{"product_id":"exhaust-bellows-expander-tool-fits-mercruiser-alpha-one-alpha-gen-ii-bravo-blackhawk-drive-units-replaces-91-45497a1-91-8m0096108","title":"Exhaust Bellows Expander Tool – Fits MerCruiser Alpha One, Alpha Gen II, Bravo \u0026 Blackhawk Drive Units (Replaces 91-45497A1, 91-8M0096108)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis specialized **Exhaust Bellows Expander Tool** is designed for the proper installation of exhaust bellows on a wide range of MerCruiser stern drive units. It is compatible with MC-1\/R\/MR, Alpha One, Alpha One Gen II, Bravo (I, II, III), and Blackhawk drive units, ensuring a precise fit and seal.\u003c\/p\u003e\n\u003cp\u003eThis tool is a direct replacement for Mercury MerCruiser part numbers 91-45497A1 and 91-8M0096108.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for manual mechanical operation.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable steel for long service life.\u003c\/li\u003e\n\u003cli\u003eFeatures a scissor handle with a vinyl grip and secure screw lock mechanism.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eSuperseded By\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1\u003c\/td\u003e\n        \u003ctd\u003e91-8M0096108\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e91-8M0096108\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis tool is designed for use with the following Mercury MerCruiser stern drive units.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eDrive Type\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAlpha One Gen II\u003c\/td\u003e\n        \u003ctd\u003e1998 and up\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMC-1\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eR\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMR\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAlpha One\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBravo One\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBravo Two\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBravo Three\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBravo X (I, II, III)\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n        \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eBlackhawk\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e91-45497A1, 91-8M0096108\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eExhaust Bellows Expander Tool\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eManual mechanical operation\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eSteel\u003c\/dd\u003e\n  \u003cdt\u003eDesign\u003c\/dt\u003e\n\u003cdd\u003eScissor handle with vinyl grip \u0026amp; screw lock\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eOpens with screw lock mechanism\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Exhaust Bellows Expander Tool (91-45497A1\/91-8M0096108)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is off, cool, and the drive is tilted to a safe, accessible position.\u003c\/li\u003e\n  \u003cli\u003ePosition the new exhaust bellow onto the bell housing exhaust outlet.\u003c\/li\u003e\n  \u003cli\u003eInsert the expander tool fully into the open end of the bellow.\u003c\/li\u003e\n  \u003cli\u003eSlowly turn the screw handle to expand the tool, stretching the bellow just enough to slide over the exhaust tube lip on the gimbal housing.\u003c\/li\u003e\n  \u003cli\u003eOnce the bellow is correctly seated in its groove, secure it with the designated clamp and torque to manufacturer specifications.\u003c\/li\u003e\n  \u003cli\u003eCarefully loosen the screw handle on the tool to contract it, then remove it from the drive.\u003c\/li\u003e\n  \u003cli\u003eDouble-check that the bellow is secure, properly aligned, and tightly sealed.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is this tool used for?\u003c\/summary\u003e\u003cp\u003eThis tool is specifically designed to expand the exhaust bellows for easier installation on MerCruiser stern drives. It holds the bellow open, allowing it to be correctly seated without damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this tool work on a Bravo III drive?\u003c\/summary\u003e\u003cp\u003eYes, it is compatible with Bravo I, II, and III drives, as well as Alpha One (Gen I and II), MC-1, R, MR, and Blackhawk units.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does the screw lock mechanism work?\u003c\/summary\u003e\u003cp\u003eThe screw lock allows for gradual and controlled expansion of the tool's arms. This prevents over-stretching or damaging the new bellow and holds it securely in the expanded position during installation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs it difficult to use for a DIY installation?\u003c\/summary\u003e\u003cp\u003eWhile the tool simplifies the process, installing bellows can be challenging due to tight access. It requires care to ensure a proper seal. We recommend professional installation if you are not experienced with stern drive maintenance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003ePro-Grade Standards\u003c\/b\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eFast Global Fulfillment\u003c\/b\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eManufacturer-Direct Value\u003c\/b\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717889167675,"sku":"22ET001","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Exhaust_Bellows_Expander_Tool_for_Mercury_MerCruiser_Stern_Drive_Engines___91-45497A1_-_JLM_MARINE-8287026.jpg?v=1762937469","url":"https:\/\/seasierra.com\/products\/exhaust-bellows-expander-tool-fits-mercruiser-alpha-one-alpha-gen-ii-bravo-blackhawk-drive-units-replaces-91-45497a1-91-8m0096108","provider":"SeaSierra","version":"1.0","type":"link"}