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Mercury 20 FourStroke - Battery Installation - Electric Start Models; Battery Connections

Mercury 20 FourStroke
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ENGINE INSTALLATION
121
5. Reinstall the access cover with two bolts. Tighten the bolts to
the specified torque.
32112
a
a - Access cover
Description Nm lb. in. lb. ft.
Access cover bolt 6 53
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
First, connect the red battery cable to the (+) positive battery
terminal and then connect the black battery cable to the (–)
negative battery terminal.

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