{"product_id":"sierra-18-2748-exhaust-boot-4-id-replaces-mercruiser-32-44348t-fits-mercruiser-120-140-gm-v-6-v-8","title":"Sierra Exhaust Boot 18-2748, 4 Inch Upper Tube, Fits Mercruiser 120\/140 Stern Drive \u0026 GM V-6\/V-8 Engines","description":"\u003cp\u003eThe Sierra 18-2748 Exhaust Boot is a marine exhaust connector designed to link the exhaust riser to the exhaust hose on inboard\/outboard stern drive engines. It features a 4 inch upper tube (1016 millimeters) and is engineered for Mercruiser MCM 120 and 140 stern drives as well as GM V-6 and V-8 marine engines. This boot is intended for use with Sierra's 18-1975-1 Manifold Riser with Exhaust Tube, sealing the connection between the riser and the exhaust hose to prevent leaks of hot exhaust gas and water. Constructed with a bolt-on, round installation design, the boot ships one per package. Sierra manufactures this exhaust boot to meet or exceed the specifications of the original equipment part it replaces, making it a direct aftermarket replacement for Mercury Marine 32-44348T as well as GLM 89120, Mallory 9-72805, and Mercruiser Stern Drive 32-44348, 32-44348001, and 32-44348T. As with all Sierra marine parts, it is backed by Sierra's industry-leading customer satisfaction warranty. Boat owners and marine technicians running compatible Mercruiser stern drive or GM V-6\/V-8 setups can use this boot to restore a proper seal at the exhaust riser during routine maintenance or when replacing a cracked, hardened, or leaking original boot.\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 18-2748\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Exhaust Boot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper Tube Diameter:\u003c\/strong\u003e 4 inches (1016 millimeters)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1 exhaust boot per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.77 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999752963\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent Part Number:\u003c\/strong\u003e Mercury Marine 32-44348T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e GLM 89120, Mallory 9-72805, Mercruiser Stern Drive 32-44348, 32-44348001, 32-44348T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse With:\u003c\/strong\u003e Sierra 18-1975-1 Manifold Riser with Exhaust Tube\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser MCM 120 stern drive\u003c\/li\u003e\n\u003cli\u003eMercruiser MCM 140 stern drive\u003c\/li\u003e\n\u003cli\u003eGM V-6 and V-8 marine engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 89120\u003c\/li\u003e\n\u003cli\u003eMallory 9-72805\u003c\/li\u003e\n\u003cli\u003eMercruiser Stern Drive 32-44348\u003c\/li\u003e\n\u003cli\u003eMercruiser Stern Drive 32-44348001\u003c\/li\u003e\n\u003cli\u003eMercruiser Stern Drive 32-44348T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2748 exhaust boot fit?\u003c\/strong\u003e This exhaust boot is designed for Mercruiser MCM 120 and 140 stern drives as well as GM V-6 and V-8 marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the upper tube on this exhaust boot?\u003c\/strong\u003e The upper tube on the 18-2748 measures 4 inches (1016 millimeters) in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2748 a genuine Sierra part or aftermarket?\u003c\/strong\u003e It is a genuine Sierra part manufactured to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2748 boot replace Mercury Marine 32-44348T?\u003c\/strong\u003e Yes, the 18-2748 is an equivalent replacement for Mercury Marine part number 32-44348T.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other OEM part numbers does this boot cross-reference to?\u003c\/strong\u003e The 18-2748 crosses to GLM 89120, Mallory 9-72805, and Mercruiser Stern Drive numbers 32-44348, 32-44348001, and 32-44348T.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this exhaust boot weigh?\u003c\/strong\u003e The Sierra 18-2748 exhaust boot weighs 0.77 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other part does the 18-2748 boot install with?\u003c\/strong\u003e It is intended for use with Sierra's 18-1975-1 Manifold Riser with Exhaust Tube.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many exhaust boots come in the package?\u003c\/strong\u003e One exhaust boot is included per package for part number 18-2748.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the installation type for the 18-2748 boot?\u003c\/strong\u003e The 18-2748 uses a bolt-on, round installation design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2748 covered under warranty?\u003c\/strong\u003e Yes, this exhaust boot is covered under Sierra's customer satisfaction warranty like all Sierra marine parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace an exhaust boot like the 18-2748?\u003c\/strong\u003e Exhaust boots harden and crack with age and heat exposure, so a boot like the 18-2748 is typically replaced when the original seal at the exhaust riser starts leaking exhaust gas or water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the manufacturer part number for this exhaust boot?\u003c\/strong\u003e The manufacturer part number is 18-2748.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988111339739,"sku":"SIE-18-2748","price":36.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__70358.1753840675.500.750.jpg?v=1785188179","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2748-exhaust-boot-4-id-replaces-mercruiser-32-44348t-fits-mercruiser-120-140-gm-v-6-v-8","provider":"Good Vibes Marina","version":"1.0","type":"link"}