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Outboard Motor Parts | OEM & Aftermarket
Shop OEM and aftermarket outboard motor parts for Mercury, Yamaha, Suzuki, Honda, Johnson / Evinrude / E-TEC, Tohatsu / Nissan, and Chrysler / Force engines. Pro Marine USA carries parts for routine maintenance, troubleshooting, repair, and complete marine engine rebuilds.
Browse by outboard manufacturer or engine system, or use our OEM parts lookup to identify the correct part number before ordering. Find cooling, fuel, ignition, electrical, internal engine, lower unit, steering, trim, service kit, gasket, seal, and rebuild parts in one place.
Shop Outboard Parts by Manufacturer
Chrysler / Force Outboard Parts for Chrysler and Force outboard repair 
Honda Outboard Honda cooling, fuel, electrical, and engine parts 
Johnson / Evinrude / E-TEC Outboard Johnson, Evinrude, E-TEC, and OMC replacement parts 
Mercury Outboard Mercury and Mariner maintenance, repair, and rebuild parts 
Suzuki Outboard Suzuki service, lower unit, fuel, and engine parts 
Tohatsu / Nissan Outboard Tohatsu and Nissan outboard replacement parts 
Yamaha Outboard Yamaha maintenance, repair, lower unit, and rebuild parts Find the Correct Outboard Part
Not sure which part fits your engine? Start with the engine manufacturer, horsepower, model number, serial number, and year whenever available.
Our OEM parts lookup lets you view factory parts diagrams and identify the original part number for many popular outboard engines. Once you have the OEM number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Shop Outboard Parts by Engine System
Outboard engines use several interconnected systems. Select your manufacturer above to browse the exact categories available for your engine, including the following common repair and maintenance areas.
Common Outboard Problems and Where to Start
- Engine overheating: inspect the water pump, impeller, thermostat, pressure-control components, cooling passages, and engine anodes.
- Hard starting or rough idle: check fuel delivery, carburetor or injector operation, spark plugs, ignition components, filters, and intake sealing.
- Weak spark or no spark: test ignition coils, stators, switch boxes or ignition modules, sensors, wiring, grounds, and related electrical components.
- Low compression or poor power: inspect pistons, rings, cylinder condition, head and powerhead gaskets, bearings, and other internal engine components.
- Milky gear lube: inspect prop shaft, driveshaft, shift shaft, bearing carrier, and other lower unit seals for water intrusion.
- Lower unit or gearcase noise: inspect bearings, gears, clutch components, shafts, and gear lube condition before continued operation.
- Trim or steering problems: inspect hydraulic fluid level, seals, hoses, trim motors, pumps, steering cylinders, and mechanical connections.
Why Buy Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for major outboard engine brands.
- Marine engine parts for routine maintenance, professional repair, and complete rebuild projects.
- OEM diagram and part-number lookup tools to help identify the correct component before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large selection of service kits, engine parts, lower unit components, fuel system parts, electrical parts, steering, and rigging products.
- Same-day weekday shipping available on qualifying in-stock orders placed before the shipping cutoff.
OEM and Aftermarket Outboard Parts
OEM parts are supplied by the original engine manufacturer and are designed for the specific engine application. Aftermarket parts are replacement components produced by independent marine parts manufacturers and may provide additional availability or value for many common repairs.
Pro Marine carries both genuine OEM parts and quality aftermarket replacement parts for many outboard maintenance, repair, and rebuild applications. Always confirm fitment using the engine model, serial number, horsepower, year range, or OEM part number when available.
Frequently Asked Questions
How do I find the correct parts for my outboard motor?
Start by identifying the engine manufacturer, horsepower, model number, serial number, and year. Select the manufacturer above to browse by engine system, or use the OEM parts lookup to locate the original part number from a factory diagram.
Can I search Pro Marine by OEM part number?
Yes. If you already have the OEM part number, enter it 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.
What information should I have before ordering an outboard part?
Have the engine manufacturer, horsepower, model number, serial number, and year whenever possible. An OEM part number from the original component or parts diagram is especially helpful because visually similar parts may fit different engine families.
What is the difference between OEM and aftermarket outboard parts?
OEM parts come from the original engine manufacturer. Aftermarket parts are replacement components manufactured by other marine parts companies for compatible applications. Pro Marine carries both OEM and aftermarket options across many common outboard engine systems.
Are aftermarket outboard motor parts reliable?
Quality aftermarket marine parts are commonly used for maintenance, professional repair, and engine rebuilding. The best option depends on the application, manufacturer, availability, and customer preference.
Do you carry parts for older outboard motors?
Yes. Pro Marine carries parts for many older Mercury, Mariner, Johnson, Evinrude, Chrysler, Force, Yamaha, Honda, Suzuki, Nissan, and Tohatsu outboards. Availability varies by engine family and component.
What outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump impellers, complete water pump kits, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Outboard parts can vary by model, serial range, horsepower, and production year. Confirm the OEM part number or engine identification information whenever possible before ordering.
18-6011
31640
31640A1
31640A2
31640A4
31640BK4
31640B4
31640Q4
31640T4
316403
316404
72436A1
8M0059338
18-4303
18-4303-1
389556
391300
439085
777398
802104
878892
9-64112
0391988
0777449
10-4304K
18-4304
18-4304-1
387729
39090
391988
777449
802107
878893
9-64111
0388678
0390078
0439084
0777460
10-4302K
18-4300
18-4302
39350
439084
777460
802093
9-64102
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
0335503
0769630
10-503
333658
335503
35790
769630
335524
0338518
0777535
18-7108
18-7108-9
313893
338518
777535
802076
81450
5007850
