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MerCruiser 350 MAG MPI / 5.7L MPI Engine Parts

MerCruiser

350 MAG / 5.7 MPI parts

350 MAG MPI / 5.7L MPI

Find parts for MerCruiser 350 MAG MPI and 5.7L multi-port-injected V8 engines. Identify the full sterndrive, inboard or tow-sport designation and engine serial number.

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Service & maintenance

Start your parts search

Collections are browsing aids and include parts for other engines. Confirm the complete model, serial number and exact assembly before ordering.

Engine maintenance collectionBrowse collectionEngine maintenanceBrowse Mercury and MerCruiser service and maintenance parts.Browse collection Cooling system collectionBrowse collectionCooling systemBrowse pumps and cooling components; match the exact assembly.Browse collection Fuel system collectionBrowse collectionFuel systemBrowse fuel-system components; confirm installed equipment.Browse collection

Browse by system

Find your service category

These broader collections help you browse. A category link does not confirm engine-specific compatibility.

MaintenanceBrowse the maintenance collectionBrowse category FiltersBrowse the filters collectionBrowse category FuelBrowse the fuel collectionBrowse category Ignition & electricalBrowse the ignition & electrical collectionBrowse category CoolingBrowse the cooling collectionBrowse category Belts & hosesBrowse the belts & hoses collectionBrowse category Gaskets & sealsBrowse the gaskets & seals collectionBrowse category Drive componentsBrowse the drive components collectionBrowse category

Before selecting parts

Identify the engine you have

Use the complete identification to select the correct generation, diagram and replacement part.

MPI & full designation

Keep 350 MAG MPI, 5.7 MPI and any Horizon, SeaCore, DTS or emissions suffix. Published ratings and installed equipment vary by package.

Fuel, ignition & exhaust

Match injectors, fuel module, ignition and catalyst or non-catalyst exhaust hardware to the exact serial-specific assembly.

Sterndrive or inboard

Sterndrive, inboard and tow-sport versions have distinct installation equipment. Identify the drive, transom or marine gear separately.

Carbureted 350 MAG, earlier throttle-body EFI versions and newer 6.2L engines are separate parts applications.

Send the complete engine-plate details and clear old-part photos. Match the installed fuel and cooling equipment, and include the separate drive or marine-gear plate when asking about those assemblies.

Mercury official parts catalogue Find your Mercury owner's manual

Documented installations

Boat examples

These examples describe documented engine options or installations. Boats may have been repowered or modified; an example does not establish present-day parts compatibility.

2005 Cobalt 220

The builder lists a 350 MAG MPI, 300 hp package with separately documented Alpha, Bravo I and Bravo III options.

Serial number help

Request a parts check

Send the Parts Desk the complete engine model and serial number, the OEM part number if known, and clear photos of the identification plate and old part. Include the installed fuel and cooling equipment when asking about those systems.

Include in your message

  • Complete engine model, suffix and serial number
  • OEM part number, if known
  • Identification-plate and old-part photos
  • Drive, transom or marine-gear identification for those parts

Parts Desk

Help before you order

Send your details through our contact page. The Parts Desk can help check the exact application before you select a replacement.

Ask the Parts Desk