{"product_id":"propeller-shaft-oil-seal-fits-mercury-outboard-30-150-hp-replaces-26-70081-26-8m0205729","title":"Propeller Shaft Oil Seal – Fits Mercury Outboard 30–150 HP (Replaces 26-70081, 26-8M0205729)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality \u003cstrong\u003ePropeller Shaft Oil Seal\u003c\/strong\u003e is engineered for the lower unit gear housing of various Mercury, Mariner, Force, and Honda outboard engines. It provides a robust replacement for models ranging from 30 HP to 150 HP, including numerous 2-stroke and 4-stroke applications across several decades of production, as well as Honda BF75 and BF90 series engines from 1997–1998.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct replacement for multiple OEM and aftermarket parts, including Mercury 26-70081 and 26-8M0205729, Honda 91255-ZW1-003, Sierra 18-2053, and GLM 85530.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls in the lower unit gear housing to seal the propeller shaft.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable, saltwater-resistant nitrile rubber.\u003c\/li\u003e\n\u003cli\u003eFeatures a dual-lip design for primary sealing and dust protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003e26-8M0205729\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda Marine\u003c\/td\u003e\n        \u003ctd\u003e91255-ZW1-003\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eForce\/US Marine\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-2053\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGLM\u003c\/td\u003e\n        \u003ctd\u003e85530\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-76115\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFits a wide range of Mercury and Mariner outboards (2-stroke and 4-stroke) from 30 HP to 225 HP, including DFI, EFI, and Bigfoot models.\u003c\/p\u003e\n\u003cp\u003eCompatible with select Force 2-stroke outboards from 1995–1999.\u003c\/p\u003e\n\u003cp\u003eDesigned for specific Honda 4-stroke models from 1997–1998.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV-225\u003c\/td\u003e\n        \u003ctd\u003e225\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eGear Housing (Prop Shaft)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV-200\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1978–1988\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eWithout Driveshaft Nut\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV-150\/V-1500\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1978–1985\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eV-6 Series incl. XR-2, Marathon, Magnum, Work models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003ePro XS\u003c\/td\u003e\n        \u003ctd\u003e115\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003e3-Cylinder 1.5L\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke EFI\u003c\/td\u003e\n        \u003ctd\u003e115\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003e2.07:1 \u0026amp; 2.33:1 Gear Ratios\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke EFI\u003c\/td\u003e\n        \u003ctd\u003e75-100\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eMultiple gear ratios\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003eDFI\u003c\/td\u003e\n        \u003ctd\u003e75-125\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003e3-Cylinder 1.5L\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e3-Cylinder\u003c\/td\u003e\n        \u003ctd\u003e70-90\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eIncluding Jet models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e4-Cylinder\u003c\/td\u003e\n        \u003ctd\u003e75-125\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eIncluding 80 Jet models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eBigfoot\u003c\/td\u003e\n        \u003ctd\u003e40-60\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003e3-Cylinder and 4-Cylinder models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003eStandard\u003c\/td\u003e\n        \u003ctd\u003e50-60\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eIncludes Jet 40-45 variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eMerc\u003c\/td\u003e\n        \u003ctd\u003e80-115\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eGear Housing (Propeller Shaft)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eForce\u003c\/td\u003e\n        \u003ctd\u003eStandard\u003c\/td\u003e\n        \u003ctd\u003e90\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1995–1999\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eMultiple clutch types\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eForce\u003c\/td\u003e\n        \u003ctd\u003eStandard\u003c\/td\u003e\n        \u003ctd\u003e120\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1995–1999\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003eMultiple clutch types\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eForce\u003c\/td\u003e\n        \u003ctd\u003eStandard\u003c\/td\u003e\n        \u003ctd\u003e75\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1999\u003c\/td\u003e\n        \u003ctd\u003e26-70081\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003eBF75AT\u003c\/td\u003e\n        \u003ctd\u003e75\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1997–1998\u003c\/td\u003e\n        \u003ctd\u003e91255-ZW1-003\u003c\/td\u003e\n        \u003ctd\u003eLHTA, LRTA \u0026amp; XRTA variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003eBF90AT\u003c\/td\u003e\n        \u003ctd\u003e90\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1997–1998\u003c\/td\u003e\n        \u003ctd\u003e91255-ZW1-003\u003c\/td\u003e\n        \u003ctd\u003eLHTA, LRTA \u0026amp; XRTA variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003ePropeller Shaft Oil Seal\u003c\/dd\u003e\n  \u003cdt\u003eInstallation Location\u003c\/dt\u003e\n\u003cdd\u003eLower Unit \/ Gear Housing\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eNitrile Rubber\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eOD: 45mm (1.76\"), ID: 30mm (1.185\"), Width: 9.1mm (0.35\")\u003c\/dd\u003e\n  \u003cdt\u003eTemperature Range\u003c\/dt\u003e\n\u003cdd\u003e-30°C to 120°C (-22°F to 248°F)\u003c\/dd\u003e\n  \u003cdt\u003eConstruction\u003c\/dt\u003e\n\u003cdd\u003eDual-lip design with primary sealing and dust protection\u003c\/dd\u003e\n  \u003cdt\u003eFeatures\u003c\/dt\u003e\n\u003cdd\u003eSaltwater, oil, and temperature resistant\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 or 2 x\u003c\/span\u003e Propeller Shaft Oil Seal (Replaces 26-70081\/26-8M0205729)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Package quantity varies by seller. Some listings include a single seal, while others include a two-pack. Please verify the quantity before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003ePosition the outboard securely on an engine stand or with the lower unit tilted up. Place a drain pan under the gearcase.\u003c\/li\u003e\n\u003cli\u003eRemove the lower gearcase drain and vent screws and allow all gear lube to drain completely.\u003c\/li\u003e\n\u003cli\u003eRemove the propeller nut and slide the propeller, thrust washer, and spacers off the shaft.\u003c\/li\u003e\n\u003cli\u003eUnbolt and carefully remove the bearing carrier assembly from the gearcase. The propeller shaft will come out with it.\u003c\/li\u003e\n\u003cli\u003eUsing a seal puller or flat-head screwdriver, carefully pry the old oil seals out of the bearing carrier. Avoid scratching the metal housing.\u003c\/li\u003e\n\u003cli\u003eThoroughly clean the seal housing area inside the bearing carrier to remove any old sealant or corrosion.\u003c\/li\u003e\n\u003cli\u003eLightly coat the outer edge of the new seals and the inner surface of the housing with marine grease.\u003c\/li\u003e\n\u003cli\u003eUsing a seal driver or a socket with a matching outside diameter, press the new seals squarely into the carrier until fully seated. Ensure the sealing lips face the correct direction (typically, sealing lips face the oil you are containing).\u003c\/li\u003e\n\u003cli\u003eLubricate the sealing lips and reinstall the propeller shaft and bearing carrier assembly.\u003c\/li\u003e\n\u003cli\u003eReinstall the propeller, hardware, and gearcase screws. Refill the lower unit with fresh, high-quality marine gear lube according to your engine's manual.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm this seal will fit my specific engine?\u003c\/summary\u003e\n  \u003cp\u003eFirst, check for your engine's model, HP, and year in the compatibility table. Second, it is critical to compare the listed dimensions (OD: 45mm, ID: 30mm, Width: 9.1mm) against your old part before ordering. If the numbers or appearance differ, do not purchase.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing propeller shaft seal?\u003c\/summary\u003e\n  \u003cp\u003eThe most common indicators are a visible gear lube leak from the propeller area or finding milky, grey, or chunky gear lube when you drain the lower unit. This \"milky\" appearance signifies water has mixed with the oil, which can cause catastrophic gear failure if not addressed.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should this seal be replaced?\u003c\/summary\u003e\n  \u003cp\u003eIt is recommended to inspect seals during any regular lower unit service (like a water pump impeller change). Proactively replace them every 3-5 years or 300 operating hours to prevent water intrusion. Always replace the seal if you see any signs of leaking.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhy do some sellers offer one seal and others offer two?\u003c\/summary\u003e\n  \u003cp\u003eMany gearcase designs use two of these seals installed back-to-back in the bearing carrier—one to keep gear oil in, and one to keep water out. Some sellers provide two seals for a complete replacement, while others sell them individually. Check the listing details to confirm the quantity provided.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003ePro-Grade Standards\u003c\/b\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eFast Global Fulfillment\u003c\/b\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eManufacturer-Direct Value\u003c\/b\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717911843131,"sku":"2858KF","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/2858KF.png?v=1762938275","url":"https:\/\/seasierra.com\/products\/propeller-shaft-oil-seal-fits-mercury-outboard-30-150-hp-replaces-26-70081-26-8m0205729","provider":"SeaSierra","version":"1.0","type":"link"}