7.4L MPI / 454 — FUEL INJECTORS

Which Fuel Injector Fits My MerCruiser® 7.4L MPI / 454?

There is no single fuel injector for the MerCruiser® 454/7.4L family. Different engine variants and production ranges use different injectors. Use this guide to identify the correct injector for your specific engine before ordering.

Two MerCruiser® 454/7.4L engines of similar age may use different fuel injectors. Verify the engine model and serial range before ordering.

Fitment Notice: MerCruiser engines of similar displacement may use different fuel injectors depending on engine model, production year and serial range. Verify your OEM part number, engine application, serial number and relevant injector characteristics before ordering. Contact us before purchase if you are uncertain about compatibility.

7.4L / 454 — Select Your Injection Architecture

7.4L MPI / 454 MPI (this page)805225A1 / 861260T / 802632T — Multi-port injection 7.4LX TBI — Earlier EFI / TBI852956A1 — Earlier throttle-body injection (1996–1997)

Always Verify Before Ordering

Model year alone is not enough. Confirm all four of the following before selecting a replacement injector.

Exact engine model

Confirm the full engine model designation from your data plate — for example, 454 MAG EFI, 454 MAG MPI, 7.4L MPI (L29), 7.4L MPI MIE, or 7.4LX MPI. Similar names can indicate different injector families.

Engine serial number

Locate the serial number on your engine data plate. Serial ranges are the most reliable way to confirm which injector was factory-fitted to your specific engine.

Existing OEM or injector number

If you have the OEM part number from the original injector or a service manual, this is the most direct identification method. Cross-reference it against the table below.

Physical injector characteristics

Connector type, body length, O-ring configuration and any visible markings or colour bands can help confirm the injector family. Use physical characteristics together with OEM/serial verification, not as the sole method.

7.4L MPI / 454 Injector Selection Guide

The table below lists verified injector applications for the MerCruiser® 7.4L MPI / 454 family. Do not assume all 7.4L / 454 engines use the same injector — engine variant and serial range both matter.

805225A1 — Keihin/IPT861260T — Weber/Magneti Marelli IWP-069802632T / 25180245 — Rochester

Engine Variant	Years	Serial Range	OEM Injector	Manufacturer / ID	Visual ID	View Product
454 MAG EFI	1994–1996	0F115700–0F802349	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
454 MAG EFI Ski	1994–1996	0F215800–0F820099	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
454 MAG EFI Ski	1996–1997	0F820099–0K999999	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
454 MAG MPI	1996–1997	0F802350–0K147349	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
454 MAG MPI	1997–1998	0K147350–0L085399	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
454 MAG MPI Horizon MIE	1998	0L002200–0L086049	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
454 MAG MPI	1999–2001	0L085400–0M024999	861260T	Weber / Magneti Marelli — IWP-069	Yellow band	861260T Page
454 MAG MPI Horizon MIE	1999–2001	0L086050–0L674000	861260T	Weber / Magneti Marelli — IWP-069	Yellow band	861260T Page
7.4L MPI MIE	1995–1996	0F563052–0K147349	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
7.4L MPI MIE	1997	0K147350–0K999999	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
7.4L MPI (L29)	1998–2001	0L010003–0M024330	802632T / 25180245	Rochester — 25180245	Verification in progress	802632T Page
7.4L MPI MIE (L29)	1998–2001	0L010003–0L674613	802632T / 25180245	Rochester — 25180245	Verification in progress	802632T Page
7.4LX MPI	1996	0F602010–0K147349	805225A1	Keihin / IPT	Verification in progress	805225A1 Page
7.4LX MPI	1997	0K147350–0K999999	805225A1	Keihin / IPT	Verification in progress	805225A1 Page

Additional engine families using the 861260T (selected 350, 6.2L and 502 applications) are not listed here. This table covers verified 454/7.4L applications only.