{"product_id":"cm-transom-bellow-kit-for-mercruiser-alpha-one-gen-1-1977-1990-complete-bellows-gimbal-bearing-hoses","title":"CM Transom Bellow Kit for MerCruiser Alpha One Gen 1 (1977–1990) — Complete Bellows, Gimbal Bearing \u0026 Hoses","description":"\u003cp\u003e\u003cstrong\u003eComplete transom bellows replacement kit engineered to refresh the gimbal housing, U-joint, exhaust and shift bellows, hoses, clamps and gimbal bearing on MerCruiser Alpha One Gen 1 sterndrives (fits 1977–1990 models).\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your sterndrive has been in service for years, dried or cracked bellows, leaking exhaust boots or a worn gimbal bearing can invite water into the boat’s inner transom and damage steering and drive components. The CM 803097T1 kit supplies every rubber part and the gimbal bearing needed to restore the transom seal and mechanical articulation for the MerCruiser Alpha One and related R\/MR models across the 1977–1990 production window.\u003c\/p\u003e\n\n\u003ch3\u003eWhich MerCruiser models and serial ranges does this kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis aftermarket kit replaces the OEM 30-803097T and fits Alpha One Gen 1 sterndrives plus many R and MR variants. It is intended for MerCruiser units produced between 1977 and 1990 and matches the documented serial ranges for late-model Alpha One units.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for MerCruiser Alpha One, R and MR sterndrives\u003c\/li\u003e\n  \u003cli\u003eCompatible with Alpha One SS (1986–1989) and Alpha One (1983–1990) serial ranges indicated by OEM notes\u003c\/li\u003e\n  \u003cli\u003eCross-references Sierra 18-2601-1 and GLM 21950 where applicable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included, and what OEM pieces do they replace?\u003c\/h3\u003e\n\u003cp\u003eThe CM kit is comprehensive: it supplies U-joint and exhaust bellows, shift bellows, both sizes of water hoses, stainless clamps, a gimbal bearing and a full gasket set. Each component replaces a specific MerCruiser OEM part so you can address all common transom-service wear points in one service session.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eU-joint bellows — replaces OE 60932A4\u003c\/li\u003e\n  \u003cli\u003eExhaust bellows — replaces OE 32734A3 and 18654A1\u003c\/li\u003e\n  \u003cli\u003eWater hoses — 5\/8\" and 3\/4\" hoses replace OE 32-32461 and 32-41725\u003c\/li\u003e\n  \u003cli\u003eShift bellows, gimbal bearing, gasket set and all stainless hose clamps included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and build quality should I expect?\u003c\/h3\u003e\n\u003cp\u003eCM uses marine-grade rubber for the bellows to resist salt and sun exposure and stainless steel for the clamps to reduce corrosion at hose connections. The gimbal bearing and gasket materials are specified to match the sealing and load characteristics required by the original design.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine-grade rubber bellows for UV and water resistance\u003c\/li\u003e\n  \u003cli\u003eStainless-steel hose clamps to minimize corrosion\u003c\/li\u003e\n  \u003cli\u003eGimbal bearing supplied to replace worn-or-damaged original unit\u003c\/li\u003e\n  \u003cli\u003eComplete gasket set for reliable sealing during reassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will installing this kit affect maintenance and drive performance?\u003c\/h3\u003e\n\u003cp\u003eReplacing degraded bellows and the gimbal bearing restores watertight protection of the transom area and improves steering and driveline reliability by eliminating play and leakage. Routine replacement of these parts during service helps prevent costly internal transom corrosion and drive failures later on.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReinstates a tight transom seal to block water intrusion\u003c\/li\u003e\n  \u003cli\u003eEliminates slack or wobble from a worn gimbal bearing\u003c\/li\u003e\n  \u003cli\u003eRefreshes exhaust and shift bellows for smoother operation\u003c\/li\u003e\n  \u003cli\u003eSimplifies future maintenance by replacing all wear items at once\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The CM 803097T1 Transom Bellows Kit is aimed at boat owners, marine technicians and restoration shops working on MerCruiser Alpha One Gen 1, R or MR sterndrives from the late 1970s through 1990. If you’re performing a transom service, addressing leaks at the gimbal housing, or preparing a classic sterndrive for reliable use, this kit supplies the correct replacement rubber components, hoses, bearing and hardware to complete the job in a single overhaul.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit replace the OEM 30-803097T?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The CM 803097T1 is an aftermarket replacement for OEM 30-803097T and compatible cross-references.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the clamps corrosion-resistant?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The included clamps are stainless steel to resist rust in marine environments.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"CM","offers":[{"title":"Default Title","offer_id":48081519116446,"sku":"B0869CXM6Z","price":121.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/cm-transom-bellows-kit-front-packaging.jpg?v=1785806999","url":"https:\/\/northtrailauto.ca\/products\/cm-transom-bellow-kit-for-mercruiser-alpha-one-gen-1-1977-1990-complete-bellows-gimbal-bearing-hoses","provider":"North Trail Auto","version":"1.0","type":"link"}