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Mercury Outboard Parts
Shop OEM and aftermarket Mercury outboard parts for maintenance, repair, troubleshooting, and complete engine rebuild projects. Browse Mercury marine parts by system, including cooling, fuel delivery, electrical and ignition, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Mercury outboard engine parts for a wide range of 2-stroke, FourStroke, EFI, Optimax, Pro XS, SeaPro, and Verado applications. Use your engine horsepower, model, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Mercury Outboard Parts by System
- Complete Powerheads
- Control Cables & Boxes
- Cooling System
- Cowlings & Components
- Electrical System
- Engine Oil
- Engine Rebuild Kits
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service & Oil Change Kits
- Service Manuals
- Steering Systems
- Throttle Components
- Transom & Midsection
- Trim System
- Wizard Performance Parts
Find the Correct Mercury Outboard Part
Mercury outboard parts can vary by horsepower, engine family, model year, and serial number range. If you are unsure which component fits your engine, use the OEM parts lookup to locate the original Mercury part number from an engine diagram.
Once you have the OEM part number, search Pro Marine to find available genuine Mercury and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Mercury Outboard Engine Families
Pro Marine supports many Mercury outboard applications across a wide horsepower range. Always confirm the engine serial number and model information before ordering parts.
- Portable and Midrange: Mercury 2.5HP through 60HP 2-stroke and FourStroke applications
- FourStroke and EFI: common 75HP through 300HP Mercury EFI and FourStroke platforms
- Pro XS: performance-oriented Mercury Pro XS outboards across multiple engine families
- Optimax: direct-injected 2-stroke Mercury Optimax engines, commonly 75HP through 250HP
- Verado: supercharged and naturally aspirated Mercury Verado applications from 135HP through current high-horsepower platforms
- SeaPro: commercial-duty Mercury SeaPro outboards used in professional and high-hour applications
Common Mercury Outboard Repair Areas
- Overheating: inspect the water pump, impeller, thermostat, poppet valve, cooling passages, and related cooling components.
- Hard starting or rough running: inspect fuel pumps, filters, injectors or carburetors, spark plugs, coils, sensors, and intake components.
- No spark or intermittent ignition: check ignition coils, stators, switch boxes, trigger assemblies, sensors, grounds, and wiring.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and internal engine components.
- Lower unit noise or water intrusion: inspect seals, bearings, gears, shafts, bearing carriers, and gear lube condition.
- Trim or steering problems: inspect trim motors, pumps, hydraulic components, steering cylinders, hoses, and related rigging parts.
Why Buy Mercury Outboard Parts from Pro Marine USA?
- OEM Mercury and aftermarket replacement options for many common applications.
- Parts for maintenance, repair, engine rebuilding, lower units, electrical systems, fuel systems, steering, trim, and rigging.
- OEM diagram and part-number lookup tools to help identify the correct part before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large inventory of Mercury service parts and hard-to-find marine engine components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Mercury outboard part?
Use the engine horsepower, model, serial number, and year whenever available. Mercury frequently uses serial-number ranges to identify engine families, so the serial number is often the most reliable way to confirm fitment.
Can I search Mercury parts by OEM part number?
Yes. Enter the Mercury OEM part number into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.
Do Mercury outboard parts vary by serial number?
Yes. Many Mercury components change by serial-number range even within the same horsepower or model family. Always compare the serial range listed for the part with your engine before ordering.
Do you carry parts for Mercury Optimax and Verado engines?
Yes. Pro Marine carries parts for many Mercury Optimax, Verado, Pro XS, EFI, FourStroke, and SeaPro applications, including maintenance, fuel, electrical, cooling, internal engine, lower unit, steering, and rigging components.
Do you carry both OEM and aftermarket Mercury parts?
Yes. Pro Marine offers genuine Mercury parts along with aftermarket replacement parts for many common Mercury outboard maintenance, repair, and rebuild applications.
What Mercury outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Mercury outboard parts often vary by serial-number range. Confirm your engine serial number and OEM part number whenever possible before ordering.
840836A1
840836A2
F694961-1
F6949611
18-2346
23200
42633
824519
8245191
9-78126
OEM Mercury High-Performance Marine Engine Oil
Mercury SAE 25W50 Synthetic Blend Marine Engine Oil - 1 Quart
Mercury 8M0078013 is a premium SAE 25W50 synthetic blend 4-stroke marine engine oil designed for Mercury Verado, Mercury Racing, FormulaRace, and other high-performance marine engines where Mercury specifies 25W50 FC-W marine oil.
