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Home > Outboard > Mercury Outboard

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

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.

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Advanced Sleeve, PORT .020

Mercury 300XS 06-07

Item#:

1194PSB

Manufacturer:

Advanced Sleeve

Available:

In Stock

Your Price:

149.05

Each

Qty:

ADV Sleeve W Port RS +.010

Mercury 2.5L Bore 3.500 Outer Diameter 3.720

Item#:

1041SB+1

Manufacturer:

Mercury Marine

Available:

Out of Stock

Your Price:

145.45

Each

Qty:

Pro Marine Square Fuel Pump for Mercury and Mariner 30-300HP

Premium Replacement for Mercury 14360A14 Through 14360A78

Pro Marine Premium Replacement Part

Pro Marine Square Fuel Pump for Mercury and Mariner 30-300HP

The Pro Marine 14360P Square Fuel Pump is a premium aftermarket replacement for Mercury and Mariner outboards using the popular 14360-series mechanical fuel pump. It provides a direct-fit, dependable alternative to the genuine Mercury assembly across numerous carbureted, EFI and Optimax applications.

Complete Square Mechanical Fuel Pump

This listing is for the complete engine-mounted square fuel pump assembly. It is not only a diaphragm or internal rebuild kit.

The pump uses crankcase pressure pulses to draw fuel from the boat's fuel supply and deliver it to the carburetors, fuel reservoir, vapor separator or Optimax fuel system, depending on the engine design.

Pro Marine item: 14360P
Replacement type: Mechanical diaphragm fuel pump
Primary Mercury reference: 14360A78

Why Choose the Pro Marine Replacement?

Pro Marine Branded

A Pro Marine replacement part developed for the marine repair and replacement-parts market.

Direct Replacement

Replaces numerous Mercury 14360-series square fuel-pump revisions.

Complete Pump

Replaces the complete square mechanical pump rather than only the internal diaphragm.

Excellent Value

An economical alternative for customers who do not require a genuine Mercury-branded component.

Broad Engine Coverage

Used on select Mercury and Mariner 30-300HP carbureted, EFI, DFI and Optimax engines.

Marine Parts Support

Supplied by Pro Marine USA with technical fitment assistance available before ordering.

OEM & Cross Reference Numbers

Mercury revised this square fuel-pump assembly numerous times. Match one of the numbers below to the original pump or to the number shown in the Mercury parts catalog.

Pro Marine 14360P

14360A14

14360A15

14360A16

14360A24

14360A27

14360A41

14360A43

14360A53

14360A66

14360A69

14360A71

14360A78

14360T75

15930A21

98766-C1

98766C1

99357A4

Mercury and Mariner Fitment Overview

This pump appears across many Mercury and Mariner engine families. Use the overview below to identify the general engine group, and then compare your engine serial number with the detailed fitment section.

Engine Family	Common Applications
30-60HP	Select 2-cylinder, 3-cylinder, 4-cylinder, Jet and BigFoot Mercury and Mariner models
65-125HP	Select 3-cylinder, 4-cylinder, 6-cylinder, Jet, Marathon, SeaPro, EFI and Optimax models
135-200HP	Select V6 carbureted, EFI, XR6, Magnum, Marathon, SeaPro and Optimax models
225-300HP	Select V6, EFI, DFI, Optimax, Pro Max, Pro XS, Marathon and SeaPro models

Common Mercury Optimax Applications

The Pro Marine 14360P is commonly used on the following Mercury Optimax, Pro XS and XS engine families when the original engine calls for one of the listed OEM fuel-pump numbers.

75HP Optimax

3-cylinder, 2004-2014

80HP Optimax

3-cylinder, 2006-2014

90HP Optimax

3-cylinder, 2004-2014

115HP Optimax

1.5L 3-cylinder, 2004-2014

125HP Optimax

1.5L 3-cylinder, 2006-2012

200HP Optimax

3.0L 6-cylinder, 1997-2002

225HP Optimax

3.0L 6-cylinder, 1998-2006

225HP Pro XS

3.0L, 2004-2018

250HP Pro XS

3.0L, 2006-2018

300HP Pro Max

3.0L, 1998-2005

300HP XS

3.2L, 2006-2017

Important Fitment Note

Mercury used several square fuel-pump revisions across engines with the same horsepower. Horsepower or model year alone is not enough to confirm fitment.

