8M0214974 Mercury MerCruiser 25861844 O Ring | Genuine Quicksilver OEM Part
8M0214974 Mercury MerCruiser 25861844 O Ring | Genuine Quicksilver OEM Part
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🔧 Product Description
Genuine Quicksilver U-Joint Seal Retainer / Bearing Carrier O-Ring - Part Number: 25-8M0214974
A genuine Quicksilver O-ring used on MerCruiser Bravo U-joint seal retainers and selected Mercury outboard propeller shaft bearing carriers. This is the current service replacement for 25-861844 and is used on Bravo drive upper seal retainer service, as well as Mercury 40HP to 60HP EFI and 75HP to 125HP DFI outboard bearing carrier applications where specified.
⚙️ Key Features
- Genuine Quicksilver OEM O-ring
- Correct current Mercury part number 25-8M0214974
- Supersedes earlier 25-861844 O-ring reference
- Used on MerCruiser Bravo U-joint seal retainer assemblies
- Also used on selected Mercury EFI / DFI outboard prop shaft bearing carrier assemblies
🚤 Compatibility
Commonly used on
- MerCruiser Bravo U-joint seal retainer assemblies
- MerCruiser Bravo upper gearcase service
- Mercury 40HP to 60HP EFI outboard propeller shaft bearing carrier assemblies
- Mercury 75HP to 125HP DFI / OptiMax outboard propeller shaft bearing carrier assemblies
Typically suits
- Engine / drive models:
- MerCruiser Bravo Drives - serial 0B664190 to 0F729999
- MerCruiser Bravo Sterndrives - serial 0F730000 to 0M100000
- MerCruiser Bravo - serial 0M100001 to 0W249999
- MerCruiser Bravo One - serial 0W250000 and up
- MerCruiser Bravo Two - serial 0B664190 to 0F729999
- MerCruiser Bravo Two - serial 0F730000 to 0M100000
- MerCruiser Bravo Two - serial 0M100001 to 0W249999
- MerCruiser Bravo Two - serial 0W250000 and up
- MerCruiser Bravo Three - serial 0B664190 to 0F729999
- MerCruiser Bravo Three - serial 0F730000 to 0M100000
- MerCruiser Bravo Three - serial 0M100001 to 0W249999
- MerCruiser Bravo Three - serial 0W250000 and up
- MerCruiser Bravo X One / Two / Three applications where O-ring 25-861844 / 25-8M0214974 is specified
- MerCruiser Bravo XR / XZ upper gearcase applications where O-ring 25-861844 / 25-8M0214974 is specified
- Mercury 40HP EFI 4-stroke outboard propeller shaft bearing carrier applications where specified
- Mercury 50HP EFI 4-stroke outboard propeller shaft bearing carrier applications where specified
- Mercury 60HP EFI 4-stroke outboard propeller shaft bearing carrier applications where specified
- Mercury 75 DFI 1.5L 3-cylinder - serial 0T980000 to 1B226999
- Mercury 75 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701
- Mercury 75 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736884
- Mercury 75 DFI 1.5L 3-cylinder - serial 1B736885 and up
- Mercury 80 Jet DFI 1.5L 3-cylinder - serial 1B586067 to 1B736884
- Mercury 80 Jet DFI 1.5L 3-cylinder - serial 1B736885 and up
- Mercury 90 DFI 1.5L 3-cylinder - serial 0T801000 to 1B226999
- Mercury 90 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701
- Mercury 90 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736884
- Mercury 90 DFI 1.5L 3-cylinder - serial 1B736885 and up
- Mercury 115 DFI 1.5L 3-cylinder - serial 0T801000 to 1B226999
- Mercury 115 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701
- Mercury 115 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736884
- Mercury 115 DFI 1.5L 3-cylinder - serial 1B736885 and up
- Mercury 115 Pro XS 1.5L 3-cylinder - serial 1B751825 and up
- Mercury 125 DFI 1.5L 3-cylinder - serial 1B736885 and up
- HP Range: Mercury 40HP - 125HP outboard bearing carrier applications, plus MerCruiser Bravo drive applications where specified
- Engine / Drive Type: Mercury EFI / DFI outboard and MerCruiser Bravo stern drive
- System Type: U-joint seal retainer O-ring / prop shaft bearing carrier O-ring
🔌 Function
The O-ring seals the U-joint seal retainer or propeller shaft bearing carrier depending on application. It prevents oil leakage and water intrusion around the retainer or carrier sealing surface.
⚠️ Common Signs of Failure
- Oil seepage around Bravo U-joint seal retainer
- Water intrusion into drive oil
- O-ring cut, flattened or hardened during service
- Failed gearcase pressure or vacuum test
- Replacement required during U-joint, upper seal or bearing carrier service
🔄 Supersession & Cross Reference
OEM Supersession Chain
- 25-8M0214974 → Supersedes 25-861844
- 25-861844 earlier OEM O-ring reference
OEM / Related Numbers
- 25-8M0214974
- 8M0214974
- 258M0214974
- 25-861844
- 861844
- 25861844
- Mercury 25-8M0214974
- Quicksilver 25-8M0214974
- U-joint seal retainer O-ring
- Bravo upper gearcase retainer O-ring
- Propeller shaft bearing carrier O-ring
- 25-97387 related Bravo upper gear housing O-ring
- 26-127091 related upper drive oil seal
- 26-807006 related upper drive oil seal
- 24-17997A1 related spring kit
- 26-16709A2 related Bravo upper seal kit
Aftermarket / Verified Equivalents
- Sierra: 18-7961
- Sierra: 18-7167
- SEI Marine: 95-205-04
- Mallory: 9-76569
📦 Condition
- Genuine Quicksilver part
- Brand new
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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