This OEM Mercury marine oil helps provide excellent wear protection, corrosion resistance, viscosity stability, and sludge protection under demanding marine operating conditions.
Recommended Applications
| Engine Family | Application | Oil Specification | Notes |
|---|---|---|---|
| Mercury Verado | 4-Stroke Outboards | SAE 25W50 FC-W | Use where Mercury specifies 25W50 oil |
| Mercury Racing | High-Performance Outboards | SAE 25W50 FC-W | Recommended for Racing 4-stroke applications |
| FormulaRace Engines | Performance Marine Engines | SAE 25W50 FC-W | OEM Mercury recommendation |
| Mercury Racing Sterndrives | 525 EFI through 1650 | SAE 25W50 FC-W | High-horsepower sterndrive applications |
Mercury 25W50 marine engine oil is engineered specifically for high-load marine applications and is formulated to help protect against corrosion, varnish buildup, sludge formation, and viscosity breakdown in harsh marine environments.
This oil meets or exceeds FC-W marine oil requirements when SAE 25W50 oil is specified by Mercury Marine.
Always verify your owner's manual or service manual before ordering. Mercury uses multiple oil viscosities depending on engine family, horsepower range, operating temperature, and application.
This oil is specifically intended for applications where SAE 25W50 marine oil is required.
Available Oil Size Options
| Oil Package | Product | Best For |
|---|---|---|
| 1 Quart Bottle | Mercury 25W50 Marine Oil - 1 Quart | Top-offs, smaller oil changes, adding exact quantities |
| 1 Gallon Jug | Mercury Verado 25W50 Oil - 1 Gallon | Full oil changes and multi-engine service |
Complete Your Service
Mercury 25W50 Oil - 1 Gallon
OEM Mercury SAE 25W50 synthetic blend marine engine oil in the gallon size for Verado and Mercury Racing oil changes.
View Product
Mercury Verado Service Kits
OEM Mercury maintenance kits with filters, service components, and Mercury 25W50 engine oil for compatible Verado outboards.
View ProductWhat This Oil is Used For
Mercury 8M0078013 SAE 25W50 marine engine oil is used in high-performance Mercury marine engines requiring FC-W rated 25W50 oil protection.
It is commonly used in Mercury Verado outboards, Mercury Racing outboards, FormulaRace engines, and Mercury Racing sterndrive applications.
Mercury formulated this oil specifically for marine operating conditions, including sustained RPM operation, moisture exposure, corrosion resistance, and high engine loads.
This quart bottle is ideal for topping off engines, carrying onboard, or combining with gallon containers for complete oil changes.
Key Features and Benefits
- OEM Mercury Marine engine oil
- SAE 25W50 synthetic blend formulation
- Designed for high-performance marine engines
- Recommended for Mercury Verado applications
- Recommended for Mercury Racing outboards and sterndrives
- Provides excellent wear and corrosion protection
- Helps resist sludge and varnish buildup
- Maintains viscosity under demanding operating conditions
- Meets or exceeds FC-W marine oil requirements
- 1 quart bottle size
Oil Details
- Part Number: 8M0078013
- Mercury Number: 92-8M0078013
- Oil Type: Synthetic Blend Marine Engine Oil
- Viscosity: SAE 25W50
- Certification: FC-W Marine Oil
- Container Size: 1 Quart
- Brand: Mercury Marine
- Application: High-Performance 4-Stroke Marine Engines
FAQ
Is this the correct oil for Mercury Verado engines?
Yes, this oil is commonly recommended for Mercury Verado outboards where Mercury specifies SAE 25W50 FC-W marine engine oil.
Is this a full synthetic oil?
No. Mercury 8M0078013 is a synthetic blend marine engine oil.
Does this oil meet FC-W requirements?
Yes. This oil meets or exceeds marine engine manufacturer warranty requirements and recommendations for FC-W marine engine oil when SAE 25W50 is specified.
Can I use this in Mercury Racing applications?
Yes. Mercury specifically recommends this oil for many Mercury Racing four-stroke outboards and sterndrive engines.
How much oil does my engine require?
Oil capacity varies by engine model and application. Always check your owner's manual or service manual for exact oil quantity requirements.
Is this sold in larger containers?
Yes. Mercury also offers this oil in a 1 gallon container, linked above.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or marine industry professional? We offer dealer pricing for qualified 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.
- Oil and lubricants must be unopened and unused for return eligibility.