Match the OEM number on the original pump or verify the complete engine serial number in the detailed fitment information. The application should call for one of the listed 14360-series or related OEM numbers.

What This Fuel Pump Does

The square mechanical fuel pump uses pressure pulses from the engine crankcase to move fuel through the outboard's low-pressure fuel system.

Depending on the engine design, the pump may supply fuel directly to the carburetors or feed a fuel reservoir, vapor separator or Optimax fuel system.

Possible Symptoms of a Weak Fuel Pump

Hard starting or extended cranking
Engine stalls shortly after starting
Fuel starvation under load
Hesitation during acceleration
Loss of power at higher RPM
Engine runs better while the primer bulb is manually pumped
Fuel leakage around the pump or diaphragm housing

These symptoms can also result from restricted fuel filters, damaged fuel lines, air leaks, carburetor problems or other fuel-system faults. Diagnose the complete fuel system before replacing the pump.

Grouped Mercury Serial-Number Fitment

The serial-number ranges below are grouped where multiple horsepower or model families share the same catalog range. This keeps the information searchable without repeating identical serial ranges for every horsepower.

Engine Models	Serial Number Range	Catalog Notes
30, 40HP 3-cylinder	0G590000 through 0G760299	Select USA production models
40, 50HP 3-cylinder	0G760300 through 0T979999	Select USA and Belgium production models
50, 55, 60HP 3-cylinder	0G590000 through 0T979999	Includes listed standard, BigFoot and Jet applications
45, 50, 55, 60 Jet	0G590000 through 0T979999	Select USA and Belgium Jet models
65, 75, 90HP 3-cylinder	0D283222 through 0G960499	Select carbureted and early production applications
75, 80, 90, 115, 125HP Optimax	0T178500 and later listed production ranges	1.5L 3-cylinder DFI and Optimax models
100, 115, 125HP	0G960500 through 1B226999	Select 4-cylinder, EFI and related applications
135, 150, 175, 200HP V6	0G960500 through 1B226999	Select carbureted, EFI, XR6, Magnum, Marathon and SeaPro models
200, 225HP Optimax	0G960500 through 1B417701	Select 3.0L DFI and Optimax production ranges
225, 250HP Pro XS	1B226999 through listed later production ranges	Select 3.0L Pro XS applications
250, 275HP Verado and related models	Refer to OEM number and complete serial lookup	Catalog includes select production-specific applications
300HP Pro Max and XS	0T409000 through listed 1B-series ranges	Select 3.0L Pro Max and 3.2L XS applications

Serial-number verification is important.

Mercury catalog applications can differ by production country, engine configuration and serial break. Use the complete serial number and confirm that the parts catalog specifies one of the OEM numbers shown on this page.

Prefer the Genuine Mercury Fuel Pump?

The Pro Marine 14360P is the primary replacement featured on this page. Customers who prefer a genuine factory Mercury component can select the OEM version below.

Genuine Mercury OEM Option

Genuine Mercury Square Fuel Pump Kit

Genuine Mercury fuel-pump assembly for customers who prefer a factory OEM component. Match OEM number 14360A78 or one of its listed superseded references before ordering.

View Genuine Mercury Pump

Pro Marine vs. Genuine Mercury

Feature	Pro Marine 14360P	Genuine Mercury
Complete square fuel pump	Yes	Yes
Direct replacement application	Yes	Yes
Pro Marine branded part	Yes	No
Factory Mercury-branded component	No	Yes
Value-focused replacement option	Yes	Factory OEM option

Frequently Asked Questions

Is this a Pro Marine product?

Yes. Item 14360P is a Pro Marine-branded premium aftermarket replacement fuel pump.

Is this a complete fuel pump?

Yes. This is the complete square mechanical fuel-pump assembly, not only a diaphragm or rebuild kit.

Does this replace Mercury 14360A78?

Yes. Pro Marine 14360P is an aftermarket replacement for Mercury 14360A78 and the other listed superseded and cross-reference numbers.

Will this fit every Mercury 30-300HP outboard?

