Page 103 - REPOWER REFERENCE GUIDE (2020)

Engine Harness
MerCruiser Remote Control Only to the Harness Assembly (Control Harness Assembly)

a - Connection to control box
helm control
b - Connection to transom
a b harness
c - Connections to trim limit
switch

c

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a - Connection to control box
b - Connection to transom
b A B C C1 harness
c - Connections to trim limit
switch
RED GRN-WHT
DK BLU-WHT

GRN-WHT 3 4 PPL-WHT

RED 1 2 DK BLU-WHT

C2

a 1 1

T2 T1
c

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Transom Harnesses

• MPI engines will have a 16‑pin transom harness.
• Carbureted engines will only have a 4‑pin transom harness.
• MOST IMPORTANT: The sterndrive continuity ground has been incorporated into the new transom harness.
• The transom harness is secured to the back of the engine with a cable tie.
New Transom Harness Ground Connection

• The advantage of the new transom harness is to allow connection of various components (trim sender, MerCathode, some
SmartCraft sensors, and the transom ground) while the engine is not in place.
• When the engine is installed or removed, it is necessary to connect or disconnect only one connector in a more accessible
location.

90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 4D-23