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OEM Mercury Water-In-Fuel Sensor
Mercury Water-In-Fuel Sensor 8M0157779 For Verado, 450R, 500R, V10 & V12
The Mercury 8M0157779 water-in-fuel sensor is an OEM Mercury fuel system sensor used with compatible Mercury water-separating fuel filter assemblies.
This sensor fits select L6 Verado applications, Mercury Racing 450R and 500R V8 outboards, Mercury 350HP-425HP V10 outboards, and Mercury 500HP-600HP V12 outboards.
Compatible Applications
| Engine Family | Horsepower / Model | Engine Platform | Application |
|---|---|---|---|
| Mercury Verado | L6 Verado Models | Inline 6-Cylinder Verado | Water-in-fuel sensor |
| Mercury Racing | 450R, 500R | V8 FourStroke | Water-in-fuel sensor |
| Mercury Verado / FourStroke | 350HP-425HP | V10 FourStroke | Water-in-fuel sensor |
| Mercury Verado / SeaPro | 500HP-600HP | V12 FourStroke | Water-in-fuel sensor |
This Mercury 8M0157779 water-in-fuel sensor is used on select L6 Verado, 450R-500R V8 Racing, 350HP-425HP V10, and 500HP-600HP V12 outboard fuel filter applications.
Always verify your engine model, fuel filter assembly, and current sensor number before ordering.
Part Numbers & Cross References
| Brand / Source | Part Number |
|---|---|
| Mercury Marine | 8M0157779 |
| Related Fuel Filter | 8M0166596 |
Related Fuel Filter
Mercury Fuel Filter 8M0166596
OEM Mercury water-separating fuel filter used with this sensor on compatible 450R, 500R V8 and 500HP-600HP V12 applications.
View ProductWhat This Water-In-Fuel Sensor is Used For
The Mercury 8M0157779 water-in-fuel sensor monitors the fuel filter assembly for water accumulation and helps alert the operator when water is detected in the fuel system.
Water contamination can cause poor performance, corrosion, injector problems, and fuel system damage. Replacing a damaged or faulty water-in-fuel sensor helps maintain proper warning system function.
Key Features and Benefits
- OEM Mercury water-in-fuel sensor
- Fits select L6 Verado applications
- Fits Mercury Racing 450R and 500R V8 outboards
- Fits Mercury 350HP-425HP V10 outboards
- Fits Mercury 500HP-600HP V12 outboards
- Used with compatible Mercury water-separating fuel filter assemblies
- Helps detect water accumulation in the fuel system
- Pairs with Mercury fuel filter 8M0166596 on compatible applications
Part Details
- Part Number: 8M0157779
- Product Type: Water-In-Fuel Sensor
- Brand: Mercury Marine
- Application: Mercury Verado, Racing V8, V10, and V12 fuel systems
- Common Fitment: L6 Verado, 450R, 500R, 350-425HP V10, 500-600HP V12
- Related Fuel Filter: 8M0166596
- OEM Mercury Part: Yes
FAQ
What engines does Mercury 8M0157779 fit?
This sensor fits select L6 Verado applications, Mercury Racing 450R and
500R V8 outboards, Mercury 350HP-425HP V10 outboards, and Mercury
500HP-600HP V12 outboards.
Does this fit the Mercury 500R?
Yes. Mercury 8M0157779 is used on compatible Mercury Racing 500R V8
fuel filter applications.
Does this fit Mercury V10 outboards?
Yes. This sensor fits compatible Mercury 350HP-425HP V10 outboards.
What fuel filter goes with this sensor?
The related Mercury water-separating fuel filter is part number 8M0166596,
linked above.
What does a water-in-fuel sensor do?
It detects water accumulation in the fuel filter assembly so the engine
warning system can alert the operator to fuel contamination.
Is this a genuine Mercury part?
Yes. This is an OEM Mercury Marine water-in-fuel sensor.
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.
- Electrical sensors must be new, unused, and uninstalled.
- Installed or fuel-contaminated sensors 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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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
8M0166596, Mercury 8M0166596, Mercury fuel filter, Mercury water separating fuel filter, Mercury 450R fuel filter, Mercury 500R fuel filter, Mercury Racing fuel filter, Mercury V8 fuel filter, Mercury V12 fuel filter, Mercury 500HP V12 fuel filter, Mercury 600HP V12 fuel filter, Mercury Verado V12 fuel filter, Mercury SeaPro V12 fuel filter, Mercury 500R water separator, Mercury 450R water separator, Mercury water in fuel sensor, 8M0157779, Mercury fuel system maintenance, Mercury outboard fuel filter