Mercury Dual Engine Trim Harness & Diode Assembly 812497T03

Mercury Harness and Diode Assembly 812497T03 is a genuine OEM component used in select dual-engine trim control installations. It helps prevent electrical feedback between the down-trim circuits of multiple engines.

This harness is specifically required when updating a dual-engine boat from Zero Effort control levers without trim switches to control levers with integrated trim switches.

Compatible Applications:

• Dual-engine Mercury installations
• Zero Effort control systems
• Upgrades from levers without trim switches to levers with trim switches

Specifications:

• Trim harness and diode assembly
• Helps prevent feedback between engine down-trim circuits
• Dual-engine applications only
• Mercury Part Number: 812497T03

Additional Part Required:

• Mercury Diode Kit 812497A4

Both components are required for the applicable dual-engine Zero Effort control conversion.

To Confirm Compatibility: Contact our team with your engine serial numbers and current control setup at (727) 596-5929 before ordering.

Replaces / supersedes Mercury part numbers: 812497A3.