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STARTING AND ELECTRICAL
Information and Check List – Installation using 14 pin connection
• Refer to Mercury Precision Parts and Accessories Guide or OEM Rigging and Accessories Guide
for part number information
1. Ensure that the 14 pin boat harness is the correct length to properly route from the boat dash
to the locking 14 pin electrical connector on the engine.
2. An analog gauge dash harness plugs into the 14 pin boat harness
3. A key switch assembly plugs into the 14 pin boat harness (both 3 position and 4 position
available)
4. Select a remote control assembly
•
•
•
5. A separate harness is required to connect the control or dash mounted power trim switch to
the power trim pump. (Do not use the connectors in the 14 pin boat harness labeled power
trim. This connection is for outboard only)
6. Up to 15 amps of accessory power can be supplied through the 14 pin wiring harness. An
accessory kit is available to provide accessory power up to 40 amps.
Battery
IMPORTANT: Follow all boating industry standards (NMMA, BIA, ABYC, etc.), federal standards,
and Coast Guard regulations when installing the battery. Install the battery an enclosed case and
properly insulate the positive battery terminal.
IMPORTANT: The engine electrical system is negative (‑) ground.
Follow these specifications when choosing a battery:
•
Use a 12 volt cranking battery for marine use.
•
Do not use deep‑cycle batteries as cranking batteries.
•
Use tapered post connectors or side terminal connectors.
•
Do not use wing nuts to connect battery terminals.
•
Tighten hex nuts to specification. See Power Harness.
•
Spray terminals with a battery connection sealant to retard corrosion.
•
Use a battery with a minimum capacity rating of 375 CCA, 475 MCA, or 90 Ah.
Battery Cables
NOTE: Battery should be located as close to engine as possible.
1. Select proper size positive (+) and negative (‑) battery cables using the chart.
a.
b.
IMPORTANT: Terminals must be soldered to cable ends to ensure good electrical contact. Use
electrical grade (resin flux) solder only. Do not use acid flux solder, as it may cause corrosion and
a subsequent failure.
Average cable length
Up to1.1 m (3‑1/2 ft)
1.1‑1.8 m (3‑1/2 ‑ 6 ft)
1.8‑2.3 m (6 ‑ 7‑1/2 ft)
2.3‑2.9 m (7‑1/2 ‑ 9‑1/2 ft)
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The remote control must be compatible with MerCruiser applications
A remote control may have a lanyard stop switch and will connect directly to the boat
harness, or a separate stop switch can be installed and connected to the boat harness
A power trim switch may be part of the remote control, or a separate dash mounted power
trim switch can be installed.
Add the positive and negative cable lengths together.
Divide by 2 to obtain the average cable length.
Cable gauge
25 mm 2 (4)
35 mm 2 (2)
50 mm 2 (1)
50 mm 2 (0)
90-899883183 DECEMBER 2007
SECTION - 7
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