27 Operator's Manual.. - Marlow-Hunter, LLC

Hunter 27 • Waste and Sanitation Systems
Note: The Overboard Discharge Valve should remain closed at
all times except when in use.
Basically, all pumps are somewhat associated with the
Waste / Sanitation system, but in this section we will
focus on the pumps that are directly associated with the
process of pumping waste overboard. The supply function
of these pumps are discussed in other sections.
Important: U.S. Coast Guard regulations require that boats
have a sanitation system on board to control pollution. Waste
is to be stored in a holding tank or other device so it can be
properly disposed of at a shore facility. Discharging this waste
overboard in U.S. lakes, rivers, bays, and sounds, and within
three miles of shore in international waters is prohibited. Check
with the Coast Guard regarding regulations in your area.
and the emergency bilge pump comes online, you will
hear a high water alarm from the helm along with a solid
red light. It would also be important to mention here that
when you hear the high water alarm (Fig. 10.3), it means
that high water exists in the bilges and it is time to take
action. Refer to the “Chapman’s Piloting, Seamanship
and Boat Handling.” We have supplied you with a copy
of this book aboard your new boat, but if you do not have
one, it is a wise idea to purchase this boating manual. It
is full of useful safety and navigational information.
Pump
Float Switch
10.2 Pumps
Probably the most important pump system on your boat
is the bilge pump system. Your boat is supplied with one
bilge pump and one (optional) high velocity emergency
bilge pump. All are part of the Gray water system. This
emergency bilge pump has the pumping capacity of 33
gallons a minute from your bilges. Your other bilge pumps
vary according to boat model and size, please refer to
the documentation for your bilge pumps for the pumping
capacities.
We are concerned about your safety. You should review
all information contained in this manual, as well as, the
manufacturer’s manuals concerning all systems on your
boat, but the bilge pump system will be one that is crucial
to learn. These pumps have the function of clearing water
from the bilges of your boat. You must ensure that they
are kept clean and functional in order for these pumps to
complete that task.
10.2.1 Emergency Bilge Pump (optional)
The emergency, or High Water Bilge pump, is generally
located in the center bilge compartment of your boat. It
is mounted higher than the standard bilge pump. This is
why it is referred to as a High Water Pump. We discussed
in the DC Electric section about the float switch and
the operation of the pump, so, you already understand
that the water level has to be above a high water level
to operate this pump. Fig. 10.2 gives you a look at the
emergency bilge pump aboard your boat.
Should the water level rise above the high water mark,
Check your Mechanical Arrangement illustration in the
Boating Safety Section for the location, and the Waste
/ Sanitation illustration at the end of this section, for the
discharge hose routing for this or any pump.
10.2.2 The Main Bilge Pump
This pump is located in the lowest parts of the bilge.
The function of this pump is to clear the water before it
reaches the high water level.
Careful maintenance should be made to these systems
to ensure they are always operational. Check the DC
Electric Section, or the Operation and Maintenance
subject of this section, to find the details about operation
of these pumps and the details of how to manually run
them.
10.3 Other Waste Related Equipment
10.3.1 Engine Exhaust
Fig.10.2
The subject here will be discussed in the Engine &
Transmission Section. The motivation for placing this
subject in the Sanitation System Section is due to the
10.3