{"product_id":"merc-137","title":"Mercury - Gearcase Shim Set - 15-32563A1","description":"\u003cp\u003eThe Mercury Quicksilver Gearcase Shim Set 15-32563A1 is an OEM shim kit used to set correct drive shaft bearing position and gearcase preload in compatible MerCruiser drive shaft housing assemblies. These precision shims allow fine adjustment during upper gearcase service, helping establish proper bearing setup, pinion depth, and gear contact pattern.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury\/Quicksilver gearcase shim set\u003c\/li\u003e\n\u003cli\u003ePart number: 15-32563A1\u003c\/li\u003e\n\u003cli\u003eAlso referenced as 32563A1\u003c\/li\u003e\n\u003cli\u003eDrive shaft housing top cover bearing shim kit\u003c\/li\u003e\n\u003cli\u003eOD: 1.750\"\u003c\/li\u003e\n\u003cli\u003eID: 1.500\"\u003c\/li\u003e\n\u003cli\u003eDesigned for 1.7813\" bore applications\u003c\/li\u003e\n\u003cli\u003eGTIN \/ UPC: 0745061077386\u003c\/li\u003e\n\u003cli\u003eUsed for bearing preload, gear depth, and contact-pattern adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eDrive Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCommonly used on select MerCruiser Alpha One Generation II drive assemblies in the upper drive shaft housing \/ top cover bearing area.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eVerify fitment by drive serial number, upper gear housing diagram, bearing configuration, and shim location before ordering. Shim sets are application-specific and should not be substituted by diameter alone.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eUse this shim set during upper gearcase rebuilds, bearing replacement, drive shaft housing service, or any repair requiring gear tooth contact pattern and bearing preload adjustment.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCorrect shim selection requires proper Mercury service procedures, measurement tools, and contact-pattern verification. Inspect the tapered roller bearing, bearing race, top cover, gearset, and housing bore before final assembly. Improper shim setup can cause gear noise, heat, accelerated wear, or premature gearcase failure.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003ePrimary Mercury references: 15-32563A1 and 32563A1. Common aftermarket interchanges include Sierra Marine 18-2282 and Sterndrive Engineering \/ SEI 98-106-02K.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eShim kits are not “close enough” parts. Their job is to position the bearing and gearset precisely, so the correct kit and careful setup are what prevent noisy gears and repeat lower-unit teardown.\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":"MERC","offers":[{"title":"Default Title","offer_id":43563852169252,"sku":"32563A1","price":20.01,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/4b27e593-9be6-45b0-8521-9296a717b9ed.png?v=1779398884","url":"https:\/\/marisolmarine.com\/products\/merc-137","provider":"Marisol Marine Company","version":"1.0","type":"link"}