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Mercury SAE 10W30 Full Synthetic Marine Engine Oil
Mercury 10W30 Full Synthetic 4-Stroke Marine Engine Oil
Mercury 8M0173224 SAE 10W30 Full Synthetic Marine Engine Oil is designed for customers wanting maximum protection for compatible non-catalyzed Mercury 4-stroke marine engines.
This advanced full synthetic marine oil formula delivers outstanding viscosity retention, corrosion protection, thermal stability, and engine wear protection across a broad range of marine operating conditions.
Compatible Applications
| Engine Type | Application | Oil Type |
|---|---|---|
| 4-Stroke Outboards | Compatible non-catalyzed Mercury outboards | SAE 10W30 Full Synthetic |
| Sterndrives | Compatible non-catalyzed Mercury sterndrive engines | SAE 10W30 Full Synthetic |
| Inboard Engines | Compatible non-catalyzed Mercury inboards | SAE 10W30 Full Synthetic |
Mercury SAE 10W30 Full Synthetic marine engine oil is intended for non-catalyzed 4-stroke marine engines.
Always verify the recommended oil viscosity and specification in your owner's manual before use.
Why Use Mercury Full Synthetic Marine Oil?
Mercury SAE 10W30 Full Synthetic marine engine oil is formulated to provide maximum protection for hard-working marine engines operating under heavy loads and harsh marine conditions.
Compared to Mercury 10W30 synthetic blend marine oil, this advanced full synthetic formula includes:
- 49% more anti-wear additives
- 45% more dispersants
- 24% more detergents
The result is outstanding protection against corrosion, sludge formation, varnish buildup, engine wear, and thermal breakdown.
Elevated ZDDP levels and Mercury's advanced multi-grade formulation help improve shear resistance and viscosity retention across a broad range of temperatures and marine operating conditions.
Key Features and Benefits
- Mercury SAE 10W30 Full Synthetic marine engine oil
- Designed for non-catalyzed 4-stroke marine engines
- Suitable for outboards, sterndrives, and inboards
- Advanced full synthetic marine oil formulation
- Outstanding viscosity retention for maximum engine protection
- Enhanced protection against engine wear and thermal breakdown
- Elevated zinc and phosphorous levels for anti-wear protection
- Helps reduce sludge and varnish buildup
- Excellent corrosion protection for marine environments
- Compatible with mineral and synthetic blend 10W30 formulas
- Safe upgrade path from conventional or synthetic blend oil
Oil Specifications
| Specification | Details |
|---|---|
| Part Number | 8M0173224 |
| Oil Type | Full Synthetic Marine Engine Oil |
| Viscosity | SAE 10W30 |
| Application | Non-Catalyzed 4-Stroke Marine Engines |
| Engine Types | Outboards, Sterndrives, and Inboards |
| Additive Package | Elevated ZDDP / Marine Anti-Wear Formula |
| Compatibility | Compatible with mineral and synthetic blend 10W30 oils |
What This Oil is Used For
Mercury SAE 10W30 Full Synthetic marine engine oil is designed for high-performance lubrication and protection of compatible non-catalyzed 4-stroke marine engines.
Marine engines operate under higher sustained loads and more demanding conditions than many automotive applications. This full synthetic formula is engineered to help maintain viscosity stability, corrosion protection, and wear resistance in harsh marine environments.
It is commonly used in compatible Mercury outboards, sterndrives, and inboard engines requiring SAE 10W30 marine oil.
FAQ
What engines can use Mercury SAE 10W30 Full Synthetic oil?
This oil is designed for compatible non-catalyzed 4-stroke outboards,
sterndrives, and inboard marine engines.
Is this oil full synthetic?
Yes. Mercury 8M0173224 is a full synthetic marine engine oil.
Can this oil be mixed with synthetic blend or conventional oil?
Yes. Mercury states this oil is compatible with mineral and synthetic blend
10W30 formulas for safe upgrading.
What makes this oil different from Mercury synthetic blend oil?
This full synthetic formula contains increased anti-wear additives,
dispersants, and detergents for improved engine protection and performance.
Does this oil help protect against corrosion?
Yes. This formula is specifically designed to help protect marine engines
against corrosion, thermal breakdown, sludge, and engine wear.
Should I verify viscosity before use?
