Mercury 8.1S Horizon, Product Applications Manual

Page: 127 / 163

Electrical System
Page 8A-8 90-863758060 AUGUST 2006
Electrical Connections
!
CAUTION
Avoid damage to the electrical system components caused by improper work or
diagnostic practices. Observe the following precautions when working on or around an
electrical harness, or when adding electrical accessories:
•
Do not tap electrical accessories into the engine electrical harness.
• Do not puncture (probe) wires for testing.
• Do not reverse battery leads.
• Do not splice wires into the electrical harness.
• Do not attempt diagnostics without proper, approved service tools.
IMPORTANT: When routing all wire harnesses and hoses, ensure that they are routed and
secured to avoid coming in contact with hot spots on engine and to avoid contact with
moving parts.
Tube Ref No. Description Where Used Part No.
25
Liquid Neoprene All electrical connections 92-25711-3
SmartCraft Product
A Mercury SmartCraft System instrument package can be purchased for this product. A
few of the functions the instrument package will display are engine RPM, coolant
temperature, water pressure, battery voltage, fuel consumption, and engine operating
hours.
The SmartCraft Instrument package will also aid in Engine Guardian diagnostics. The
SmartCraft Instrument package will display critical engine alarm data and potential
problems.
Refer to the
Mercury SmartCraft Operator's Supplement (90-10229023) for the warning
functions monitored and basic operation of the SmartCraft Instrument package. Refer to
the instructions included with the instruments for installation instructions.
Engine Harness
GENERAL INFORMATION
• Fuel injected MerCruiser engine models are "SmartCraft" ready and may be rigged
using the SmartCraft instrumentation, analog instrumentation, or a combination of both.
• The SmartCraft data is carried in the 14-pin system without the use of a special data
harness.
• Adapters have been made to adapt a 14-pin connector engine to a 10-pin connector
boat and from a 14-pin boat to a 10-pin engine.
• If an adapter is used the accessory current through the boat harness is limited to 15
amps even if the boat has a 10-pin harness that in the past has been capable of
handling larger accessory loads.
• SmartCraft data is not supported across the adapters so a separate CAN line will be
needed on a boat using SmartCraft instrumentation and an adapter harness.