{"product_id":"sierra-18-5840-marine-starter-solenoid-85a-12v-grounded-replaces-prestolite-saw4201-saw4207-saw4210","title":"Sierra 18-5840 Marine Starter Solenoid, Replaces Prestolite SAW4201, SAW4207, SAW4210, 15-79","description":"\u003cp\u003eThe Sierra 18-5840 is a 12-volt marine starter solenoid built with a steel housing and copper contacts for reliable current transfer in the engine bay. It is configured as a grounded 12-volt unit with an 85 amp continuous rating at 12 VDC, making it suitable for use as a lever-switch style solenoid in starter circuits that call for this rating and configuration. The steel housing resists the vibration and heat exposure typical of an engine compartment, while the copper contact construction is chosen for consistent conductivity over repeated engagement cycles.\u003c\/p\u003e\u003cp\u003eThis solenoid is a direct replacement for the listed Prestolite cross-reference numbers, so it can be used to service or replace an original starter solenoid on applications that originally used one of those Prestolite parts. It ships as a compact unit measuring 3 x 6 x 7.5 inches and weighing 0.79 pounds, sized to fit into the same mounting space as the OEM solenoid 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 18-5840\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Lever switch \/ starter solenoid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContacts:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12 Volts, grounded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Rating:\u003c\/strong\u003e 85 amp @ 12 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.79 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3 x 6 x 7.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Prestolite SAW4201, SAW4207, SAW4210, 15-79\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFits applications originally equipped with a Prestolite SAW4201, SAW4207, SAW4210, or 15-79 starter solenoid.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePrestolite SAW4201\u003c\/li\u003e\n\u003cli\u003ePrestolite SAW4207\u003c\/li\u003e\n\u003cli\u003ePrestolite SAW4210\u003c\/li\u003e\n\u003cli\u003ePrestolite 15-79\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat voltage and amperage is the Sierra 18-5840 rated for?\u003c\/strong\u003e The Sierra 18-5840 is a 12-volt, grounded starter solenoid with an 85 amp continuous rating at 12 VDC.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5840 a direct replacement for a Prestolite solenoid?\u003c\/strong\u003e Yes, the 18-5840 replaces the Prestolite SAW4201, SAW4207, SAW4210, and 15-79 starter solenoids.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this solenoid?\u003c\/strong\u003e The Sierra 18-5840 measures 3 x 6 x 7.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5840 weigh?\u003c\/strong\u003e It weighs 0.79 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the housing made of?\u003c\/strong\u003e The 18-5840 uses a steel housing with copper contacts, which stands up to the heat and vibration of an engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this solenoid grounded or insulated?\u003c\/strong\u003e The Sierra 18-5840 is a grounded 12-volt solenoid, not an insulated design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of switch is the 18-5840?\u003c\/strong\u003e It is built as a lever switch style starter solenoid with copper contacts for consistent conductivity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5840 fit an application that used a Prestolite SAW4207?\u003c\/strong\u003e Yes, the Sierra 18-5840 directly cross-references to the Prestolite SAW4207, along with the SAW4201, SAW4210, and 15-79.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5840 include mounting hardware?\u003c\/strong\u003e The listing covers the Sierra 18-5840 solenoid unit itself; check your original hardware for reuse during installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5840 genuine or aftermarket?\u003c\/strong\u003e The 18-5840 is a genuine Sierra part manufactured to replace the specified Prestolite OEM solenoids.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988326494427,"sku":"SIE-18-5840","price":44.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-5840__64881.1737851632.500.750.jpg?v=1785188760","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-5840-marine-starter-solenoid-85a-12v-grounded-replaces-prestolite-saw4201-saw4207-saw4210","provider":"Good Vibes Marina","version":"1.0","type":"link"}