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Mercury Outboard Parts

Shop Mercury outboard motor parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, and routine service items. Browse OEM and replacement Mercury marine parts to support maintenance, repair, and rebuild projects.

Shop by System

Common Mercury Outboard Model References

This category supports many popular Mercury outboards across a wide horsepower range. Always confirm your model and serial number for best fitment.

  • Portable & Midrange: 2.5HP–60HP (2-stroke & FourStroke)
  • Performance: Pro XS and EFI platforms (75HP–300HP)
  • Direct Injection: Optimax models (75HP–250HP)
  • Premium Offshore: Verado models (135HP–400HP)
  • Commercial: SeaPro models (commonly 75HP–300HP)

Always confirm your exact horsepower, model year, and serial number to ensure proper part compatibility before ordering.

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Mercury IL 4 & 6 Cylinder Bore 2 7/8 Outer Diameter 3 1/8
Item#:
L048
Manufacturer:
La Sleeves
Available:
In Stock
Your Price:
136.80
Each
Mercury 2.0L Bore 3 1/8 Outer Diameter 3 5/16
Item#:
L047
Manufacturer:
La Sleeves
Available:
In Stock
Your Price:
148.20
Each
Mercury 3.0L 225-250Hp Bore Size 3.665
Item#:
3170S4
Cross Reference#:
9-53259
Manufacturer:
Wiseco
Available:
In Stock
Your Price:
179.72
Each
Mercury 200-225 2.4L
Item#:
116
Cross Reference#:
18-7810
18-7810
40390
40390
508432
9-37755
9-37755
90363A1
90363A1
Manufacturer Item:
90363A1
Manufacturer:
Engineered Marine Parts
Available:
In Stock
Your Price:
21.99
Each
Mercury 90-140 Inline 6
Item#:
115
Cross Reference#:
18-7813
18-7813
40370
40370
66599A3
66599A3
89031A3
89031A3
Manufacturer Item:
89031A3
Manufacturer:
GLM
Available:
In Stock
Your Price:
13.09
Each
Mercury 135-200 2.0L 2.4L
Item#:
114
Cross Reference#:
18-7812
18-7812
40360
508430
66599A2
89031A2
9-37751
Manufacturer Item:
89031A2
Manufacturer:
Engineered Marine Parts
Available:
In Stock
Your Price:
13.49
Each
Mercury 50-70 Inline 2-3cyls
Item#:
112
Cross Reference#:
18-7809
18-7809
40340
40340
508428
55278A3
55278A3
55278A4
55278A4
Manufacturer Item:
55278A4
Manufacturer:
Sierra
Available:
In Stock
Your Price:
8.19
Each
Mercury 75-85 Inline
Item#:
111
Cross Reference#:
18-7808
18-7808
18-7808
40330
40330
508427
55278A2
55278A2
55278A5
55278A5
9-37750
Manufacturer Item:
55278A5
Manufacturer:
Engineered Marine Parts
Available:
In Stock
Your Price:
7.99
Each
Mercury 2.4L
Item#:
L055
Manufacturer:
La Sleeves
Available:
In Stock
Your Price:
148.20
Each
Mercury 3 Cyilnder Bore 3.375 Outer Diameter 3.670
Item#:
L050
Manufacturer:
La Sleeves
Available:
In Stock
Your Price:
148.20
Each
Mercury 4 Cylinder Bore 3.375 Outer Diameter 3.670
Item#:
L053
Manufacturer:
La Sleeves
Available:
In Stock
Your Price:
142.50
Each
Mercury 3 Cylinder Bore 3.375 Outer Diameter 3.670
Item#:
L052
Manufacturer:
La Sleeves
Available:
In Stock
Your Price:
142.50
Each
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