MerCruiser® 879312003
ECM-555 Generation 2 fuel injector. Verified for MerCruiser® 5.0L MPI, 350 MAG MPI, MX 6.2L MPI, and 5.7L MPI families (serial 1A064825 and up).
ECM-555 Gen 2 (1A064825 and up). Gen 1 uses 885176 (0M300000–1A064824). Verify serial number to confirm generation.
View 879312003 Product Page879312003 applies to ECM-555 Gen 2 only (serial 1A064825 and up). Do not substitute for 885176 (Gen 1). Verify your serial number before ordering.
Verified Engine Applications
Application rows are derived from the verified Mercury/Quicksilver fitment matrix.
| Engine Model | Years | Serial Range | Status |
|---|---|---|---|
| MerCruiser® 350 MAG MPI ECM-555 — 350 V8 | 2007–2008 | 1A064825 and up | Verified |
| MerCruiser® 350 MAG MPI DTS ECM-555 — 350 V8 | 2007–2008 | 1A064825 and up | Verified |
| MerCruiser® 350 MAG MPI Horizon ECM-555 — 350 V8 | 2007 | 1A064825–1A299999 | Verified |
| MerCruiser® 350 MAG MPI Horizon MIE ECM-555 — 350 V8 | 2007 | 1A064825–1A089999 | Verified |
| MerCruiser® 350 MAG MPI MIE ECM-555 — 350 V8 | 2007 | 1A064825–1A089999 | Verified |
| MerCruiser® 5.7L MPI Horizon MIE ECM-555 — 350 V8 | 2008 | 1A090000 and up | Verified |
| MerCruiser® 5.7L MPI MIE ECM-555 — 350 V8 | 2008 | 1A090000 and up | Verified |
| MerCruiser® MX 6.2L MPI ECM-555 — 377 V8 | 2007 | 1A064825–1A299999 | Verified |
| MerCruiser® MX 6.2L MPI DTS ECM-555 — 377 V8 | 2007 | 1A064825–1A299999 | Verified |
| MerCruiser® MX 6.2L MPI Horizon ECM-555 — 377 V8 | 2007 | 1A064825–1A299999 | Verified |
| MerCruiser® MX 6.2L MPI Horizon MIE ECM-555 — 377 V8 | 2007–2008 | 1A064825 and up | Verified |
| MerCruiser® MX 6.2L MPI MIE ECM-555 — 377 V8 | 2007 | 1A064825–1A089999 | Verified |
| MerCruiser® MX 6.2L MPI MIE DTS ECM-555 — 377 V8 | 2007 | 1A064825–1A089999 | Verified |
| MerCruiser® 4.3L MPI ECM-555 — 262 V6 | 2007–2008 | 1A063240 and up | Verified |
| MerCruiser® 5.0L MPI ECM-555 — 305 V8 | 2007–2008 | 1A064825 and up | Verified |
| MerCruiser® 5.0L MPI DTS ECM-555 — 305 V8 | 2008 | 1A064825 and up | Verified |
Complete System — All Components
Components shown are derived from the verified fitment matrix for each engine row. DTS applications may have blank IAC / TPS fields — this is correct per Mercury documentation. Verify your exact engine model and serial number before ordering any component.
MerCruiser® 350 MAG MPI ECM-555 — 350 V8
2007–2008 · 1A064825 and up
MerCruiser® 350 MAG MPI DTS ECM-555 — 350 V8
2007–2008 · 1A064825 and up
MerCruiser® 350 MAG MPI Horizon ECM-555 — 350 V8
2007 · 1A064825–1A299999
MerCruiser® 350 MAG MPI Horizon MIE ECM-555 — 350 V8
2007 · 1A064825–1A089999
MerCruiser® 350 MAG MPI MIE ECM-555 — 350 V8
2007 · 1A064825–1A089999
MerCruiser® 5.7L MPI Horizon MIE ECM-555 — 350 V8
2008 · 1A090000 and up
MerCruiser® 5.7L MPI MIE ECM-555 — 350 V8
2008 · 1A090000 and up
MerCruiser® MX 6.2L MPI ECM-555 — 377 V8
2007 · 1A064825–1A299999
MerCruiser® MX 6.2L MPI DTS ECM-555 — 377 V8
2007 · 1A064825–1A299999
MerCruiser® MX 6.2L MPI Horizon ECM-555 — 377 V8
2007 · 1A064825–1A299999
MerCruiser® MX 6.2L MPI Horizon MIE ECM-555 — 377 V8
2007–2008 · 1A064825 and up
MerCruiser® MX 6.2L MPI MIE ECM-555 — 377 V8
2007 · 1A064825–1A089999
MerCruiser® MX 6.2L MPI MIE DTS ECM-555 — 377 V8
2007 · 1A064825–1A089999
MerCruiser® 4.3L MPI ECM-555 — 262 V6
2007–2008 · 1A063240 and up
MerCruiser® 5.0L MPI ECM-555 — 305 V8
2007–2008 · 1A064825 and up