Yes. Always verify the correct oil viscosity and specification
recommended by your engine manufacturer before use.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new and unopened in original packaging.
- Opened oil and lubricants may not be returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0173224, Mercury 10W30 full synthetic oil, Mercury SAE 10W30 marine engine oil, Mercury full synthetic marine oil, Mercury 4-stroke marine oil, Mercury sterndrive oil, Mercury inboard engine oil, Mercury outboard oil, Mercury full synthetic 10W30, Mercury marine lubricant, Mercury engine oil, Mercury synthetic marine oil, SAE 10W30 marine oil, Mercury ZDDP marine oil, Mercury non-catalyzed engine oil
OEM Mercury Outboard Oil Filter
Mercury Oil Filter 8M0123025 For V6, V8, FourStroke, Verado & Pro XS
The Mercury 8M0123025 oil filter is a genuine OEM Mercury replacement oil filter used on many Mercury FourStroke, Verado, Pro XS, and Mercury Racing outboards.
This filter replaces multiple Mercury and Quicksilver part numbers including 8M0176312, 877767K01, 877767Q01, 896546, and 896546T. It is commonly used across V6 and V8 FourStroke engines, L4 Verado models, Pro XS applications, and Racing models such as 150R, 200R, 250R, 300R, 450R, and 500R.
Common Compatible Applications
| Engine Family | Horsepower / Model | Engine Platform | Serial Reference |
|---|---|---|---|
| Mercury FourStroke V6 | 175HP-300HP | 3.4L V6 FourStroke | 2B529482 & Newer |
| Mercury FourStroke V8 | 200HP-300HP | 4.6L V8 FourStroke | 2B529482 & Newer |
| Mercury Pro XS | Select V6 & V8 Pro XS Models | FourStroke Pro XS | Verify by serial number |
| Mercury L4 Verado | 135HP, 150HP, 175HP, 200HP | L4 Supercharged Verado | Verify by original filter number |
| Mercury Racing 150R / 200R | 150R, 200R | 3.4L V6 FourStroke | 3B547096 & Newer |
| Mercury Racing 250R / 300R | 250R, 300R | 4.6L V8 FourStroke | 1E080500 & Newer |
| Mercury Racing 450R | 450R | 4.6L V8 Supercharged FourStroke | 1E083006 & Newer |
| Mercury Racing 500R | 500R | 4.6L V8 Supercharged FourStroke | 1E101365 & Newer |
Mercury has used and superseded this oil filter across multiple engine families, including FourStroke, Verado, Pro XS, and Mercury Racing models.
Always verify fitment by matching your current oil filter number, engine serial number, or OEM reference number before ordering.
Common OEM references include: 8M0123025, 8M0176312, 877767K01, 877767Q01, 896546, and 896546T.
Part Numbers & Cross References
| Brand / Source | Part Number |
|---|---|
| Mercury | 8M0123025 |
| Mercury | 8M0176312 |
| Quicksilver / Mercury | 877767K01 |
| Quicksilver / Mercury | 877767Q01 |
| Mercury | 896546 |
| Mercury | 896546T |
What This Oil Filter is Used For
The Mercury 8M0123025 oil filter is used during routine engine oil changes and scheduled maintenance on compatible Mercury outboards.
This filter helps remove contaminants from engine oil while supporting proper oil flow and pressure through Mercury marine engines.
Genuine Mercury oil filters are designed for marine operating conditions, including high RPM use, long service intervals, corrosion exposure, and demanding outboard applications.
Key Features and Benefits
- Genuine OEM Mercury oil filter
- Fits many Mercury V6 and V8 FourStroke outboards
- Fits select Mercury Verado and Pro XS applications
- Fits Mercury Racing 150R, 200R, 250R, 300R, 450R, and 500R models
- Replaces Mercury 8M0176312
- Replaces Quicksilver 877767K01 and 877767Q01
- Replaces Mercury 896546 and 896546T
- Designed for proper marine oil filtration and flow
- Helps protect internal engine components during operation
- Recommended during scheduled oil change service
Part Details
- Part Number: 8M0123025
- Product Type: Engine Oil Filter
- Brand: Mercury Marine
- Application: Select Mercury FourStroke, Verado, Pro XS, and Racing outboards
- Common Engine Families: V6 FourStroke, V8 FourStroke, L4 Verado, Mercury Racing
- Cross References: 8M0176312, 877767K01, 877767Q01, 896546, 896546T
- Service Use: Engine oil change and routine maintenance
- OEM Mercury Part: Yes
FAQ
What engines does Mercury oil filter 8M0123025 fit?
