Low Pressure Electric Fuel Boost Pump – Mercury / Mariner OptiMax DFI Outboards

Marine-grade aftermarket replacement electric fuel boost pump for selected Mercury and Mariner 75–300 HP 2-stroke DFI outboard engines.

Designed to provide low-pressure fuel delivery within the engine's fuel vapour separator (VST) system, supporting reliable operation of the direct fuel injection system.

Fitment – UK & European Mercury / Mariner Outboards

2-Stroke OptiMax / DFI Engines

1.5L – 3-Cylinder Models

75 HP – OptiMax DFI
80 HP – Jet DFI
90 HP – OptiMax DFI
115 HP – OptiMax DFI
115 HP – Pro XS DFI
125 HP – Selected DFI models

3.0L – V6 Models

200 HP – OptiMax DFI / DTS
200 HP – Pro XS DFI
225 HP – OptiMax DFI / DTS
225 HP – Pro XS DFI
250 HP – OptiMax DFI
250 HP – Pro XS DFI

Additional Selected DFI Applications

225 HP – Sport XS
250 HP – Sport XS
300 HP – XS DFI

Important: Not every engine within the listed horsepower range uses this pump. Applications depend on engine model, serial number and VST configuration.

Replaces Mercury / Mariner Part Numbers

888733T02
888733T1

OEM part numbers are used for identification purposes only.

Product Details

Condition: New
Product: Electric Fuel Boost Pump
Type: Low Pressure Fuel Pump
Quality: Marine-Grade Aftermarket
Application: Mercury / Mariner Outboards
Engine Type: 2-Stroke DFI / OptiMax
Horsepower: 75–300 HP (selected models)
Installation Location: Fuel Vapour Separator (VST)
Quantity: 1 Fuel Pump

Important – Check Compatibility

Please confirm your engine model, serial number, original fuel pump reference and fuel system configuration before ordering.

This is a low-pressure fuel boost pump, not the high-pressure DFI fuel pump.

If the part looks the same as yours, this does not always mean it is the correct part for your outboard.

Why Buy From SSI Marine?

Workshop-tested aftermarket & OEM-spec parts
Same-day dispatch before 1 PM Monday–Friday
Royal Mail Tracked 24
UK stock – collection from Leigh, Greater Manchester
Technical support available

Buyer Responsibility: Please confirm compatibility before purchasing. Contact SSI Marine with your engine details if unsure.

75–300 HP Mercury Mariner Outboard Fuel Boost Pump OptiMax DFI 888733T02