No. The 30-300HP range describes the combined application coverage. Fitment depends on the engine model, configuration, serial number and OEM fuel-pump number.

Why is the serial number important?

Mercury frequently used different components within the same horsepower and model family. The engine serial number identifies the exact production range and is more reliable than horsepower alone.

Does this fit Mercury Optimax engines?

It fits the listed Optimax, Pro XS and XS applications that call for one of the OEM fuel-pump numbers shown on this page.

Is the genuine Mercury version available?

Yes. Use the Genuine Mercury product card above to view the factory OEM version.

The Pro Marine Advantage

Pro Marine supplies marine professionals, repair facilities, dealerships and boat owners with replacement engine parts for Mercury, Yamaha, Suzuki, Johnson, Evinrude and other leading marine brands.

Pro Marine replacement parts are selected to provide dependable fitment, practical value and reliable service for the marine repair market.

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 in the 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 are accepted within 30 days of delivery.
Parts must be new, unused and in their original packaging.
Installed parts are not returnable.
Return authorization is required before sending items back.

Need help confirming fitment or have an order question?
Contact Us
Phone: 941-721-3000

Searchable Part Numbers & Applications

Pro Marine 14360P, 14360P, 14360A14, 14360A15, 14360A16, 14360A24, 14360A27, 14360A41, 14360A43, 14360A53, 14360A66, 14360A69, 14360A71, 14360A78, 14360T75, 15930A21, 98766-C1, 98766C1, 99357A4, Mercury square fuel pump, Mercury mechanical fuel pump, Mercury pulse fuel pump, Mariner square fuel pump, Mercury Optimax fuel pump, Mercury Pro XS fuel pump, Mercury 30HP fuel pump, Mercury 40HP fuel pump, Mercury 50HP fuel pump, Mercury 60HP fuel pump, Mercury 75HP fuel pump, Mercury 90HP fuel pump, Mercury 115HP fuel pump, Mercury 125HP fuel pump, Mercury 150HP fuel pump, Mercury 175HP fuel pump, Mercury 200HP fuel pump, Mercury 225HP fuel pump, Mercury 250HP fuel pump, Mercury 300HP fuel pump

Item#:

14360P

Cross Reference#:

14360A14
14360A15
14360A16
14360A24
14360A27
14360A41
14360A43
14360A53
14360A66
14360A69
14360A71
14360A78
14360T75
15930A21
98766-C1
98766C1
99357A4

Manufacturer Item:

14360A78

Manufacturer:

Pro Marine

Available:

Out of Stock

ETA:

11/01/2026

Your Price:

102.99

Each

Qty:

Oil Filter

Mercury 25-115HP EFI 96-UP Thread Spec: 20mm x 1.5

Item#:

18-7914

Cross Reference#:

HPFB15400014
15400-PFB-004
15400-PFB-014
15400-PJ7-015
15400-PM3-405
15400-ZZ3-003
3BJ076150
3BJ076150M
3R0076150
3R0076150M
3R0076151
3R0076151M
5GH-13440-00-00
5GH-13440-10-00
5GH-13440-30-00
5GH-13440-70-00
5GH-13440-71-00
5GH-13440-72-00
5041144
8M0008397
8M0065103
8M0065104
8M0154776
8M0154778
8M0162829
8M0162830
8M0162831
8M0162832
822626
822626A1
822626A2
822626B12
822626K03
822626K04
822626Q03
822626Q04
822626Q05
822626Q1
822626Q2
822626T1
822626T11
822626T12
822626T2
8226261
851847A02
877768K01

Manufacturer Item:

822626Q05

Manufacturer:

Sierra

Available:

In Stock

Your Price:

14.29

Each

Qty:

Mercury Verado V6 V8 175-400HP High Pressure Fuel Pump 3288P

Pro Marine Replacement for Mercury 8M0103288 FSM Fuel Pump

Pro Marine High-Pressure Fuel Supply Module Pump

Mercury Verado, 3.4L V6 & 4.6L V8 High-Pressure Fuel Pump - 3288P

The Pro Marine 3288P High-Pressure Fuel Pump is an aftermarket replacement for Mercury OEM 8M0103288. This pump is located inside the engine's Fuel Supply Module (FSM) and supplies high-pressure fuel for the engine's fuel-injection system.