It fits many Mercury V6 and V8 FourStroke outboards, select Verado and
Pro XS applications, and Mercury Racing models including 150R, 200R,
250R, 300R, 450R, and 500R.
Does this oil filter fit the Mercury 500R?
Yes. This oil filter is used on the Mercury Racing 500R family.
What part numbers does 8M0123025 replace?
It replaces or cross-references to Mercury and Quicksilver numbers
8M0176312, 877767K01, 877767Q01, 896546, and 896546T.
Does this filter fit Mercury Verado engines?
Yes. This filter cross-references with older Mercury / Quicksilver filter
numbers used on select L4 Verado applications. Always verify by serial
number or original filter number.
Is this a genuine Mercury oil filter?
Yes. This is an OEM Mercury Marine oil filter.
When should I replace my oil filter?
Replace the oil filter during scheduled oil change service or according
to your Mercury owner’s manual maintenance schedule.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Filters must be new, unused, and in original packaging.
- Installed or oil-contaminated filters are not returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0123025, Mercury 8M0123025, Mercury oil filter 8M0123025, Mercury outboard oil filter, Mercury V6 oil filter, Mercury V8 oil filter, Mercury FourStroke oil filter, Mercury Verado oil filter, Mercury Pro XS oil filter, Mercury Racing oil filter, Mercury 150R oil filter, Mercury 200R oil filter, Mercury 250R oil filter, Mercury 300R oil filter, Mercury 450R oil filter, Mercury 500R oil filter, 8M0176312, 877767K01, 877767Q01, 896546, 896546T, Mercury L4 Verado oil filter, Mercury 3.4L V6 oil filter, Mercury 4.6L V8 oil filter, Mercury 500R service filter, Mercury 300R service filter
18-7921
8M0123025
8M0176312
877767K01
877767Q01
896546
896546T
OEM Mercury MerCruiser 25W40 Oil Change Kit
MerCruiser 3.8L & 4.3L V6 Sterndrive Oil Change Kit
This OEM Mercury MerCruiser oil change kit contains the routine maintenance components needed to service compatible MerCruiser 3.8L and 4.3L V6 sterndrive engines without a remote oil filter kit.
The kit includes five quarts of FC-W(CAT) Certified Mercury SAE 25W40 4-stroke marine engine oil, premium oil filter, and service instructions to help simplify routine engine oil maintenance.
Compatible Applications
| Brand | Engine | Engine Type | Application Notes |
|---|---|---|---|
| MerCruiser | 3.8L V6 | 4-Stroke Sterndrive | Without remote oil filter kit |
| MerCruiser | 4.3L V6 | 4-Stroke Sterndrive | Without remote oil filter kit |
What is Included
| Qty | Included Part | Part Number |
|---|---|---|
| 5 | Mercury SAE 25W40 FC-W(CAT) 4-Stroke Marine Engine Oil | Included |
| 1 | Premium Mercury Oil Filter | Included |
| 1 | Mercury Oil Change Instructions | Included |
What This Kit is Used For
This Mercury MerCruiser oil change kit provides the routine maintenance parts needed to perform an engine oil and oil filter service on compatible MerCruiser 3.8L and 4.3L V6 sterndrive engines.
Mercury SAE 25W40 FC-W(CAT) Certified marine engine oil is formulated specifically for marine environments and includes corrosion inhibitors and additives designed to help protect internal engine components during operation and storage.
The oil formulation is engineered to maintain lubricity and viscosity retention during demanding marine operation and extended engine load conditions.
Routine oil and filter maintenance helps support proper lubrication, reduce internal engine wear, and maintain long-term engine reliability.
Dispose of used engine oil properly according to local environmental regulations.
