MasterCraft NXT20 2023, Owner'S Manual

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/ 2023 OWNER’S MANUAL
To avoid damaging the engine’s electrical system, do not switch
off the battery switch while the engine is running.
If the batteries have no charge, bilge pumps will not operate in
manual or automatic mode. This may allow excessive amounts of
water into the hull, which can damage or sink the boat. When boats
are moored and exposed to the elements, frequently check the
battery charge and bilge function to make sure they work.
Troubleshooting
Because battery needs can vary substantially depending on a
number of factors (such as usage, location, and the number of
connected electrical components), MasterCraft does not place a
specific battery—or batteries—in the boat. The company strongly
encourages that you discuss battery options with your authorized
MasterCraft dealer prior to purchase.
If purchasing a new battery, note that all batteries must have 800
CCA (cold cranking amps). Any less may result in excessively fast
battery discharge; this can leave boaters stranded on the water.
To attain proper CCA and avoid potential battery malfunction,
MasterCraft recommends AGM spiral cell batteries.
DUAL BATTERIES
Models
Dual batteries are available on all
models except ProStar.
They are standard for X and XT and
optional for NXT. If the Advanced
Audio Package is selected for NXT,
dual batteries are mandatory.
Purpose
An additional battery helps the boat process heavier electrical
loads. This is important for late MasterCraft boats, which—due
to their high number of powerful features—can be electrically
demanding. The dual battery system allows the engine to crank
over with immediacy and support all onboard electrical loads.
Location
A single switch is used to operate the dual batteries. On the NXT
and XT, this switch is found under the dash. On the X and X Star,
it is found in the bow walkthrough. (Note: If a stern thruster is
equipped, there will be a second switch for the thruster battery.)
Battery locations vary by model. On X and XT20/21/25 models,
batteries are found in the observer storage. On NXT and XT23/24
models, they are under the aft port cushion.