Compatible Applications

OEM & Cross Reference Numbers

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

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.

Searchable Terms

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