Key Features and Benefits
- OEM Mercury MerCruiser oil change kit for 3.8L and 4.3L V6 sterndrive engines
- Designed for engines without remote oil filter kit
- Includes five quarts of Mercury SAE 25W40 FC-W(CAT) marine engine oil
- Includes premium Mercury oil filter
- Marine-specific additive package with corrosion inhibitors
- Designed for demanding marine engine operation
- Helps support long-term engine protection and performance
- Convenient all-in-one maintenance kit
Oil Kit Details
- Kit Part Number: 8M0182227
- Engine Compatibility: MerCruiser 3.8L & 4.3L V6 Sterndrive
- Application Note: Without remote oil filter kit
- Oil Type: Mercury SAE 25W40 FC-W(CAT) 4-Stroke Marine Engine Oil
- Oil Quantity: 5 Quarts
- Included Components: Engine oil, oil filter, and instructions
- Service Type: Routine engine oil and oil filter maintenance
FAQ
What engines does this oil change kit fit?
This kit fits compatible MerCruiser 3.8L and 4.3L V6 4-stroke sterndrive engines
without a remote oil filter kit.
How much oil is included in this kit?
This kit includes five quarts of Mercury SAE 25W40 FC-W(CAT)
4-stroke marine engine oil.
What does FC-W(CAT) Certified mean?
FC-W(CAT) certification indicates the oil meets marine industry standards
for corrosion protection, lubrication performance, and marine engine durability.
Does this kit include an oil filter?
Yes. This kit includes a premium Mercury oil filter for compatible
MerCruiser sterndrive engines.
Can I perform this oil change service myself?
Yes. Many boat owners perform routine oil and filter maintenance themselves
using basic hand tools and the proper service parts. Always follow your
engine manufacturer’s service procedures and verify proper oil capacity
before operation.
If you do not feel comfortable performing maintenance yourself, a Mercury-certified marine technician can typically complete this service quickly and help verify your engine is operating properly.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0182227, MerCruiser 3.8 oil change kit, MerCruiser 4.3 oil change kit, MerCruiser V6 oil kit, MerCruiser sterndrive oil kit, Mercury sterndrive maintenance kit, Mercury 25W40 marine oil kit, FC-W CAT marine oil, MerCruiser oil filter kit
8M0182227
OEM Mercury 25W40 Sterndrive & Inboard Oil Change Kit
MerCruiser Sterndrive & Inboard Oil Change Kit
This OEM Mercury oil change kit contains the routine maintenance components needed to service many popular MerCruiser sterndrive and inboard marine engines.
The kit includes six quarts of FC-W(CAT) Certified Mercury SAE 25W40 4-stroke marine engine oil, premium Mercury oil filter, and service instructions to help simplify routine engine oil maintenance.
Compatible Applications
| Engine Platform | Engine Type | Application Notes |
|---|---|---|
| MerCruiser Inline 4-Cylinder | Sterndrive & Inboard | Select compatible models |
| MerCruiser Inline 6-Cylinder | Sterndrive & Inboard | Select compatible models |
| MerCruiser V6 | Sterndrive & Inboard | With remote oil system |
| MerCruiser 4.5L V8 | Sterndrive & Inboard | Small-block engine applications |
| MerCruiser 5.0L V8 | Sterndrive & Inboard | Small-block engine applications |
| MerCruiser 5.7L V8 | Sterndrive & Inboard | Small-block engine applications |
| MerCruiser 6.2L V8 | Sterndrive & Inboard | Small-block engine applications |
| MerCruiser 7.4L | Sterndrive & Inboard | Requires additional oil not included |
| MerCruiser 8.1L | Sterndrive & Inboard | Requires additional oil not included |
| MerCruiser 8.2L | Sterndrive & Inboard | Requires additional oil not included |
What is Included
| Qty | Included Part | Part Number |
|---|---|---|
| 6 | Mercury SAE 25W40 FC-W(CAT) 4-Stroke Marine Engine Oil | Included |
| 1 | Premium Mercury Oil Filter | Included |
| 1 | Mercury Oil Change Instructions | Included |
What This Kit is Used For
This Mercury Sterndrive & Inboard oil change kit provides the routine maintenance parts needed to perform an engine oil and oil filter service on many compatible MerCruiser marine engines.
Mercury SAE 25W40 FC-W(CAT) Certified marine engine oil is formulated specifically for marine environments and includes advanced corrosion inhibitors designed to help protect internal engine components during operation and storage.
The oil formulation is engineered to maintain lubricity and viscosity retention during demanding marine operation and extended engine load conditions.
Routine oil and filter maintenance helps support proper lubrication, reduce internal engine wear, and maintain long-term engine reliability.
