[PDF] Outboard Wire Colors - Composite Research, Inc. Outboard & Boat Engine Wiring Colors . Function. Yamaha: Honda. Suzuki: Johnson. Evinrude: Mercury. Battery Positive : Red . Red/Black : Red/Black . Red : White/Black ABYC Boat Wiring Color Codes - Electrical Supplies wwwneengine›CDI Electronics CatalogMarineEngine does not offer troubleshooting assistance or repair advice by email or by telephone. You are invited to join our public Boat Repair Forum to seek assistance from other members. You may also visit the Boat Motor Manuals section of our site to obtain a service manual.