EARLIER EFI / TBI GENERATION

MerCruiser® EFI / TBI Replacement Parts

Replacement fuel-injection components for selected earlier MerCruiser® gasoline EFI and throttle-body injection applications.

Earlier MerCruiser® EFI/TBI systems use a different injector architecture from later MPI and ECM-555 engines. Engine displacement alone does not determine injector compatibility.

Verify your exact engine model, engine serial number, and existing OEM injector reference before ordering any fuel-system component.

350 / 5.7L — Select Your Generation

EFI / TBI Generation (this page)852956A1 — Earlier throttle-body injection 350 MPI / 5.7L Earlier MPI861260T / 12609192 — Later multi-port injection ECM-555 MPI Generation885176 / 879312003 — ECM-555 engine management

EFI / TBI Engine Families

Select your engine family to identify the correct injector kit. Verify your engine model and serial number before ordering.

4.3L EFI / 262 V6

4.3L EFI (GEN+) TBI — 852956A1 application

5.0L EFI / 305 V8

5.0L EFI — 852956A1 application

5.7L EFI / 350 V8

5.7L EFI — 852956A1 application. Separate from later 350 MPI architecture.

350 MAG EFI variants

350 MAG EFI Ski, Alpha EFI (GEN+) — verify engine model before ordering

Shop by Part

EFI/TBI fuel-system components. Verify compatibility before ordering.

Fuel Injectors

TBI injector kits for earlier EFI/TBI applications. Verify OEM number and serial range before ordering.

MAP Sensors

Manifold absolute pressure sensors. Sourcing in progress.

IAT Sensors

Intake air temperature sensors. Sourcing in progress.

TPS

Throttle position sensors. Sourcing in progress.

IAC Valves

Idle air control valves. Sourcing in progress.

Fuel Pressure Regulators

Fuel pressure regulators. Sourcing in progress.

Injector O-Rings & Seals

Injector service kits, O-rings, and seals. Sourcing in progress.

EFI / TBI Injector Kits

DMP-852956A1

MerCruiser® 852956A1 EFI / TBI Injector Kit

Selected EFI/TBI applications — verify OEM number and serial range

Sourcing in ProgressView Details

Have Your OEM Part Number?

Enter your existing Mercury Marine or MerCruiser OEM part number to find a verified replacement reference.

Servicing Your MerCruiser® EFI / TBI Engine

Earlier MerCruiser® EFI and throttle-body injection engines use a different fuel-injection architecture from later MPI and ECM-555 engines. Two engines of the same displacement may use different injectors depending on production period, engine variant, and injection system. Always cross-reference your engine serial number against OEM application data before replacing any fuel-system component.

Related Components

MAP sensors, IAT sensors, TPS, IAC valves, and fuel pressure regulators for EFI/TBI engines are being sourced and verified. Check back as the catalog expands.

Technical Resources

EFI / TBI Fuel Injector ID Guide 350 MPI / 5.7L Earlier MPI Architecture ECM-555 MPI Generation All Marine Fuel Injectors