Dispose of used engine oil properly according to local environmental regulations.
Key Features and Benefits
- OEM Mercury oil change kit for MerCruiser sterndrive and inboard engines
- Fits many inline 4-cylinder, inline 6-cylinder, V6, and V8 marine engine applications
- Includes six quarts of Mercury SAE 25W40 FC-W(CAT) marine engine oil
- Includes premium Mercury oil filter
- Marine-specific additive package with corrosion inhibitors
- Designed for demanding marine engine operation
- Helps support long-term engine protection and performance
- Convenient all-in-one maintenance kit
Oil Kit Details
- Kit Part Number: 8M0182228
- Engine Compatibility: MerCruiser sterndrive and inboard marine engines
- Oil Type: Mercury SAE 25W40 FC-W(CAT) 4-Stroke Marine Engine Oil
- Oil Quantity: 6 Quarts
- Included Components: Engine oil, oil filter, and instructions
- Service Type: Routine engine oil and oil filter maintenance
FAQ
What engines does this oil change kit fit?
This kit fits many compatible MerCruiser inline 4-cylinder,
inline 6-cylinder, V6, and V8 sterndrive and inboard marine engines.
Will this kit work for 7.4L, 8.1L, and 8.2L MerCruiser engines?
Yes, but these larger displacement engines typically require
one to two additional quarts of Mercury SAE 25W40 engine oil
that is not included in this kit.
What does FC-W(CAT) Certified mean?
FC-W(CAT) certification indicates the oil meets marine industry standards
for corrosion protection, lubrication performance, and marine engine durability,
including catalyst-compatible applications.
Does this kit include an oil filter?
Yes. This kit includes a premium Mercury oil filter for compatible
MerCruiser marine engine applications.
Can I perform this oil change service myself?
Yes. Many boat owners perform routine oil and filter maintenance themselves
using basic hand tools and the proper service parts. Always follow your
engine manufacturer’s service procedures and verify proper oil capacity
before operation.
If you do not feel comfortable performing maintenance yourself, a Mercury-certified marine technician can typically complete this service quickly and help verify your engine is operating properly.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0182228, MerCruiser oil change kit, Mercury sterndrive oil kit, MerCruiser V8 oil kit, MerCruiser inboard oil kit, Mercury 25W40 marine oil, FC-W CAT marine oil, MerCruiser 7.4 oil kit, MerCruiser 8.1 oil kit, MerCruiser 8.2 oil kit
8M0182228
Genuine Mercury Marine Gearcase Drain Plug Seal
Mercury 8M0082880 Lower Unit Drain Plug Seal
Mercury Marine 8M0082880 is an OEM gearcase drain plug seal / washer used on select Mercury, Mariner and related outboard applications. Cross-reference information also connects this seal to select Johnson, Evinrude, Nissan and Tohatsu outboards.
This small but important seal installs at the gearcase drain screw and helps keep gear lubricant inside the lower unit while preventing water from entering around the drain plug.
Drain plug seals should be inspected whenever the lower-unit gear lube is serviced and replaced when worn, damaged or as specified during routine gear-lube maintenance.
Part Type: Gearcase Drain Plug Seal / Washer
Manufacturer: Mercury Marine
Manufacturer Item #: 8M0082880
OEM or Aftermarket: OEM
Color: Blue
Application: Select Outboard Gearcase Drain Screws
Pro Marine Item #: 8M0082880
OEM and Cross Reference Numbers
Depending on manufacturer, catalog and aftermarket brand, this drain plug seal may be found under several different part numbers.
| Cross Reference Numbers |
|---|
| 18-60103, 18-72656, 332600060, 332600060M, 332600061, 332600061M, 5040030, 8M0075255, 8M0082880, 8M0188617, 898101080, 95220, 95220010 |
When replacing an existing seal, compare the original part number and verify the engine model or serial number before ordering.
What This Part is Used For
The 8M0082880 seal fits around the applicable lower-unit drain/fill screw. When the screw is tightened, the seal helps create a reliable barrier between the gearcase and the surrounding water.
A properly sealing drain screw is important because the lower unit needs to:
- Keep gear lubricant inside the gearcase
- Help prevent water from entering through the drain screw
- Maintain a reliable seal after routine gear-lube service
A drain plug seal is inexpensive compared with the gears, bearings and other components inside a lower unit.
