{"product_id":"gimbal-bearing-18-21006-replaces-mercruiser-30-879194a01-fits-bravo-i-ii-iii-x-xr-xz-and-alpha-gen-ii-non-greasable","title":"Sierra Gimbal Bearing 18-21006, Replaces 30-879194A01, Fits Bravo I\/II\/III\/X\/XR\/XZ (1996-2010) \u0026 Gen II (1998-2010)","description":"\u003cp\u003eThis Sierra gimbal bearing (18-21006) supports the engine coupler where it passes through the gimbal ring, allowing the drive unit to pivot for steering and trim while carrying the load of the engine coupler shaft. It is built with an alloy steel ball bearing design and finished in white. The bearing is a non-greasable design, so there is no grease fitting to service on a routine maintenance schedule. It functions as a direct replacement for OEM part 30-879194A01 and is sized to fit the same coupler bore used across the applicable Bravo and Gen II sterndrive lines.\u003c\/p\u003e\u003cp\u003eSierra 18-21006 fits Bravo I, II, III, X, XR, and XZ sterndrives built 1996-2010, and Gen II sterndrives built 1998-2010. Within the Bravo XZ line, it is confirmed for units with serial number F730000 and up. Because gimbal bearing wear directly affects coupler alignment and can accelerate U-joint and bellows wear if left unaddressed, replacing a worn or pitted bearing with a properly sized unit like this one helps keep the drive shaft running true.\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 18-21006\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Gimbal Bearing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Type:\u003c\/strong\u003e Ball Bearing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLubrication:\u003c\/strong\u003e Non Greasable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282294175\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00808282294175\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Met:\u003c\/strong\u003e ISO 9001\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBravo I, II, III, X, XR, and XZ sterndrives, 1996-2010\u003c\/li\u003e\n\u003cli\u003eBravo XZ sterndrives, serial number F730000 and up\u003c\/li\u003e\n\u003cli\u003eGen II sterndrives, 1998-2010\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e30-879194A01\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does gimbal bearing 18-21006 fit?\u003c\/strong\u003e Sierra 18-21006 fits Bravo I, II, III, X, XR, and XZ sterndrives built 1996-2010, and Gen II sterndrives built 1998-2010. On Bravo XZ units it is confirmed for serial number F730000 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-21006 the same as OEM part 30-879194A01?\u003c\/strong\u003e Yes, Sierra 18-21006 is a direct replacement for OEM part 30-879194A01 and is sized to the same coupler bore.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gimbal bearing need to be greased?\u003c\/strong\u003e No. The 18-21006 gimbal bearing is a non-greasable design, so there is no grease fitting to service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-21006 gimbal bearing made from?\u003c\/strong\u003e It is machined from alloy steel in a ball-bearing design, finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-21006 gimbal bearing weigh?\u003c\/strong\u003e The 18-21006 gimbal bearing weighs 1.17 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of gimbal bearing 18-21006?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-21006 fit a Bravo I sterndrive?\u003c\/strong\u003e Yes, Sierra 18-21006 is listed as fitting Bravo I sterndrives built 1996-2010, along with Bravo II, III, X, XR, and XZ of the same years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-21006 fit Gen II sterndrives?\u003c\/strong\u003e Yes, this gimbal bearing fits Gen II sterndrives built 1998-2010.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the 18-21006 gimbal bearing?\u003c\/strong\u003e The package includes one Sierra 18-21006 gimbal bearing, sold as a single unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-21006 gimbal bearing genuine Sierra or aftermarket?\u003c\/strong\u003e The 18-21006 is a genuine Sierra-branded part manufactured to ISO 9001 specification met standards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat serial number range is confirmed for Bravo XZ fitment on 18-21006?\u003c\/strong\u003e For Bravo XZ sterndrives, Sierra 18-21006 is confirmed for serial number F730000 and up.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988091810011,"sku":"SIE-18-21006","price":91.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-21006__76270.1650893893.500.750.jpg?v=1785188482","url":"https:\/\/www.goodvibesmarina.com\/products\/gimbal-bearing-18-21006-replaces-mercruiser-30-879194a01-fits-bravo-i-ii-iii-x-xr-xz-and-alpha-gen-ii-non-greasable","provider":"Good Vibes Marina","version":"1.0","type":"link"}