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Mercury MerCruiser 3.0 MPI User Manual

Mercury MerCruiser 3.0 MPI
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DRIVE SYSTEM AND ENGINE INSTALLATION SECTION - 6
Page 32 / 54 90-899883183 DECEMBER 2007
1. Route the instrumentation wiring harness back to the engine, avoiding hot spots or moving
parts. If an extension harness is required, secure the connection properly.
2. Fasten the harnesses to the boat at least every 46 cm (18 in.), using appropriate fasteners.
3. Connect the instrumentation wiring harness to the engine harness plug at the rear of the
engine.
4. Align 14 pin connector and twist locking ring to secure.
AUDIO WARNING SYSTEM CONNECTIONS, IF EQUIPPED
!
WARNING
Installing non‑potted electrical components in explosive environments can result in serious injury
or death from fire or explosion. Install all non‑potted electrical components such as warning
alarms away from environments where fuel or fuel vapor is present such as engine or fuel tank
compartments.
1. Install the audio warning alarm where the alarm:
Can be easily heard, yet is out of sight.
Can be easily accessed for installation and maintenance.
Rremains dry.
Is within length limits of the purple alarm wire that connects to the "I" terminal or 12 volt
source on the switched side of the ignition switch.
NOTE: The terminal to which the wire is attached must have no voltage when the ignition switch
is in the off position.
2. Place alarm in the desired location and secure to the wire bundle with the cable tie provided.
3. Connect the PPL wire from alarm to any PPL wire terminal on the instrument gauge or ignition
switch. Tighten the connection securely.
4. Connect the TAN/BLU wire from alarm to TAN/ BLU wire from instrument harness.
5. Place the small transparent decals on the bottom of the water temperature and the oil pressure
gauges.
6. Place the large decal on the instrument panel or other appropriate location in view of the
operator.
ALARM INDICATES LOW
OIL OR OVERHEATING
APPLY THE PROPER DECAL TO THE DASHBOARD
OR OTHER APPROPRIATE LOCATION:
AUDIO WARNING HORN WILL SOUND WHEN:
1. ENGINE OIL PRESSURE IS TOO LOW
2. ENGINE TEMP. IS TOO HIGH, OR
3. DRIVE OIL LEVEL IS TOO LOW
TO TEST AUDIO WARNING HORN:
TURN KEY TO "ON" POSITION (ENGINE OFF)
a
b
7799
a - Transparent decal b - Larger decal
7. Test the audio warning system during the Predelivery Preparation section.

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Mercury MerCruiser 3.0 MPI Specifications

General IconGeneral
BrandMercury
ModelMerCruiser 3.0 MPI
CategoryEngine
LanguageEnglish

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