{"product_id":"west-1012","title":"Blackfish Cutlass Bearing 1x1-1\/4x4 JON-BACK","description":"\u003cp\u003eThis 1\" x 1-1\/4\" x 4\" Blackfish cutlass bearing corresponds to the \u003cstrong\u003eBACK\u003c\/strong\u003e size code used for Johnson Duramax naval brass sleeve bearings. Current references describe this bearing as a water-lubricated marine shaft bearing with a \u003cstrong\u003e1\" shaft size, 1-1\/4\" outside diameter, and 4\" overall length\u003c\/strong\u003e, built with a \u003cstrong\u003enaval brass outer shell\u003c\/strong\u003e and a \u003cstrong\u003ebonded nitrile rubber lining\u003c\/strong\u003e for dependable support in wet marine service.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSize code \u003cstrong\u003eBACK\u003c\/strong\u003e with \u003cstrong\u003e1\" ID x 1-1\/4\" OD x 4\" length\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eWater-lubricated \u003cstrong\u003enaval brass sleeve bearing\u003c\/strong\u003e design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil- and chemical-resistant nitrile rubber\u003c\/strong\u003e bonded to the shell.\u003c\/li\u003e\n\u003cli\u003eAdaptable for \u003cstrong\u003estrut and stern tube mounts\u003c\/strong\u003e and also commonly used as \u003cstrong\u003erudder-stock and pintle bushings\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCurrent listing data shows approximate \u003cstrong\u003emetal wall thickness of 3\/64\"\u003c\/strong\u003e and \u003cstrong\u003egross weight around 0.4 lb\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis is \u003cstrong\u003enot an engine-specific part\u003c\/strong\u003e. It is a \u003cstrong\u003eshaft bearing\u003c\/strong\u003e selected by shaft diameter, outside diameter, and bearing length for marine shaft-support applications such as \u003cstrong\u003estruts, stern tubes, rudder stock, and pintle bushing use\u003c\/strong\u003e. The correct match is based on bearing dimensions and housing style rather than engine make alone.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eMatch this bearing by \u003cstrong\u003eshaft size, outside diameter, overall length, and housing application\u003c\/strong\u003e before ordering. For a part like JON-BACK \/ BACK, dimensional matching matters more than appearance, especially when multiple cutless bearings can look similar while carrying different clearances or shell thicknesses.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace the cutless bearing when the shaft feels loose in the bearing, when wear has substantially reduced the water grooves, or when vibration, noise, or uneven shaft support points to bearing wear. Duramax replacement guidance referenced by current marine distributors notes that replacement is commonly warranted once significant groove wear is present.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSleeve bearings like this are typically installed with a \u003cstrong\u003elight press fit\u003c\/strong\u003e and then secured in place with \u003cstrong\u003econe-pointed set screws\u003c\/strong\u003e where the installation calls for them. Current installation guidance also notes that if shrink fitting is required, gradual cooling is preferred and impact loading on a chilled bearing should be avoided to protect the rubber-to-shell bond.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCurrent references support \u003cstrong\u003eBACK\u003c\/strong\u003e as the manufacturer size code for this bearing. Related catalog references also show \u003cstrong\u003e870252100\u003c\/strong\u003e as the corresponding Duramax \/ Johnson ordering number for this same 1\" x 1-1\/4\" x 4\" brass cutless bearing size.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe easy mistake with cutless bearings is ordering by the product name alone. For this one, the right match is \u003cstrong\u003e1\" shaft x 1-1\/4\" OD x 4\" length\u003c\/strong\u003e, because even a small dimensional mismatch can turn a simple bearing swap into an installation problem.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"WEST","offers":[{"title":"Default Title","offer_id":43564182863908,"sku":"JON-BACK","price":197.23,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/dbee4bb3-fe1a-4250-aeff-a673001ab86e.png?v=1776731287","url":"https:\/\/marisolmarine.com\/products\/west-1012","provider":"Marisol Marine Company","version":"1.0","type":"link"}