J/Boats J/109 Owner's Manual - Electrical System
J/109 OWNER GUIDE
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Bilge Pumps There is one electrical and one manual bilge pump installed on the J/109. Two
pump intakes are located in the keel sump under the main cabin floorboard.
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The Manual pump is operated from the cockpit.
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Electrical Bilge Pump is wired to an independent switch on it’s own panel adjacent to the nav station.
Head System
The J/109 is equipped with one certified marine head which is capable of discharging effluents into a
holding tank or overboard. Both systems are easy to operate and with correct usage and proper
maintenance, will provide many years of use.
Before operating the HEAD, ensure you have read its manual thoroughly and understand the proper
procedures. Silly mistakes can cause severe “head” aches at the worst possible time!. And a word to
the wise
PLEASE TRAIN YOUR GUESTS ON HEAD OPERATION. NEVER, NEVER ASSUME THEY KNOW
HOW TO USE IT.
The head is a large pump which takes in seawater and flushes waste into the holding tank or
overboard. The salt-water intake thru-hull is underneath the head sink and the discharge is in the
starboard aft locker. Remember open/closed positions on these thru-hulls. It is good seamanship to
close the intake and discharge seacock for the head when not in use.
When seawater and effluent are pumped through the head, they’re pumped into the holding tank by
the action of pumping the toilet handle. The waste discharge fitting on deck is provided so a shoreside
pump-out station can empty the tank. Care should be taken not to overfill the holding tank as effluent
can block the vent hose and may damage the tank... or worse, burst the hose. If the toilet is difficult to
pump, check to see if the holding tank is overfilled. “When in doubt, pump it out!”
The holding tank must be pumped out before winter storage. Dumping a quart of anti-freeze through
the heads will prevent the seals and equipment from cracking. The following hoses are connected to
the tank.
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Waste Discharge Hose from the head
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Pump-out Hose leading to the deck fitting
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Vent Hose to vent the tank overboard.
Electrical System
The following section describes the electrical systems aboard the boat, how they operate, where they
lead, and how to avoid trouble. Please read this section over more than once. For wiring code
information please refer to the color code diagram.
DC Electrical System
A 12 Volt DC electrical system is used throughout the J/109 for lighting and operation of pumps and
various accessories. The J/109 is standard with two 105 Amp Glass Mat batteries located under the
starboard settee berth. An optional 105 amp AGM is available.
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Electrical Panel: controls electric distribution with circuit breakers and switches. The main
wiring harness runs from the back of this panel.