Description
Mercury 8M0205729 Outer Prop Shaft Oil Seal Replaces 26-70081
Replace a worn or leaking lower unit oil seal with the Mercury 8M0205729 outer oil seal. This Mercury seal replaces 26-70081 and is commonly used in select propeller shaft, bearing carrier, gearcase, and lower unit sealing applications where this part number is specified.
Key Features
- Genuine Mercury oil seal for select marine lower unit and gearcase applications
- Outer oil seal commonly used at the propeller shaft / bearing carrier area
- Helps seal gear lubricant inside the gearcase and reduce the risk of water intrusion
- Replacement for Mercury/MerCruiser 26-70081 oil seal
- Important service part for lower unit reseal, propeller shaft seal replacement, and gearcase repair
- Best matched by part number, model, serial number, and parts diagram before ordering
Fitment / Product Details
- Brand: Mercury
- Part Number: 8M0205729
- BU Part ID: Not provided
- Product Type: Outer Oil Seal / Propeller Shaft Oil Seal
- Application: Select Mercury/MerCruiser propeller shaft, bearing carrier, gearcase, and lower unit oil seal applications
- Engine Types: Mercury/MerCruiser marine applications where 8M0205729 or 26-70081 is specified
- HP Range: Not provided; verify by engine or drive model and parts diagram
- Serial Ranges: Not provided; verify by model, serial number, parts diagram, owner’s manual, or service manual
- Year Range: Not provided; verify by model year, serial number, and service manual
- UPC: Not provided
- Country of Origin: Not provided
- Prop 65: Not provided
- Package Dimensions: Not provided
- Package Weight: Not provided
- Supersedes / Replaces: 26-70081, 70081
- Fitment Note: Confirm compatibility by Mercury part number, engine or drive model, serial number, gearcase assembly, parts diagram, owner’s manual, or service manual before ordering.
What’s Included
- One Mercury 8M0205729 outer oil seal
Expanded Fitment
- Select Mercury lower unit oil seal applications
- Select MerCruiser gearcase oil seal applications where specified
- Propeller shaft seal service applications using part number 8M0205729
- Bearing carrier outer oil seal replacement applications using superseded part number 26-70081
- Not universal; fitment must be verified by exact part number and gearcase assembly
Why You Should Buy
- OEM Mercury replacement seal for applications requiring part number 8M0205729
- Helps prevent gear oil leaks and water entry around the propeller shaft area
- Ideal for lower unit reseal jobs, bearing carrier service, and gearcase maintenance
- Replaces superseded Mercury/MerCruiser oil seal 26-70081
- Small but critical part for protecting internal lower unit and gearcase components
Common Applications
- Outer propeller shaft oil seal replacement
- Lower unit gearcase reseal service
- Bearing carrier oil seal replacement
- Gear lubricant leak repair
- Water intrusion prevention during marine drivetrain service
- Mercury/MerCruiser lower unit maintenance where 8M0205729 is specified
FAQ
- What is Mercury 8M0205729 used for? It is an outer oil seal commonly used in select propeller shaft, bearing carrier, lower unit, and gearcase sealing applications.
- What part number does it replace? Mercury 8M0205729 supersedes or replaces 26-70081 and 70081.
- Is this a propeller shaft seal? Yes, it is commonly identified as a propeller shaft oil seal for compatible applications.
- Is this part horsepower-specific? No confirmed HP range was provided. Match this seal by part number, gearcase assembly, model, serial number, and parts diagram.
- Does this fit all Mercury or MerCruiser gearcases? No. Fitment is application-specific and must be verified before ordering.
- When should this oil seal be replaced? Replace it when there are signs of gear oil leakage, water intrusion, seal damage, prop shaft seal wear, or during a lower unit reseal service.
- How do I confirm fitment? Confirm using Mercury part number 8M0205729, superseded part number 26-70081, engine or drive serial number, gearcase diagram, owner’s manual, or service manual.