Inspect the seal whenever the gear lube is changed. Replace a seal that is worn, damaged, distorted or otherwise unsuitable for reuse.
Mercury and Mariner Fitment
Mercury 8M0082880 appears in gearcase, driveshaft-housing and maintenance diagrams across a number of small Mercury outboard families. Applications shown in the supplied Mercury catalog information include the following.
| Mercury Application | Serial Range / Notes |
|---|---|
| 4 / 5 / 6 HP Carb | 0R411838-Present |
| 5 HP Propane | 0R936270-1R280495 |
| 6 HP EFI 2-Cylinder 209cc | 1R363055-Present |
| 8 HP EFI 2-Cylinder 209cc | 1R281445-Present |
| 9.9 HP EFI 2-Cylinder 209cc | 1R281445-Present |
| 9.9 HP EFI ProKicker 2-Cylinder 209cc | 1R281445-Present |
| 9.9 HP EFI ProKicker 2-Cylinder 333cc | 1R008146-1R278792 |
| 10 HP EFI 2-Cylinder 333cc | 0R833820-Present |
| 15 HP EFI 2-Cylinder 333cc | 0R833820-Present |
| 15 HP EFI SeaPro 2-Cylinder 333cc | 0R833820-Present |
| 20 HP EFI 2-Cylinder 333cc | 0R833820-Present |
| 25 HP EFI 3-Cylinder | 1R154758-Present |
| 25 HP EFI SeaPro 3-Cylinder | 1R154758-Present |
| 25 HP EFI Jet 3-Cylinder | 1R154758-Present |
| 30 HP EFI 3-Cylinder | 1R154758-Present |
Additional earlier Mercury applications are shown in the supplied catalog diagrams, including select carbureted 8, 9.9, 10, 15, 20 and 25 HP models and earlier 25/30 HP EFI applications. Because Mercury used multiple gearcase configurations within some horsepower families, verify the engine serial number and gearcase diagram when working with an earlier engine.
Johnson and Evinrude Fitment
Cross-reference data also identifies this seal for numerous Johnson and Evinrude 3-15 HP four-stroke model-number applications. Matching model families include:
| Brand | Horsepower | Model Families |
|---|---|---|
| Johnson | 3 HP | B3R4, B3RG4 |
| Johnson | 4 HP | B4R4, B4RG4, B4RGL4, B4RL4 |
| Johnson | 6 HP | B6R4, B6RG4, B6RGL4, B6RL4, B6RX4 |
| Johnson | 10 HP | B10EGL4, B10EL4, B10PL4, B10PX4, B10R4, B10RG4, B10RGL4, B10RL4, B10TEL4, B10TPL4, B10TPX4 |
| Johnson | 15 HP | B15PL4, B15R4, B15RG4, B15RGL4, B15RL4, B15TE4, B15TEL4 |
| Evinrude | 3 HP | E3R4, E3RG4 |
| Evinrude | 4 HP | E4R4, E4RL4 |
| Evinrude | 6 HP | E6R4, E6RG4, E6RGL4, E6RL4, E6RX4 |
| Evinrude | 10 HP | E10EL4, E10PGL4, E10PL4, E10PX4, E10R4, E10RG4, E10RGL4, E10RL4, E10TEL4, E10TPL4, E10TPX4 |
| Evinrude | 15 HP | E15PGL4, E15PL4, E15R4, E15RG4, E15RGL4, E15RL4, E15TE4, E15TEG4, E15TEL4 |
The complete model suffix matters. When identifying this seal by Johnson or Evinrude model number, compare the complete engine model designation with the parts catalog rather than relying only on horsepower.
Nissan and Tohatsu Applications
Cross-reference information also shows this drain-plug seal across a broad range of older Nissan and Tohatsu outboard gearcase applications.
Supplied application data includes Nissan engines from approximately 2 HP through 140 HP across various 1996-2008 applications, including 2.5, 3.5, 4, 5, 6, 8, 9.8, 9.9, 15, 18, 20, 25, 30, 35, 40, 50, 60, 70, 90, 115, 120 and 140 HP listings.
The supplied data also specifically includes a 1996 Tohatsu 90 HP application.
The Nissan and Tohatsu application data spans multiple years, horsepower ranges and assemblies. Do not assume every engine of a listed horsepower uses this seal.
