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Fuel Filter Water Separator OE

Mercruiser Short Style 3 3/4" Long 25 Micron
Item#:
2893
Cross Reference#:
18-7844
3Y9022340
3Y9022340M
52444
52456
52456A1
55501
55501A1
57250
57250A1
60494
60494A1
60494A4
60494A5
604941
802893
802893A4
802893Q
802893Q01
802893Q4
802893T
805269
805269A4
8052691
806771
807172
807172A4
9-37800
9999937801
9999937851
9999937851M
Manufacturer Item:
802893Q01
Manufacturer:
Mercury Marine
Available:
In Stock
Your Price:
19.79
Each

Sensor, Fuel and Water

Mercury 2006 & up
Item#:
34012
Cross Reference#:
8M0021043
8M0214989
889330
Manufacturer Item:
8M0021043
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
40.16
Each

Mercury Fuel Filter 8M0166596 450R 500R V8 & 500-600HP V12

OEM Mercury Water Separating Fuel Filter for Racing V8 & V12 Outboards

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
Important Fitment Note:

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

Water-In-Fuel Sensor

Mercury 8M0157779 water-in-fuel sensor used with the 8M0166596 fuel filter assembly on compatible applications.

View Product

What 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.

Apply for a Dealer Account

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

Item#:
8M0166596
Cross Reference#:
8M0166596
Manufacturer Item:
8M0166596
Manufacturer:
Mercury Marine
Available:
In Stock
Your Price:
48.49
Each

Fuel Filter

Mercury 200-400Hp Verado 4-Stroke 6 cyl.
Item#:
5659
Cross Reference#:
8M0095659
8M0157616
Manufacturer Item:
8M0095659
Manufacturer:
Pro Marine
Available:
Out of Stock
Your Price:
35.99
Each

Fuel Filter, Spin On, OEM

Mercury 115-300 EFI/DFI 95-00 SportJet 240 EFI
Item#:
1845-1
Cross Reference#:
1845
18458A4
18458Q12
18458Q4
18458T12
18458T4
184584
184585
Manufacturer Item:
18458A4
Manufacturer:
Mercury Marine
Available:
In Stock
Your Price:
31.09
Each

Fuel Filter, Spin On

Mercury 115-300 EFI/DFI 96-00 SportJet 240 EFI
Item#:
1845
Cross Reference#:
18-7968
18-7968
18458A4
18458A4
18458Q12
18458Q4
18458T12
18458T4
184584
184585
9-37806
Manufacturer Item:
18458A4
Manufacturer:
Sierra
Available:
In Stock
Your Price:
26.19
Each

Fuel Filter

Mercury EFI DFI 95 & Below
Item#:
1846
Cross Reference#:
14571A1
17808A1
18-7967
18458A1
18458A2
18458A3
18458Q11
18458Q3
18458T11
18458T3
35-18458A 3
35-18458Q 3
9-37805
Manufacturer Item:
18458Q3
Manufacturer:
Sierra
Available:
In Stock
Your Price:
31.79
Each

Fuel Filter, Spin On

Mercury 115-300 EFI/DFI 96-00 SportJet 240 EFI
Item#:
1845P
Cross Reference#:
18458A4
18458Q12
18458Q4
18458T12
18458T4
184584
184585
Manufacturer Item:
18458A4
Manufacturer:
Pro Marine
Available:
Out of Stock
Your Price:
17.99
Each

Fuel / Water Filter Mini

Filter Assembly Up to 115hp Especially EFI Mini 10
Item#:
MAR-MINIF-IL-TR
Cross Reference#:
MAR-MINIF-IL-TR
MAR-M10EL-00-00
QB1-M10EL-10-00
18-7865
8M0154766
Manufacturer Item:
MAR-MINIF-IL-TR
Manufacturer:
Yamaha Outboard
Available:
In Stock
Your Price:
15.05
Each

Fuel Filter

Mercury 200-400Hp Verado 4-Stroke 6 cyl.
Item#:
8M0095659
Cross Reference#:
8M0095658
8M0095659
8M0095659
8M0157616
8M0157620
Manufacturer Item:
8M0095659
Manufacturer:
Mercury Marine
Available:
In Stock
Your Price:
38.49
Each

Fuel Water Separting Filter

Honda & Suzuki ALL
Item#:
18-7947
Cross Reference#:
17670-ZW1-030GH
9-37812
Manufacturer Item:
17670-ZW1-030GH
Manufacturer:
Sierra
Available:
In Stock
Your Price:
28.39
Each

Fuel Filter, Water Separator

Mercruiser Short Style 3 3/4" 21 Micron
Item#:
7844
Cross Reference#:
18-7844
3Y9022340
3Y9022340M
52444
52456
52456A1
55501
55501A1
57250
57250A1
60494
60494A1
60494A4
60494A5
604941
802893
802893A4
802893Q
802893Q01
802893Q4
802893T
805269
805269A4
8052691
806771
807172
807172A4
9-37800
9999937801
9999937851
9999937851M
Manufacturer Item:
802893Q01
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
9.79
Each
|◀ ◀ 1 - 12 of 52 ▶ ▶|
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