{"product_id":"outboard-starter-for-mercury-6-15-hp-18-25-hp-replaces-50-90983t1-10-tooth-drive-sierra-18-5611","title":"Sierra 18-5611 Outboard Starter, Replaces 50-90983T1, Fits 6-15 HP (1986-96) \u0026 18-25 HP (1980-87), 10 Tooth Drive Gear","description":"\u003cp\u003eThe Sierra 18-5611 is an outboard starter built as a direct replacement for outboard engines in the 6-15 HP (1986-96) and 18-25 HP (1980-87) range, using a 10 tooth drive gear configuration. It is engineered to restore reliable cranking performance on outboards where the original starter has failed or is showing signs of wear, such as slow cranking, clicking without engagement, or complete no-start conditions tied to the starter motor itself.\u003c\/p\u003e\u003cp\u003eThis starter is rated at 20 amps and 1.4 kW, providing the electrical draw and output needed to turn over the engine consistently in the covered horsepower range. It is finished in white to match OEM outboard cowling and powerhead components. As a Sierra product, it is built to meet or exceed the performance of the original equipment part it replaces, giving boat owners and marine technicians a dependable option for engine maintenance and repair.\u003c\/p\u003e\u003cp\u003eThe 18-5611 is compatible with multiple OEM part numbers, so it can be used as a cross-reference replacement without needing to track down a specific original manufacturer part. It is sized to install using the same mounting configuration as the original starter on the covered engines, with the 10 tooth drive gear matching the flywheel engagement of these outboard applications.\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 18-5611\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Outboard Starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 20 Amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWattage:\u003c\/strong\u003e 1.4 kW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Gear:\u003c\/strong\u003e 10 tooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment (Horsepower):\u003c\/strong\u003e 6-15 HP (1986-96); 18-25 HP (1980-87)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 9 x 4.75 x 4.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.69 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 747730043982\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 50-90983A-1, 50-90983T1, 50-8M0033984\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6-15 HP outboards (1986-96), 10 tooth drive gear\u003c\/li\u003e\n\u003cli\u003e18-25 HP outboards (1980-87), 10 tooth drive gear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e50-90983A-1\u003c\/li\u003e\n\u003cli\u003e50-90983T1\u003c\/li\u003e\n\u003cli\u003e50-8M0033984\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-5611 starter fit?\u003c\/strong\u003e The 18-5611 fits outboards rated 6-15 HP from 1986-96 and 18-25 HP from 1980-87, using a 10 tooth drive gear.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-5611 replace?\u003c\/strong\u003e It replaces OEM numbers 50-90983A-1, 50-90983T1, and 50-8M0033984, so it can be ordered as a direct cross-reference without sourcing the original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many teeth are on the drive gear of this starter?\u003c\/strong\u003e The 18-5611 starter uses a 10 tooth drive gear, matching the flywheel engagement on its listed 6-15 HP and 18-25 HP outboard applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-5611 starter?\u003c\/strong\u003e It is finished in white, consistent with the cowling and powerhead color on the outboards it fits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the electrical ratings of the 18-5611 starter?\u003c\/strong\u003e This starter is rated at 20 amps and 1.4 kW of output, sized to reliably crank engines in the 6-15 HP and 18-25 HP range it is built for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5611 starter weigh?\u003c\/strong\u003e The Sierra 18-5611 outboard starter weighs 3.69 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the physical dimensions of the 18-5611?\u003c\/strong\u003e The unit measures 9 x 4.75 x 4.75 inches, sized for direct installation in place of the original starter on covered outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5611 a genuine OEM part or aftermarket replacement?\u003c\/strong\u003e It is a Sierra aftermarket replacement starter, built to meet or exceed the performance of the original equipment starter it replaces on 6-15 HP (1986-96) and 18-25 HP (1980-87) outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5611 fit an outboard outside the 6-15 HP or 18-25 HP range?\u003c\/strong\u003e No, the 18-5611 is built specifically for 6-15 HP (1986-96) and 18-25 HP (1980-87) outboards with a 10 tooth drive gear; other horsepower ranges require a different starter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-5611?\u003c\/strong\u003e Ordering the Sierra 18-5611 gets you one complete outboard starter unit ready to install in place of the original.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5611 include a UPC for retail or inventory tracking?\u003c\/strong\u003e Yes, the Sierra 18-5611 starter is identified by UPC 747730043982.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988221669595,"sku":"SIE-18-5611","price":159.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-5611__29863.1722496185.500.750.jpg?v=1785187990","url":"https:\/\/www.goodvibesmarina.com\/products\/outboard-starter-for-mercury-6-15-hp-18-25-hp-replaces-50-90983t1-10-tooth-drive-sierra-18-5611","provider":"Good Vibes Marina","version":"1.0","type":"link"}