Verify the exact model, year and original drain-plug seal part number before ordering.
Pro Marine Aftermarket Version Available
Looking for an aftermarket alternative? Pro Marine also stocks the 9522P drain plug seal for customers who do not require the genuine Mercury-branded part.
This gives dealers, service shops and boat owners a choice between OEM Mercury 8M0082880 and the Pro Marine aftermarket 9522P.
View Pro Marine 9522P Drain Plug SealOEM Mercury or Pro Marine?
| Option | Part Number | Brand |
|---|---|---|
| OEM | 8M0082880 | Mercury Marine |
| Aftermarket | 9522P | Pro Marine |
Replace the Seal When Servicing Gear Lube
Mercury recommends replacing the seal when changing gear lubricant or whenever the existing seal shows signs of wear or damage.
During lower-unit service:
- Remove the applicable gearcase drain/fill screw.
- Remove and inspect the existing seal.
- Drain and refill the gearcase according to the engine manufacturer's procedure.
- Install the correct drain-plug seal.
- Reinstall and tighten the screw according to the manufacturer's specification.
- Inspect the area for leakage after service.
Why the Lower Unit Drain Plug Seal Matters
Outboard gearcases operate submerged in water. The drain and fill screws therefore need reliable seals.
A damaged or incorrectly installed seal can compromise the sealing point around the screw. Water contamination can reduce the lubricating ability of the gear oil and may contribute to internal gearcase damage.
If drained gear lube appears unusually milky or shows other signs of water contamination, the gearcase should be inspected rather than simply refilled and returned to service.
Key Features and Benefits
- Genuine Mercury Marine OEM part
- Manufacturer item number 8M0082880
- Gearcase drain plug seal / washer
- Blue seal/washer
- Helps keep gear lubricant inside the lower unit
- Helps prevent water intrusion at the applicable drain screw
- Used on select Mercury and Mariner outboards
- Cross-references to select Johnson, Evinrude, Nissan and Tohatsu applications
- Multiple OEM and aftermarket cross-reference numbers
- Pro Marine 9522P aftermarket alternative available
FAQ
What is Mercury 8M0082880?
It is an OEM Mercury Marine gearcase drain plug seal / washer
used on select outboard lower units.
What does the drain plug seal do?
It seals the applicable gearcase drain/fill screw to help keep gear lube
inside the lower unit and water outside.
Should I replace the drain plug seal when changing gear lube?
Mercury recommends replacing the seal during gear-lube changes or when
the existing seal shows signs of wear or damage.
Does 8M0082880 replace 95220?
Yes. 95220 is one of the listed cross-reference /
superseded numbers associated with 8M0082880.
Does 8M0082880 replace 8M0075255?
Yes. 8M0075255 is listed as a cross reference for
Mercury 8M0082880.
Does it cross to Sierra 18-60103?
Cross-reference data associates 18-60103 with this
drain-plug seal application.
Does this fit Johnson and Evinrude outboards?
Cross-reference data includes numerous Johnson and Evinrude 3-15 HP
four-stroke model-number applications. Verify the complete engine model
number before ordering.
Does this fit Nissan and Tohatsu outboards?
Cross-reference data includes numerous Nissan and Tohatsu applications.
Because the supplied application list spans multiple horsepower ranges,
years and gearcase designs, verify the exact model and original part
number before ordering.
Is there an aftermarket version?
Yes. Pro Marine stocks the
9522P Pro Marine Drain Plug Seal
as an aftermarket alternative.
Is 8M0082880 OEM?
Yes. This listing is for the genuine Mercury Marine OEM
version.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Part Numbers
8M0082880, 8M0075255, 8M0188617, 898101080, 95220, 95220010, 18-60103, 18-72656, 332600060, 332600060M, 332600061, 332600061M, 5040030, 9522P
Searchable Terms
Mercury drain plug seal, Mercury lower unit drain washer, Mercury gearcase drain seal, Mercury drain screw gasket, Mercury gear lube drain washer, Johnson drain plug seal, Evinrude drain plug seal, Tohatsu drain plug washer, Nissan outboard drain plug seal, lower unit drain screw seal, outboard gearcase washer
18-72656
332600060
332600060M
332600061
332600061M
5040030
8M0075255
8M0082880
8M0188617
898101080
95220
95220010
