Mercruiser Engine

OEM & Cross Reference Numbers

Mercury FSM / VST Seal Kit Fitment

The 7333 / 8M0133370 seal kit fits all of the engine families listed below. The individual fuel pumps inside the module vary by model and serial range, but this seal kit is common across these compatible Fuel Supply Module applications.

Mercury FSM Fuel Pump Selection Guide

Use this section to identify the pumps commonly found inside the Fuel Supply Module that uses the 7333 / 8M0133370 seal kit.

65-150 EFI - FSM Range 2B494019 thru 3B694498

Also used in compatible 200-300R 4.6L V8, 200-400HP L6 Verado, 175-225HP V6 and 200-300HP V8 applications.

Mercury OEM 883202 Low-Pressure Fuel Pump

Genuine Mercury low-pressure electric fuel pump for compatible FSM applications.

View OEM 883202 Pump

Pro Marine Replacement for 883202

Pro Marine aftermarket low-pressure FSM fuel pump for compatible Mercury applications.

View Pro Marine Low-Pressure Pump

65-150 EFI - 3B681565 & Present

Mercury 8M0245917 Low-Pressure Fuel Pump

Later low-pressure FSM pump used on select 65-150HP EFI applications, including the later FSM configuration.

View Mercury 8M0245917 Pump

450R 4.6L V8 Racing

200-300R 4.6L V8 & 200-400HP L6 Verado

Pro Marine 3288P High-Pressure Fuel Pump

High-pressure FSM pump for compatible L6 Verado and modern Mercury V6 / V8 applications.

View Pro Marine 3288P

65-150 EFI - FSM Range 2B494019 thru 3B694498

EMP 39612 High-Pressure Fuel Pump

High-pressure FSM fuel pump for select 65-150HP EFI applications using the earlier compatible FSM configuration.

View EMP 39612 High-Pressure Pump

65-150 EFI - 3B681565 & Present

Mercury 8M0245916 High-Pressure Fuel Pump

Later high-pressure Fuel Supply Module pump for compatible 65-150HP EFI, MerCruiser 4.5L / 6.2L, MIE and TowSports applications.

View Mercury 8M0245916 Pump

450R 4.6L V8 Racing

What This Seal Kit is Used For

Mercury Fuel Supply Modules contain electric fuel pumps, fuel passages, regulators and sealing surfaces that must remain fuel-tight. Whenever the module is disassembled for pump replacement or internal service, the O-rings and seals should be carefully inspected.

The Pro Marine 7333 / Mercury 8M0133370 seal kit provides replacement seals for compatible FSM assemblies so the module can be properly resealed during service.

When Should I Replace the FSM Seals?

• Whenever the Fuel Supply Module is opened for major service
• When replacing a high-pressure fuel pump
• When replacing a low-pressure fuel pump
• When existing seals are flattened, swollen, cracked or damaged
• When repairing an FSM fuel leak
• When contamination or deterioration is found during disassembly

Why Service the Entire Fuel Supply Module?

Fuel-pressure problems can originate on either side of the FSM. A weak low-pressure pump can starve a perfectly good high-pressure pump, while a failed high-pressure pump may prevent the EFI system from reaching operating pressure even when the module has plenty of fuel.

Before replacing components, test both fuel delivery and fuel pressure. If the module must be opened, inspect both pumps, electrical connections, fuel passages and all seals while access is available.

Key Features and Benefits

• Pro Marine Fuel Supply Module / VST seal kit
• Replaces Mercury OEM 8M0133370
• Fits a broad range of Mercury FSM applications
• Fits select 65-150HP EFI outboards
• Fits L6 Verado 200-400HP applications
• Fits modern Mercury 3.4L V6 engines
• Fits modern Mercury 4.6L V8 engines
• Fits select Mercury Racing 150R-500R applications
• Fits select Mercury 5.7L V10 applications
• Fits select 500-600HP 7.6L V12 applications
• Fits select MerCruiser 4.5L and 6.2L engines
• Fits select MIE and TowSports Fuel Supply Modules
• Low-pressure and high-pressure pump options organized above

FAQ

What OEM number does Pro Marine 7333 replace?
Pro Marine 7333 replaces Mercury FSM seal kit 8M0133370.

Is this a VST seal kit or an FSM seal kit?
It is used to reseal compatible Mercury Fuel Supply Module assemblies. These fuel modules are also commonly referred to as VST / fuel module assemblies when discussing marine EFI fuel-system service.

Does this fit Mercury L6 Verado?
Yes. Fitment includes numerous 200-400HP L6 Verado, Pro Verado and Racing applications shown above.

Does this fit Mercury 3.4L V6 and 4.6L V8 engines?
Yes. The verified fitment includes multiple V6, V8, SeaPro, Pro XS, Verado and Racing configurations.

Does it fit the Mercury V10?
Yes. The supplied Mercury catalog fitment includes select 5.7L V10 Verado, SeaPro and Racing applications.

Does it fit Mercury V12 engines?
Yes. Verified fitment includes select 500HP and 600HP 7.6L V12 SeaPro applications.

Does it fit MerCruiser engines?
Yes. The fitment includes select 4.5L MPI and 6.2L MPI MerCruiser, MIE and TowSports Fuel Supply Modules.

Which fuel pump goes with this seal kit?
There is no single pump for every application. The correct low-pressure and high-pressure pumps vary by engine family and FSM serial range. Use the Fuel Pump Selection Guide above.

Should the seals be replaced when changing an FSM pump?
Inspect the seals whenever the Fuel Supply Module is opened. Replacing worn, damaged or disturbed seals while the module is apart helps prevent having to disassemble the FSM again for a leak.

How do I confirm fitment?
Verify the engine model and serial number and confirm that the Mercury Fuel Supply Module diagram calls for seal kit 8M0133370.

Searchable Terms

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