Battery Inspection; Charging System Fusible Link - Mercury 300 XS OptiMax Manual

Description
Spark plug

Battery Inspection

The battery should be inspected at periodic intervals to ensure proper engine
starting capability.
IMPORTANT: Read the safety and maintenance instructions which accompany
your battery.
1. Turn off the engine before servicing the battery.
2. Ensure the battery is secure against movement.
3. Battery cable terminals should be clean, tight, and correctly installed.
Positive to positive and negative to negative.
4. Ensure the battery is equipped with a nonconductive shield to prevent
accidental shorting of battery terminals.

Charging System Fusible Link

This model has a 100 amp fusible link between the alternator and the +12 volt
stud. This fusible link protects the alternator from damage due to accidental
reverse battery connection. If the battery cables are reversed, the fusible link
creates an open circuit, protecting the alternator. With the fusible link open, the
engine can be started; however, the run time is limited, because the alternator
is not charging the boat battery. If the fusible link circuit becomes open, contact
your authorized Mercury Marine dealer.
eng
MAINTENANCE
79
Nm lb‑in.
27 –
lb‑ft
20
3797