{"product_id":"flywheel-ring-gear-168-tooth-for-14-inch-gm-marine-flywheel-sierra-18-4516","title":"Sierra Ring Gear-Flywheel 18-4516, 14 Inch GM Flywheel, 168 Teeth","description":"\u003cp\u003eThe Sierra Ring Gear-Flywheel 18-4516 is a replacement ring gear sized for a 14 inch GM flywheel with 168 teeth. It is used in marine engine applications where the flywheel ring gear has worn, cracked, or lost teeth from repeated starter engagement, a common failure point that can cause starter grinding or intermittent no-crank conditions. Installing a correctly sized and correctly toothed ring gear is important because a mismatch in diameter or tooth count will cause the starter pinion to bind, skip, or fail to engage the flywheel at all.\u003c\/p\u003e\u003cp\u003eThis ring gear is manufactured to fit the 14 inch GM flywheel platform specifically, with 168 teeth, so it is intended for engines using that flywheel size and tooth count rather than the 12 inch, 153-tooth GM flywheel platform, which uses a different ring gear. Confirm your existing flywheel's diameter and tooth count before ordering, since installing the wrong ring gear on the wrong flywheel size will result in improper starter engagement.\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 18-4516\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Ring Gear-Flywheel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlywheel Diameter:\u003c\/strong\u003e 14 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTooth Count:\u003c\/strong\u003e 168 teeth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 14 inch GM flywheel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282294892\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e14 inch GM flywheel with 168 teeth\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat size flywheel does the Sierra 18-4516 ring gear fit?\u003c\/strong\u003e The Sierra 18-4516 is sized for a 14 inch GM flywheel with 168 teeth. It is not intended for the smaller 12 inch, 153-tooth GM flywheel, which uses a different ring gear part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many teeth does this ring gear have?\u003c\/strong\u003e 168 teeth. Matching the tooth count to your flywheel is essential for proper starter pinion engagement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-4516 ring gear weigh?\u003c\/strong\u003e It weighs 2.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this the same as the 12 inch GM ring gear?\u003c\/strong\u003e No. The 18-4516 fits a 14 inch GM flywheel with 168 teeth, while the 12 inch, 153-tooth GM flywheel uses a separate Sierra part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-4516?\u003c\/strong\u003e You receive one Sierra Ring Gear-Flywheel, part number 18-4516, sized for a 14 inch GM flywheel with 168 teeth.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace a flywheel ring gear?\u003c\/strong\u003e A worn, cracked, or chipped ring gear can cause the starter to grind, slip, or fail to turn the engine over. Replacing the ring gear with the correctly toothed 18-4516 restores proper starter engagement on a 14 inch GM flywheel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-4516 come with the flywheel itself?\u003c\/strong\u003e No, the 18-4516 is the ring gear only, sized for a 14 inch GM flywheel with 168 teeth; it is not sold with a complete flywheel assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this ring gear on a non-GM flywheel?\u003c\/strong\u003e The 18-4516 is designed for a 14 inch GM flywheel with 168 teeth, so fitment outside that specification is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC listed for this part number available?\u003c\/strong\u003e Yes, the Sierra 18-4516 Ring Gear-Flywheel carries UPC 808282294892.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between 18-4516 and 18-4517?\u003c\/strong\u003e The 18-4516 fits a 14 inch GM flywheel with 168 teeth, while 18-4517 is a separate part sized for a 12 inch GM flywheel with 153 teeth. Confirm your flywheel's diameter and tooth count before choosing between the two.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988198666459,"sku":"SIE-18-4516","price":57.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4516__76933.1558185115.500.750.jpg?v=1785189111","url":"https:\/\/www.goodvibesmarina.com\/products\/flywheel-ring-gear-168-tooth-for-14-inch-gm-marine-flywheel-sierra-18-4516","provider":"Good Vibes Marina","version":"1.0","type":"link"}