Battery Installation - Electric Start Models; Battery Connections - Mercury 10/15 Sea Pro/Marathon - 6/8/9.9/10/15 HP User Manual

3. Fasten outboard by drilling two 7.9 mm (5/16 in.) holes through the
transom using transom clamp holes as a template. Fasten with two
bolts, flat washers and locknuts. The use of clamp handles alone is
insufficient to properly and safely secure the outboard to the transom.
Use a marine waterproofing sealer in holes and around bolts to make
the installation water tight.
a - Bolts (2)
b - Flat washer (2)

Battery Installation - Electric Start Models

MOUNTING BATTERY
Follow the battery manufacturer's instructions carefully. Mount battery in
the boat so it is secured against movement, preferably in a battery box.
Make sure battery is equipped with a nonconductive shield to prevent
accidental shorting of battery terminals.
NOTE: Electric starting outboards must have the battery cables connected
to a battery whenever the engine is running. Even if started manually, as
damage to the charging system could result.

Battery Connections

CONNECTING OUTBOARD BATTERY CABLES
1. First, connect the red battery cable to the (+) positive battery terminal
and then connect the black battery cable to the (-) negative battery
terminal.
INSTALLATION
a
31
c
b
3019
c - Locknut (2)