Mercury Smartcraft Fault Codes List -

Below is a curated list of frequently encountered codes. Always consult your engine’s specific service manual—codes vary slightly between outboard, sterndrive, and diesel models.

The Mercury SmartCraft system is a advanced engine management system used in Mercury Marine outboard engines. The system provides real-time data and diagnostics to help identify and troubleshoot engine issues. This report provides a comprehensive list of common Mercury SmartCraft fault codes, their descriptions, and possible causes. mercury smartcraft fault codes list

| Code | SPN | FMI | Description | |------|-----|-----|-------------| | 18-1 | 168 | 0 | System voltage – high (over 16V) | | 18-2 | 168 | 1 | System voltage – low (under 9V) | | 19-1 | 167 | 3 | Alternator output – no charge detected | | 21-1 | 167 | 4 | Stator / regulator – excessive AC ripple | Below is a curated list of frequently encountered codes

: The engine uses audible signals to alert you to issues even if you aren't looking at the gauge. A single beep typically means "all systems clear," while a continuous tone or a repeating series of beeps indicates a fault. The system provides real-time data and diagnostics to