- Return authorization is required before sending items back.
Need help with a return or product question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0078013, 92-8M0078013, Mercury 25W50 oil, Mercury Verado oil, Mercury Racing oil, Mercury marine engine oil, Mercury 25W50 synthetic blend oil, Verado engine oil, Mercury Racing sterndrive oil, FormulaRace oil, Mercury FC-W oil, Mercury high-performance marine oil, Mercury 25W50 quart
8M0053665
8M0078013
18-6011
31640
31640A1
31640A2
31640A4
31640BK4
31640B4
31640Q4
31640T07
31640T4
31640T5
316403
316404
316405
41107-ZW1-003ZA
72436A1
8M0059338
18-6011
31640
31640A1
31640A2
31640A4
31640BK4
31640B4
31640Q4
31640T4
316403
316404
72436A1
8M0059338
Mercury Racing / Performance Outboard Steering
Mercury 848125 Spiral Lock Retaining Ring
The Mercury 848125 Spiral Lock Retaining Ring, also referenced as 53-848125, is a genuine OEM-style retaining ring used in select Mercury and Mariner high-performance outboard steering and swivel bracket assemblies.
This part is commonly found on performance and racing outboards, including select Pro Max, Super Mag, XS, Sport XS, Offshore, 300X, and 300XS applications. Exact fitment should always be verified by engine serial number and parts diagram before ordering.
Compatible Applications
| Brand | Engine Family | Application | System |
|---|---|---|---|
| Mercury / Mariner | 2.5L Performance | Pro Max, Super Mag, EFI, Offshore and related models | Swivel bracket / steering arm assembly |
| Mercury Racing | 200XS / 225X | Select DFI and performance models | Steering / swivel components |
| Mercury Racing | 250XS / 250 Sport XS | Select 3.0L DFI performance models | Steering / swivel components |
| Mercury Racing | 300 Pro Max / 300X / 300XS | Select 3.0L and 3.2L high-performance models | Steering / swivel components |
Important Fitment Note
Mercury 848125 is used on select high-performance and racing outboard applications. Because steering and swivel bracket parts can vary by model year, serial range, and bracket configuration, always confirm fitment using your engine serial number and OEM parts diagram before ordering.
OEM & Cross Reference Numbers
| Mercury OEM Part | 848125 |
|---|---|
| Mercury Reference | 53-848125 |
| Part Type | Spiral lock retaining ring |
| Common System | Swivel bracket / steering arm assembly |
What This Part Is Used For
A spiral lock retaining ring is used to hold components securely in place inside the steering or swivel bracket assembly. On high-performance Mercury outboards, small retaining parts like this are important for keeping steering and bracket components properly retained during operation.
This part is commonly replaced during steering arm, swivel bracket, clamp bracket, or heavy-duty steering service when the original retaining ring is removed, damaged, corroded, or no longer reusable.
Key Features and Benefits
- OEM-style spiral lock retaining ring for Mercury performance outboards.
- Commonly referenced as Mercury 848125 and 53-848125.
- Used in select steering arm and swivel bracket assemblies.
- Supports service on Pro Max, Super Mag, XS, Sport XS, Offshore, 300X, and 300XS style applications where specified by diagram.
- Small but important retaining component for bracket and steering service.
FAQ
What is Mercury 848125?
Mercury 848125, also shown as 53-848125, is a spiral lock retaining ring used in select Mercury outboard steering and swivel bracket assemblies.
What engines does this retaining ring fit?
It is used on select Mercury and Mariner high-performance outboards, commonly in 2.5L, 3.0L, and 3.2L performance families including Pro Max, Super Mag, XS, Sport XS, Offshore, 300X, and 300XS style applications.
Where is this part used?
It is commonly found in the swivel bracket and steering arm assembly, including short or heavy-duty bracket configurations where specified by the OEM parts diagram.
Should I verify fitment before ordering?
Yes. These assemblies can vary by serial number and bracket configuration, so confirm using your engine serial number and OEM diagram before ordering.
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 Terms
Mercury spiral lock retaining ring, Mercury Racing retaining ring, Mercury swivel bracket retaining ring, Mercury steering arm retaining ring, Pro Max retaining ring, 300X retaining ring, 300XS retaining ring.
Searchable Part Numbers
848125, 53-848125
824111
0775512
11150
18-2166
55857
66060
660602
660603
8M0140440
8M0140445
824110
850308
9-72460
835257A1
835257A25
835257K1
835257Q1
850515A1