Verified Mercury applications include select 200-400R 2.6L L6 Verado engines, modern 3.4L V6 and 4.6L V8 outboards, SeaPro, Pro XS, Verado, Mercury Racing 250R / 300R, AMS Racing, and select APX Racing applications.

Compatible Applications

Engine Family	Horsepower / Model	Serial Range
Mercury L6 Pro Verado	200HP	2B144123 thru 2B577715
Mercury L6 Pro Verado	250HP	2B144123 thru 2B577715
Mercury L6 Pro Verado	300HP	2B144123 thru 2B577715
Mercury 2.6L L6 Verado	350HP	2B141617 thru 3B342962
Mercury 2.6L L6 Pro Verado	350HP	2B141124 thru 3B342962
Mercury 2.6L L6 Verado	400HP	2B618256 thru 3B342962
Mercury Racing 2.6L L6	400R	2B141124 thru 3B342962
Mercury L6 Verado	200HP	2B144123 thru 2B578935
Mercury L6 Verado	225HP	2B144123 thru 2B578935
Mercury L6 Verado	250HP	2B144123 thru 2B578935
Mercury L6 Verado	275HP	2B144123 thru 2B578935
Mercury L6 Verado	300HP	2B144123 thru 2B578935
Mercury 3.4L V6	175HP	2B529482 & Present
Mercury 3.4L V6	200HP	2B529482 & Present
Mercury 3.4L V6	225HP	2B529482 & Present
Mercury 3.4L V6 SeaPro	200HP	2B529482 & Present
Mercury 3.4L V6 Pro XS	175HP	2B529482 & Present
Mercury 4.6L V8	250HP	2B529482 & Present
Mercury 4.6L V8	300HP	2B529482 & Present
Mercury 4.6L V8 SeaPro	225HP	2B529482 & Present
Mercury 4.6L V8 SeaPro	250HP	2B529482 & Present
Mercury 4.6L V8 CMS SeaPro	300HP	2B529482 & Present
Mercury 4.6L V8 AMS SeaPro	300HP	2B529482 & Present
Mercury 4.6L V8 Pro XS	200HP	2B529482 & Present
Mercury 4.6L V8 Pro XS	225HP	2B529482 & Present
Mercury 4.6L V8 Pro XS	250HP	2B529482 & Present
Mercury 4.6L V8 Pro XS	300HP	2B529482 & Present
Mercury 4.6L V8 Verado	250HP	2B529482 & Present
Mercury 4.6L V8 Verado	300HP	2B529482 & Present
Mercury Racing 4.6L V8	250R	1E080500 & Present
Mercury Racing 4.6L V8	300R	1E080500 & Present
Mercury AMS Racing 4.6L V8	300R	1E081459 & Present
Mercury Racing 3.4L V6 APX	200HP APX	1E054353 & Present
Mercury Racing 4.6L V8 APX	250HP APX	1E054548 & Present
Mercury Racing 4.6L V8 APX	360HP APX	1E054247 & Present

Important Fitment Note:

Mercury used different Fuel Supply Module components within similar horsepower and Verado engine families. Always verify your engine serial number and confirm that the FSM calls for high-pressure fuel pump 8M0103288 before ordering.

OEM & Cross Reference Numbers

Brand / Type	Part Number
Pro Marine	3288P
Mercury OEM	8M0103288

Fuel Supply Module Service Parts

The high-pressure pump works as part of the complete Mercury Fuel Supply Module (FSM). When servicing the FSM, inspect the low-pressure pump and internal seals at the same time. Pro Marine offers both OEM and aftermarket low-pressure pump options along with an FSM seal kit.

Mercury OEM Low-Pressure Fuel Pump

OEM low-pressure electric fuel pump used with compatible Mercury fuel supply module applications.

View OEM Low-Pressure Fuel Pump

Pro Marine Low-Pressure Fuel Pump

Pro Marine aftermarket low-pressure electric fuel pump option for compatible Mercury Fuel Supply Module applications.

View Pro Marine Low-Pressure Fuel Pump

Mercury Fuel Supply Module Seal Kit - 7333

Servicing or opening the Fuel Supply Module? Inspect and replace the internal FSM seals as needed while replacing the high- or low-pressure fuel pumps.

