GASOLINE ENGINES BRAVO MODELS
Page 24 of 116
EFI Electrical System Precautions
NOTE: All references to EFI models apply to all EFI and MPI engines.
CAUTION
Avoid damage to the EFI electrical system components: Refer to the following pre-
cautions when working on or around the EFI electrical harness, or when adding oth-
er electrical accessories:
• DO NOT tap accessories into engine harness.
• DO NOT puncture wires for testing (Probing).
• DO NOT reverse battery leads.
• DO NOT splice wires into harness.
• DO NOT attempt diagnostics without proper, approved Service Tools.
Instrumentation
We recommend the use of Quicksilver Instrumentation and Wiring Harnesses which have
been specifically designed for compatibility with our engines, and to the same high quality
and performance standards. Refer to Mercury Precision Parts / Quicksilver Accessories
Guide for selection.
Refer to Instrumentation Wiring Diagrams for specific wiring diagrams.
GAUGES
ABYC standards recommend a group of four gauges.
The basic four gauges that must be used with the engine are:
1. Tachometer
2. Oil Pressure
3. Water Temperature
4. Voltmeter
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