{"product_id":"sierra-18-9847-bellows-expander-tool-for-mercruiser-alpha-one-bravo-one-two-blackhawk-drives-replaces-mercury-91-45497a1","title":"Sierra 18-9847 Bellows Expander Tool - Replaces Mercury Marine 91-45497A1 for MC-I, R-MR, Alpha One, Bravo One\/Two, Blackhawk Drive Units","description":"\u003cp\u003eThe Sierra 18-9847 Bellows Expander Tool is a specialty installation tool built to install exhaust bellows on MC-I, R-MR, Alpha One, Bravo One and Two, and Blackhawk drive units. Exhaust bellows are a common wear item on sterndrive boats, and getting a new bellows seated correctly over the gimbal housing and transom assembly requires expanding it evenly without tearing or distorting the rubber. This tool is designed specifically for that job, giving technicians and DIY boat owners a repeatable way to stretch the bellows into place during a drive unit service or bellows replacement.\u003c\/p\u003e\u003cp\u003eConstructed from alloy steel for durability under repeated shop use, the 18-9847 measures 15.75 x 5.25 x 3.25 inches and weighs 0.75 pounds, making it easy to store with other drive unit service tools. It is manufactured to meet or exceed the fit and function of the original equipment tool it replaces, so it drops into the same service procedures used for these Mercury MerCruiser drive units. Whether you are replacing a torn exhaust bellows, a shift cable bellows, or servicing the gimbal ring during a routine drive unit teardown, this expander tool is sized for the bellows used on the drive units listed below.\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 18-9847\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Bellows Expander Tool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions (L x W x H):\u003c\/strong\u003e 15.75 x 5.25 x 3.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.75 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Specialty Tools\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282109554\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e Mercury Marine 91-45497A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eInstalls exhaust bellows on MC-I, R-MR, Alpha One, Bravo One and Two, and Blackhawk drive units.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 91-45497A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat drive units does the Sierra 18-9847 fit?\u003c\/strong\u003e The Sierra 18-9847 Bellows Expander Tool installs exhaust bellows on MC-I, R-MR, Alpha One, Bravo One and Two, and Blackhawk drive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does this tool replace?\u003c\/strong\u003e It replaces Mercury Marine part number 91-45497A1, so it is a direct swap for that original tool in the same bellows installation procedure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-9847 made of?\u003c\/strong\u003e The tool is made of alloy steel, giving it the rigidity needed to expand exhaust bellows without deforming under repeated use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Bellows Expander Tool?\u003c\/strong\u003e The Sierra 18-9847 measures 15.75 x 5.25 x 3.25 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-9847 weigh?\u003c\/strong\u003e It weighs 0.75 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-9847 is a Sierra-branded specialty tool manufactured to meet or exceed the original equipment tool it replaces, Mercury Marine 91-45497A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat job does a bellows expander tool actually do?\u003c\/strong\u003e It stretches a new exhaust bellows over the gimbal housing and transom assembly so it seats evenly during drive unit installation, which is exactly what the Sierra 18-9847 is designed for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-9847 on an Alpha One drive unit?\u003c\/strong\u003e Yes, the Sierra 18-9847 is listed for use on Alpha One drive units in addition to MC-I, R-MR, Bravo One and Two, and Blackhawk units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this tool?\u003c\/strong\u003e You receive one Sierra 18-9847 Bellows Expander Tool.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this tool work on Bravo Two drive units?\u003c\/strong\u003e Yes, installing exhaust bellows on Bravo Two drive units is one of the applications listed for the Sierra 18-9847.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-9847 covered under warranty?\u003c\/strong\u003e Sierra parts, including the 18-9847 Bellows Expander Tool, are covered under Sierra's standard product warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988437709019,"sku":"SIE-18-9847","price":59.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-9847_lg__35991.1558133161.500.750.jpg?v=1785187976","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-9847-bellows-expander-tool-for-mercruiser-alpha-one-bravo-one-two-blackhawk-drives-replaces-mercury-91-45497a1","provider":"Good Vibes Marina","version":"1.0","type":"link"}