View FSM Seal Kit

What This Part is Used For

Mercury's Fuel Supply Module contains multiple components that work together to supply clean fuel at the pressure required by the engine. The 8M0103288 high-pressure pump is positioned inside the FSM and supplies pressurized fuel to the engine's fuel-injection system.

The FSM also contains a low-pressure fuel pump, regulator, internal tubing, seals, and other components. Mercury service diagrams identify 8M0103288 specifically as the high-pressure pump assembly.

Common Signs of High-Pressure Fuel Pump Problems

Hard starting or extended cranking
Engine starts but will not maintain proper fuel pressure
Loss of power under acceleration or heavy load
Engine hesitation at higher RPM
Fuel-pressure test indicates insufficient high-side pressure
High-pressure pump fails electrical or pressure testing

High-Pressure vs. Low-Pressure FSM Pump

Pump	Function
High-Pressure Pump - 3288P / 8M0103288	Produces the high fuel pressure required by the engine's fuel-injection system.
Low-Pressure Pump	Supplies fuel into / through the Fuel Supply Module so the high-pressure side can maintain proper fuel supply.

Why Service the Complete Fuel Supply Module?

When an FSM is already being disassembled to replace a fuel pump, it is a good time to inspect the other serviceable components. A problem on the low-pressure side can affect fuel delivery to the high-pressure pump, while deteriorated seals can cause leaks or other FSM problems.

For that reason, the OEM low-pressure pump, Pro Marine low-pressure pump, and FSM seal kit are linked above for convenient Fuel Supply Module service.

Key Features and Benefits

Pro Marine aftermarket high-pressure fuel pump
Replaces Mercury OEM 8M0103288
Installs inside compatible Mercury Fuel Supply Modules
Fits select 2.6L L6 Verado and Pro Verado applications
Fits select 200-300HP L6 Verado engines
Fits select 350HP, 400HP, and 400R L6 applications
Fits select modern Mercury 3.4L V6 outboards
Fits select modern Mercury 4.6L V8 outboards
Applications include SeaPro, Pro XS, Verado, Racing, and AMS Racing
Fits select Mercury Racing 250R and 300R engines
Fits select 200HP, 250HP, and 360HP APX Racing applications
Related low-pressure pumps and FSM seal kit linked above

FAQ

What OEM fuel pump does Pro Marine 3288P replace?
Pro Marine 3288P replaces Mercury high-pressure fuel pump 8M0103288.

Where is this fuel pump located?
It is located inside the Mercury Fuel Supply Module (FSM).

Is 8M0103288 the high-pressure or low-pressure pump?
8M0103288 is the high-pressure pump. Mercury's parts diagrams identify it separately from the low-pressure pump inside the FSM.

Does this fit Mercury L6 Verado engines?
Yes. Verified fitment includes select 200, 225, 250, 275, 300, 350, and 400HP L6 Verado applications along with select Pro Verado and 400R engines. Verify the serial range in the table above.

Does this fit the newer Mercury 3.4L V6?
Yes. Verified applications include select 175HP, 200HP, 225HP, SeaPro, and Pro XS 3.4L V6 engines beginning with the serial ranges shown above.

Does this fit Mercury 4.6L V8 engines?
Yes. Applications include select 200-300HP standard, SeaPro, Pro XS, Verado, 250R, 300R, and AMS Racing 4.6L V8 models.

Does it fit Mercury Racing APX engines?
The supplied Mercury application data includes select 200HP 3.4L V6 APX, 250HP 4.6L V8 APX, and 360HP 4.6L V8 APX applications.

Should I replace the low-pressure pump at the same time?
Not necessarily. Test and inspect both pumps when servicing the FSM. If the low-pressure pump is weak or failed, OEM and Pro Marine replacement options are linked above.

Should I replace the FSM seals when changing the pump?
Inspect the seals whenever the Fuel Supply Module is opened. The FSM seal kit is linked above so worn or disturbed seals can be replaced during service.

How do I verify fitment?
Use the engine model, horsepower, and especially the Mercury serial number. Confirm that the Fuel Supply Module parts diagram calls for high-pressure pump 8M0103288 before ordering.