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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.
877869A04
877869A07
877869R04
136451
136452
68V-13645-00-00
68136
881433
682-12414-A1-00
682-12414-00-00
83940
83940M
881433
18-99124
6H3-12414-A1-00
6H3-12414-00-00
62Y-12414-00-00
65W-12414-00-00
8M0177107
824853
8248531
804161
8M0157616
OEM Mercury Water Separating Fuel Filter
Mercury Fuel Filter 8M0166596 For 450R, 500R V8 & 500-600HP V12
The Mercury 8M0166596 fuel filter is an OEM Mercury water separating fuel filter used on select high-performance Mercury Racing V8 and large-displacement Mercury V12 outboards.
This filter fits Mercury Racing 450R and 500R V8 FourStroke outboards, along with Mercury 500HP-600HP V12 FourStroke outboards. It helps remove water and contaminants from the fuel system during scheduled maintenance.
Compatible Applications
| Brand / Family | Horsepower | Engine Platform | Application |
|---|---|---|---|
| Mercury Racing | 450R, 500R | V8 FourStroke | Water separating fuel filter |
| Mercury Verado / SeaPro | 500HP-600HP | V12 FourStroke | Water separating fuel filter |
This Mercury 8M0166596 fuel filter is for select Mercury Racing 450R and 500R V8 outboards and Mercury 500HP-600HP V12 outboards.
Always verify your engine model, serial number, and current filter number before ordering fuel system parts.
Part Numbers & Cross References
| Brand / Source | Part Number |
|---|---|
| Mercury Marine | 8M0166596 |
| Related Water-In-Fuel Sensor | 8M0157779 |
Related Fuel Sensor
Water-In-Fuel Sensor
Mercury 8M0157779 water-in-fuel sensor used with the 8M0166596 fuel filter assembly on compatible applications.
View ProductWhat This Fuel Filter is Used For
The Mercury 8M0166596 fuel filter is used to help remove water and contaminants from the fuel supply before fuel reaches sensitive engine components.
Clean fuel is especially important on high-performance Mercury Racing V8 and Mercury V12 outboards. Replacing the fuel filter during scheduled maintenance helps support fuel system reliability and engine performance.
Key Features and Benefits
- OEM Mercury water separating fuel filter
- Fits Mercury Racing 450R V8 outboards
- Fits Mercury Racing 500R V8 outboards
- Fits Mercury 500HP-600HP V12 FourStroke outboards
- Helps separate water from the fuel system
- Helps trap fuel contaminants before they reach the engine
- Used during scheduled fuel system maintenance
- Pairs with Mercury 8M0157779 water-in-fuel sensor
Part Details
- Part Number: 8M0166596
- Product Type: Water Separating Fuel Filter
- Brand: Mercury Marine
- Application: Mercury Racing V8 and Mercury V12 Outboards
- Common Fitment: 450R, 500R, 500HP V12, 600HP V12
- Related Sensor: 8M0157779 Water-In-Fuel Sensor
- OEM Mercury Part: Yes
FAQ
What engines does Mercury fuel filter 8M0166596 fit?
This filter fits select Mercury Racing 450R and 500R V8 outboards, along
with Mercury 500HP-600HP V12 FourStroke outboards.
Does this fit the Mercury 500R?
Yes. Mercury 8M0166596 is used on Mercury Racing 500R V8 applications.
Does this fit Mercury V12 outboards?
Yes. This filter is used on compatible Mercury 500HP-600HP V12 outboards.
What sensor goes with this fuel filter?
The related water-in-fuel sensor is Mercury part number 8M0157779, linked above.
Is this a genuine Mercury fuel filter?
Yes. This is an OEM Mercury Marine fuel filter.
When should I replace this fuel filter?
Replace the fuel filter during scheduled maintenance or any time fuel
contamination or water-in-fuel concerns are found.
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.
- Fuel filters must be new, unused, and in original packaging.
- Installed or fuel-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
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830749
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