Malibu Boats 21 VLX, Owner'S Manual

Page: 259 / 309

Check the Engine Oil Level
With the engine OFF, remove the engine oil
dipstick from the top side of the engine.
With a clean, dry cloth, wipe the dipstick free
of residual oil and reinsert it into the engine.
Withdraw the dipstick and note where the
measurement reaches on the dipstick.
If the engine oil level is at or below the fill
line, add new oil as described in the Oil Change
information in this section of the Owner’s
Manual.
Never re-use oil or over-fill as either can
damage the engine, and it is not covered under
warranty. Use only the oil specified for your
installed engine.
Check the Battery Holders and the Connections
Because batteries contain fluid that is caustic and potentially
dangerous to skin and body parts, boat operators need to ensure that
the batteries are securely in place. Also, if the connections are loose,
erroneous readings may be sent to the boat system, which can cause
running and functionality problems. To avoid becoming stranded
during an outing, it is important to have accurate voltage readings
throughout the period of time the boat is in use.
To check the batteries, be sure the engine is OFF.
Locate the batteries. While they will be in different places depending
on the boat model, usually they are found under a bow seat. Check your
Quick Reference Guide in this Owner’s Manual to determine the location.
If the posts show signs of corrosion or other debris, remove the battery and clean carefully. To do so, follow
these steps:
Turn the engine OFF, as well as any systems that are operating on the boat.
Make sure the battery switch is in the OFF position.
Loosen and remove the negative (-) black terminal connection first. If you are using a wrench for this process, be
careful to avoid touching the positive (+) red terminal connection as you may receive an electrical shock as a result.
Next, loosen and remove the positive (+) red terminal connection.
Disconnect the hold-downs that are holding the battery in place.
Remove the battery.
Using a battery terminal cleaner, carefully clean the corrosion/debris from the battery posts.
Using a baking-soda-and-water mix, clean the battery case, taking care to avoid splashing any of the solution
inside the battery vents. Rinse with clear water, again, avoiding the vents.
Inside the battery is an electrolyte fluid that allows the chemical reaction to
provide power. The fluid is comprised of several components, one of which is
sulfuric acid. As with most acids, this is caustic and corrosive. If it comes in
contact with skin, immediately flush the area with copious amounts of fresh,
clean water. Follow up with medical assistance.
2020 Malibu Boats LLC • Owner’s Manual • Page 245