{"product_id":"merc-255","title":"Mercury MerCruiser Oil Adaptor Seal - 26-42077","description":"\u003cp\u003eThe Mercury MerCruiser Quicksilver \u003cstrong\u003e26-42077\u003c\/strong\u003e is a genuine Mercury Marine OEM \u003cstrong\u003eseal\u003c\/strong\u003e used in select MerCruiser oil-system and engine adapter assemblies where the factory parts diagram calls for \u003cstrong\u003e42077 \/ 26-42077\u003c\/strong\u003e. This small molded seal is commonly associated with oil filter adaptor, oil cooler line, and bypass-related sealing locations on GM-based MerCruiser marine engines. It helps seal the adaptor interface and prevent engine oil leakage at the mounting surface.\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 seal.\u003c\/li\u003e\n\u003cli\u003eMercury\/MerCruiser part number: \u003cstrong\u003e26-42077\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: \u003cstrong\u003e42077\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eOfficial part label: \u003cstrong\u003eSEAL\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eGTIN\/UPC: \u003cstrong\u003e745061146426\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eListed shipping weight: \u003cstrong\u003e0.02 lb\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eListed shipping dimensions: \u003cstrong\u003e1.25 in. L x 1.25 in. W x 0.25 in. H\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsed where the Mercury\/MerCruiser parts diagram calls for this seal in oil-system or adaptor-related assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis seal is used across a wide range of Mercury\/MerCruiser applications by serial number and diagram location. Common application groups include select:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e7.4L MIE Gen V GM 454 V-8\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7.4L MIE Gen VI GM 454 V-8\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7.4L MIE MPI Gen V \/ Gen VI GM 454 V-8\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e454 Mag \/ 454 Mag MPI Bravo Gen V and Gen VI\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e454 Mag MPI Horizon Gen VI\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.2L MIE Gen V GM 502 V-8\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.2L MIE MPI Gen VI GM 502 V-8\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003e496 Mag\u003c\/strong\u003e applications where the diagram calls for this seal\u003c\/li\u003e\n\u003cli\u003eAdditional MerCruiser engine groups where the parts diagram specifies \u003cstrong\u003e26-42077 \/ 42077\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this part only where the factory Mercury\/MerCruiser diagram calls for \u003cstrong\u003e26-42077\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment by engine serial number, engine family, and exact oil-system diagram before ordering. Similar MerCruiser oil adaptor, cooler, and bypass assemblies can use different seals depending on Gen V\/Gen VI configuration, block style, remote oil filter setup, and serial range.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace this seal if oil is seeping at the oil filter adaptor, remote filter adaptor, cooler-line adaptor, or related block-mounted oil-system housing. It should also be replaced any time the adaptor housing is removed, resealed, or serviced. A flattened, hardened, cut, swollen, or oil-soaked seal can allow oil leakage and should not be reused.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eClean the sealing groove and mating surfaces before installation. Do not substitute a generic plumbing O-ring or hardware-store seal, as the correct profile and fit are important for oil-system sealing. Inspect the adaptor housing, fasteners, cooler lines, and related gaskets while the assembly is apart. Follow the MerCruiser service manual for the correct installation sequence and torque procedure for the specific engine.\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\u003e26-42077\u003c\/strong\u003e — Mercury\/MerCruiser formatted part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42077\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\u003eThis seal is inexpensive compared with the labour involved in accessing the oil adaptor area, so it is best replaced whenever the adaptor assembly is removed. Matching the seal by Mercury part number and diagram location is important because similar-looking oil seals may not compress or seat correctly in the adaptor groove.\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":43563857969188,"sku":"42077","price":18.74,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/3b995395-4b2a-47a8-af24-345dd24ccad3.png?v=1780981300","url":"https:\/\/marisolmarine.com\/products\/merc-255","provider":"Marisol Marine Company","version":"1.0","type":"link"}