MerCruiser® 8M0221731
MerCruiser® TPS for 7.4L L29, ECM-555 MPI, 8.1L MIE, and 496 Mag families. Historical OEM 853678T, current service number 8M0221731.
Mercury superseded 853678T to current service number 8M0221731.
View 8M0221731 TPS Page8M0221731 / 853678T applies to L29, ECM-555, 8.1L MIE, and 496 Mag mechanical-throttle variants. DTS applications have no conventional TPS — do not order for DTS engines. Verify engine model and 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® 7.4L MPI L29 — 454 V8 | 1998–2001 | 0L010003–0M024330 | Verified |
| MerCruiser® 7.4L MPI MIE L29 — 454 V8 | 1998–2001 | 0L010003–0L674613 | Verified |
| MerCruiser® 350 MAG MPI ECM-555 — 350 V8 | 2002–2007 | 0M300000–1A064824 | Verified |
| MerCruiser® 350 MAG MPI 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 | 2004–2007 | 0W060000–1A064824 | Verified |
| MerCruiser® MX 6.2L MPI Horizon ECM-555 — 377 V8 | 2002–2004 | 0M300000–0W059999 | Verified |
| MerCruiser® MX 6.2L MPI Horizon ECM-555 — 377 V8 | 2004–2007 | 0W060000–1A064824 | Verified |
| MerCruiser® MX 6.2L MPI Horizon MIE ECM-555 — 377 V8 | 2002–2004 | 0M300000–0M398394 | Verified |
| MerCruiser® MX 6.2L MPI Horizon MIE ECM-555 — 377 V8 | 2004–2007 | 0M398395–1A064824 | Verified |
| MerCruiser® MX 6.2L MPI MIE ECM-555 — 377 V8 | 2002–2004 | 0M300000–0M398394 | Verified |
| MerCruiser® MX 6.2L MPI MIE ECM-555 — 377 V8 | 2004–2007 | 0M398395–1A064824 | Verified |
| MerCruiser® MX 6.2L MPI Ski ECM-555 — 377 V8 | 2002–2007 | 0M317000–0W689999 | Verified |
| MerCruiser® MX 6.2L MPI 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® 8.1L MIE — 496 V8 | 2001–2004 | 0M026000–0W089999 | Verified |
| MerCruiser® 8.1L MIE — 496 V8 | 2004–2008 | 0W090000 and up | Verified |
| MerCruiser® 8.1L HO MIE — 496 V8 | 2001–2004 | 0M026000–0W089999 | Verified |
| MerCruiser® 8.1L HO MIE — 496 V8 | 2004–2008 | 0W090000 and up | Verified |
| MerCruiser® 496 Mag — 496 V8 | 2001–2004 | 0M025000–0W059999 | Verified |
| MerCruiser® 496 Mag — 496 V8 | 2004–2008 | 0W060000 and up | Verified |
| MerCruiser® 496 Mag HO — 496 V8 | 2001–2004 | 0M025000–0W059999 | Verified |
| MerCruiser® 496 Mag HO — 496 V8 | 2004–2008 | 0W060000 and up | Verified |
| MerCruiser® 4.3L MPI ECM-555 — 262 V6 | 2002–2007 | 0M300000–1A063239 | Verified |
| MerCruiser® 4.3L MPI ECM-555 — 262 V6 | 2007–2008 | 1A063240 and up | Verified |
| MerCruiser® 5.0L MPI ECM-555 — 305 V8 | 2002–2007 | 0M300000–1A064824 | Verified |
| MerCruiser® 5.0L MPI ECM-555 — 305 V8 | 2007–2008 | 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® 7.4L MPI L29 — 454 V8
1998–2001 · 0L010003–0M024330
MerCruiser® 7.4L MPI MIE L29 — 454 V8
1998–2001 · 0L010003–0L674613
MerCruiser® 350 MAG MPI ECM-555 — 350 V8
2002–2007 · 0M300000–1A064824
MerCruiser® 350 MAG MPI 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
2004–2007 · 0W060000–1A064824
MerCruiser® MX 6.2L MPI Horizon ECM-555 — 377 V8
2002–2004 · 0M300000–0W059999
MerCruiser® MX 6.2L MPI Horizon ECM-555 — 377 V8
2004–2007 · 0W060000–1A064824
MerCruiser® MX 6.2L MPI Horizon MIE ECM-555 — 377 V8
2002–2004 · 0M300000–0M398394
MerCruiser® MX 6.2L MPI Horizon MIE ECM-555 — 377 V8
2004–2007 · 0M398395–1A064824
MerCruiser® MX 6.2L MPI MIE ECM-555 — 377 V8
2002–2004 · 0M300000–0M398394
MerCruiser® MX 6.2L MPI MIE ECM-555 — 377 V8
2004–2007 · 0M398395–1A064824
MerCruiser® MX 6.2L MPI Ski ECM-555 — 377 V8
2002–2007 · 0M317000–0W689999
MerCruiser® MX 6.2L MPI 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® 8.1L MIE — 496 V8
2001–2004 · 0M026000–0W089999
MerCruiser® 8.1L MIE — 496 V8
2004–2008 · 0W090000 and up
MerCruiser® 8.1L HO MIE — 496 V8
2001–2004 · 0M026000–0W089999
MerCruiser® 8.1L HO MIE — 496 V8
2004–2008 · 0W090000 and up
MerCruiser® 496 Mag — 496 V8
2001–2004 · 0M025000–0W059999
MerCruiser® 496 Mag — 496 V8
2004–2008 · 0W060000 and up
MerCruiser® 496 Mag HO — 496 V8
2001–2004 · 0M025000–0W059999
MerCruiser® 496 Mag HO — 496 V8
2004–2008 · 0W060000 and up
MerCruiser® 4.3L MPI ECM-555 — 262 V6
2002–2007 · 0M300000–1A063239
MerCruiser® 4.3L MPI ECM-555 — 262 V6
2007–2008 · 1A063240 and up
MerCruiser® 5.0L MPI ECM-555 — 305 V8
2002–2007 · 0M300000–1A064824