Charging System Fusible Link; Replacing The Propeller - Mercury 300XS OptiMax User Manual

5. Make sure the battery is equipped with a non-conductive
shield to prevent accidental shorting of battery terminals.

Charging System Fusible Link

This model has a 100 ampere 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.

Replacing the Propeller

Avoid serious injury or death. Place the remote control in neutral
and remove the ignition key from the switch before removing and/
or installing the propeller. Place a block of wood between the
anti-ventilation plate and the propeller to protect hands from
propeller blades and to prevent the propeller from rotating when
removing the propeller nut.
MAINTENANCE
WARNING
!
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