This is the most complete service repair manual for the Mercruiser ECM 555 Diagnostics. This manual contains service, repair procedures, assmbling, disassembling, wiring diagrams and everything you need to know. Service Repair Manual Covers: 1 - General Information A - General Information 2 - Troubleshooting A - Troubleshooting 3 - Wiring Diagrams A - Wiring Diagrams–ECM with 10-Pin Harness B - Wiring Diagrams—ECM with 14-Pin Harness ================================================== High Quality PDF Manual, All Pages Are Printable. Instant Download No Shipping Cost No Need to Wait For A CD-ROM File Format: PDF Language: English Compatible: All Versions of Windows & Mac Requirements: Adobe PDF Reader Thanks for visiting!.