Mercury Mercruiser PCM0905 8M0059347 | Professional ECM Repair Service

Send us your Mercury Mercruiser PCM0905 / 8M0059347 and we'll return it fully reconditioned, tested, and ready to install — no reprogramming needed. Save time and money compared to buying a new unit.

Manufacturer Part Numbers: PCM0905 · 8M0059347 · 8M0059365 · 78-8M0059365

Application

PCM0905 — Fits 2011–2016 MCM 4.3L MPI EC Alpha with standard cooling (s/n 1A648623–2A528897)

⚠️ We diagnose every unit upon arrival. If the unit is not repairable or no fault is found, a $200 diagnostic fee applies plus standard return shipping. We will refund the difference.

Warranty

Every repair is backed by a 1-year warranty. Our engineers ensure your ECM is rebuilt for reliability and long-lasting performance — not just a quick fix.

Common Problems We Fix

Boat does not shift into or out of gear
Blowing fuses
No communication with scan tool
Engine shutting down after two beeps
Fault codes stored in unit
Intermittent faults
Oil intrusion damage
Water or corrosion damage
Injector driver faults
Alarm stuck on
IAC problems
Fuel pump not working or staying on
Oil pump not working
Smartcraft communication issues
Broken pins
Water-in-fuel alarm

How It Works

Ship your ECM to our Florida facility
We diagnose and repair all faults
Unit is tested under simulation before shipping back
Reinstall — plug and play, no programming required

About the Mercury Mercruiser PCM0905 / 8M0059347

The Mercruiser 8M0059347 ECM is the main engine control module for the MCM 4.3L MPI EC Alpha platform. It manages engine speed, fuel injection, ignition timing, the charging system, and stores diagnostic codes for troubleshooting. A faulty ECM can cause no-start conditions, rough running, overheating, charging failures, or stored fault codes.