{"product_id":"merc-165","title":"Mercury MerCruiser Speedmaster SSM Gearcase Shim Set - 15-34800A1","description":"\u003cp\u003eThe Mercury MerCruiser Quicksilver \u003cstrong\u003e15-34800A1\u003c\/strong\u003e is a genuine Mercury Marine OEM \u003cstrong\u003eprecision shim set\u003c\/strong\u003e used in select MerCruiser and Mercury Racing gearcase service applications. This shim set is used where the factory service procedure calls for \u003cstrong\u003e34800A1 \/ 15-34800A1\u003c\/strong\u003e, helping establish the correct gear depth, bearing preload, and internal gearcase alignment during lower-unit or drive rebuild work.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury Marine factory OEM shim set.\u003c\/li\u003e\n\u003cli\u003eMercury\/MerCruiser part number: \u003cstrong\u003e15-34800A1\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: \u003cstrong\u003e34800A1\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003ePrecision shim kit for select gearcase setup and internal drive alignment procedures.\u003c\/li\u003e\n\u003cli\u003eUsed to adjust gear position, bearing cup depth, or related internal tolerance stack where specified by Mercury service documentation.\u003c\/li\u003e\n\u003cli\u003eListed weight: \u003cstrong\u003e0.05 lb\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eListed package dimensions: \u003cstrong\u003e7.50 in. L x 5.00 in. W x 0.25 in. H\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eGTIN\/UPC: \u003cstrong\u003e745061137585\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eApplication Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCommon application context includes select Mercury and MerCruiser high-performance, racing, and legacy drive assemblies by serial number, gearcase type, and service procedure, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeedmaster \/ Super Speedmaster\u003c\/strong\u003e gearcase applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSSM II \/ SSM III \/ SSM IV \/ SSM V\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlpha One SS\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eMerCruiser III\u003c\/strong\u003e drive configurations where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eDry Sump Six, M8, SSM Six, SSM Seven, and NXT1\u003c\/strong\u003e racing or performance drive applications where the service procedure calls for this shim set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this shim set only where the Mercury\/MerCruiser or Mercury Racing gearcase service procedure specifically calls for \u003cstrong\u003e15-34800A1 \/ 34800A1\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment by drive model, drive serial number, gearcase type, gear ratio, bearing location, and exact Mercury service procedure before ordering. Gearcase shim sets are not selected by outside diameter or appearance alone. The correct shim stack depends on measured gear depth, bearing preload, gear contact pattern, and the specific internal parts being installed.\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 gearcase rebuilds, bearing cup replacement, gearset replacement, housing service, or internal drive setup when the original shim stack is missing, damaged, corroded, distorted, or no longer produces the correct preload and gear contact. Shims may also be required when replacing bearings, gears, shafts, housings, or other internal components that affect gear alignment.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eMeasure and record the original shim stack before disassembly when possible. Keep shim locations organized and do not mix shims from different bearing or gear positions. Final shim thickness must be selected using the correct Mercury service manual, measuring tools, and gearcase setup procedure. Do not guess shim thickness. Incorrect shimming can cause gear whine, overheating, bearing failure, poor tooth contact, accelerated wear, or catastrophic gearcase damage.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e15-34800A1\u003c\/strong\u003e — Mercury\/MerCruiser formatted part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e34800A1\u003c\/strong\u003e — Manufacturer part number\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eShim sets are precision setup parts, not general-purpose washers. On performance and racing gearcases, even small shim changes can affect gear tooth contact and bearing load. The correct setup should always be measured and verified with the proper service tools before the drive is returned to service.\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":43563854266404,"sku":"34800A1","price":22.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/c7559777-f2be-4110-94b3-e54222c38763.png?v=1781127459","url":"https:\/\/marisolmarine.com\/products\/merc-165","provider":"Marisol Marine Company","version":"1.0","type":"link"}