1999)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard 30 hp (1985-1987, 1989-1993, 1996-1999, 2001)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard 40 hp (1989-1990, 1992-2001)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard 50 hp (1989-1997, 1999-2002)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard 90 hp (1992-2002)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F15 (1998-2003)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F40 (1999)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F50 (1996-2002)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F60 (2002-2003)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F75 (2003-2004)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F80 (1999-2003)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F90 (2003-2004)\u003c\/li\u003e\n\u003cli\u003eYamaha Outboard F100 (1999-2002)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e6G1-81941-10-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5821 starter solenoid replace?\u003c\/strong\u003e It replaces Yamaha outboard OEM part number 6G1-81941-10-00, using the same 12-volt, 10-amp electrical specification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-5821 solenoid 12 volt?\u003c\/strong\u003e Yes, the Sierra 18-5821 operates on a 12-volt DC electrical system with a 10-amp rating and 1.4 kilowatt switching capacity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Yamaha outboards fit the 18-5821 starter solenoid?\u003c\/strong\u003e Coverage spans Yamaha outboards from 9.9\/15 hp and 20 hp through larger models including 30, 40, 50, and 90 hp, plus F-series four-strokes F15, F40, F50, F60, F75, F80, F90, and F100, with specific model years varying by horsepower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this solenoid fit a Yamaha F100?\u003c\/strong\u003e Yes, the 18-5821 is listed for the Yamaha F100 outboard for the 1999-2002 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5821 fit the Yamaha F90?\u003c\/strong\u003e Yes, it fits the Yamaha F90 outboard for the 2003-2004 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-5821?\u003c\/strong\u003e The solenoid measures 3.56 x 2.19 x 2.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5821 starter solenoid weigh?\u003c\/strong\u003e It weighs 0.29 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-5821 solenoid?\u003c\/strong\u003e The housing is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5821 an OEM or aftermarket part?\u003c\/strong\u003e The 18-5821 is a Sierra aftermarket solenoid built to match the electrical specification of Yamaha OEM part 6G1-81941-10-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many solenoids come in the package?\u003c\/strong\u003e The 18-5821 ships as a single starter solenoid unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the amperage rating of this starter solenoid?\u003c\/strong\u003e The Sierra 18-5821 is rated at 10 amps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5821 covered by a warranty?\u003c\/strong\u003e Yes, it is backed by Sierra's limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988325118171,"sku":"SIE-18-5821","price":60.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5821_lg__67377.1722357754.500.750.jpg?v=1785188680","url":"https:\/\/www.goodvibesmarina.com\/products\/starter-solenoid-for-mercury-9-9-90-hp-4-stroke-outboards-replaces-89-825096t-sierra-18-5821","provider":"Good Vibes Marina","version":"1.0","type":"link"}