Marquis 420 Sport Coupe Owner's Manual page 107

M
aintenance
Wear gloves when handling a propeller. Its blades are sharp.
Consider purchasing and carrying a spare set of props onboard your
yacht. Many marine dealers do not carry a full inventory of replacement
propellers. A spare set allows your vacation or cruise to continue in the
event that your yacht's primary set of props is damaged.
DC Electrical System
To maximize the useful life of the batteries:
Disconnect the batteries when performing maintenance tasks on the DC electrical
system. Failure to do so can lead to electrical shock.
Fresh Water System
3837 • U3 10/07
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ip roM
The majority of difficulties that occur with the 12-volt DC electrical system
are caused by poor battery maintenance. The factory-installed batteries
on your yacht should function normally for several years if properly
maintained. These heavy-duty batteries can be discharged and recharged
repeatedly without damaging them; however, completely discharging or
overcharging a battery can shorten its life span.
• While using the yacht, use the voltmeters to frequently monitor the voltage
level of each battery or battery bank. Monitor the charge level with the
engines turned off (static condition). Use the onboard battery charger or
the engine alternators to recharge the batteries when they are not fully
charged. Refer to Section 2 - Charging the Batteries for more information.
When the battery bank is fully charged, the voltmeter reads between 12.3
and 12.6 volts.
• Do not store batteries that are only partially charged. Recharge each
battery, if necessary. Check the voltage level every 30 days while the
battery is in storage and recharge it if the voltage reads below 12.3
volts.
Inspect the batteries once every month. Clean any corrosion that has
developed on the battery terminals. Spray a terminal protector on the
terminals and battery cable eye connectors. Make sure the battery cables
are securely fastened to the terminals. Tighten the nuts only slightly
beyond finger tight with a wrench.
Spray the connections for the bridge instruments and switches with an
electrical connection protector every six months.
Flush and sanitize the fresh water system at least once every season.
Flushing involves draining all water from the system. Sanitizing involves
using a commercially-made fresh water tank sanitizing liquid that is
available at many marine supply stores.
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