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2023 OWNER’S MANUAL
Battery electrolyte fluid is dangerous. It contains sulfuric acid,
which is poisonous, corrosive and caustic. If electrolyte fluid is
spilled or placed on any part of the human body, immediately flush
the area with large amounts of clean water and immediately seek
medical attention.
Use a battery terminal cleaning brush to remove corrosion from
the inside of the battery terminals. Clean the terminals with a
water-and- baking-soda solution and rinse with fresh water.
Check the battery box that normally holds the battery in place
to determine whether there is evidence of battery fluid inside it.
Battery fluids are corrosive and can cause permanent damage to
the battery box. If fluid is evident, wash out the box with the water-
and-baking-soda solution that is used to clean the terminals.
Rinse with fresh water and dry with a cloth.
Reconnect the positive terminal first, then the negative.
Tighten the terminals. Coat both terminals completely with a thin
covering of marine dielectric grease. Be sure that the rubber boot
covers the positive terminal completely.
NOTE: The boat’s engine is designed to work with the standard
electronics installed in the boat. Adding other electrical
components or accessories can change the way the fuel injection
controls the engine or the overall electrical system functions.
Before adding electrical equipment, consult an authorized
Inspect the Battery Connections
and Hold-Downs
Because poor connections
or hold-downs may result in
erroneous voltmeter readings,
MasterCraft recommends
doing this before starting
the boat
1. Ensure the engine is OFF and the engine safety starting switch
disconnected. Be certain that the throttle/shift control lever is
in neutral. Locate the battery. Batteries are placed in a variety of
locations, depending on the model. Check under the observer seat
or behind the rear seat.
2. Check that the battery post connections are clean and tight. If not,
loosen and remove the negative terminal connection first.
Be careful not to touch the positive terminal with the wrench.
Loosen and remove the positive terminal connection. Remove
battery hold-downs and remove the battery from the boat. Clean
corrosion from the battery posts with a battery terminal cleaner.
Clean the battery with a water-and-baking-soda solution. Use care
to avoid allowing the solution to enter the battery vents. Rinse the
battery with fresh water.
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