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MerCruiser® EFI Replacement Parts

Find the Right EFI Part for Your MerCruiser

Don't guess by engine size alone.

Verify your application before you order.

Engine Serial NumberMost accurate

Find My EngineDon't have your serial number?

Search OEM Part Number

Current or historical Mercury/MerCruiser® part number

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Less time chasing the wrong part.

Shop by EFI Component

Application-verified aftermarket replacements for MerCruiser® EFI systems.

Fuel Injectors

MPI and TBI injectors for all covered applications

MAP & MAPT Sensors

Manifold absolute pressure sensors

Throttle Position Sensors

TPS for MerCruiser MPI throttle bodies

Idle Air Control Valves

IAC valves for idle speed management

IAT / MAT Sensors

Intake air temperature sensors

Fuel Pressure Regulators

Rail-mounted and cooler-mounted regulators

Find Parts for Your Engine

Select your MerCruiser® engine family to browse compatible replacement parts.

MerCruiser®

7.4L MPI / 454

Big-block V8 · 7.4L / 454 CID · Multi-Port Injection

7 part categories available

MerCruiser®

502 MPI

Big-block V8 · 8.2L / 502 CID · Multi-Port Injection

Parts coming soon

MerCruiser®

6.2L MPI

Small-block V8 · 6.2L / 377 CID · Multi-Port Injection

Parts coming soon

MerCruiser®

5.7L MPI

Small-block V8 · 5.7L / 350 CID · Multi-Port Injection

Parts coming soon

MerCruiser®

8.1L MPI

Big-block V8 · 8.1L / 496 CID · Multi-Port Injection

Parts coming soon

Shop Popular Replacement Parts

Commonly replaced EFI and fuel-system components for MerCruiser® engines.

Fuel Injectors MAP Sensors TPS IAC Valves IAT Sensors Fuel Pressure Regulators O-Rings & Seals

DMP-FI-7400

MerCruiser 7.4L MPI Fuel Injector

Fits: MerCruiser 7.4L MPI / 454

Coming SoonContact for Price

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DMP-MAP-7400

MerCruiser 7.4L MAP Sensor

Fits: MerCruiser 7.4L MPI / 454

Coming SoonContact for Price

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DMP-TPS-7400

MerCruiser 7.4L TPS

Fits: MerCruiser 7.4L MPI / 454

Coming SoonContact for Price

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DMP-IAC-7400

MerCruiser 7.4L IAC Valve

Fits: MerCruiser 7.4L MPI / 454

Coming SoonContact for Price

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Why Discount Marine Parts Direct?

We exist to make quality aftermarket MerCruiser® parts accessible to the DIY marine owner.

Verified Fitment

Application-driven parts matching — not just engine size.

OEM Cross-Reference

Current & historical part identification across Mercury/MerCruiser® numbers.

Fast Shipping

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Expert Parts Support

Help when you're unsure. We know these engines.

DIY Marine Resources

Guides and diagnostics for the hands-on marine engine owner.

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Engine Service Guides

Coming Soon

Step-by-step service procedures for MerCruiser EFI systems.

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Fuel System Diagnostics

Coming Soon

Diagnose fuel injector, MAP sensor, and fuel pressure issues.

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Installation Tips

Coming Soon

Best practices for replacing EFI components on marine engines.

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