Mercury EFI Outboard & Mercruiser
ECM555-48
ECU REPAIR
Repair and testing for 48-pin ECM555 ECUs. Mercury 3/4 cylinder EFI outboards and Mercruiser inboards. Worldwide mail-in. 1-year warranty.
Service Pricing
Diagnose & Test
$145
Repair with 1-Year Warranty
$845
If processor needs replacing: +$500
Test fee waived when repair is purchased.
Compatible Part Numbers
ECM5550202 · ECM5550204
ECM0401 · ECM0402 · ECM0501
ECM0701 · ECM0702 · ECM0704
ECM0708 · ECM0718
Problems We Repair
- Coils or injectors not working
- Alarm stuck on
- IAC not working
- ECU not responding
- Water damage
- Fuel pump issues
- Oil pump not working
- SmartCraft not working
- 2 beeps and engine shutoff
- Water in fuel alarm
- Broken pin
- Lightning strike (+$500)
Engines We Service
- Mercury 3 Cyl EFI 30, 40hp
- Mercury 4 Cyl EFI 40, 50, 60hp
- 4.3L MPI Mercruiser
- 5.0L MPI Mercruiser
- 5.7 MPI Mag / Scorpion
- 6.2 MPI Mercruiser