52
Fuel System
to prevent the tank from being overfilled and/or
fuel from being ejected from the fuel fill/vent fit
-
ting. You should never attempt to “top off” the
tank after the pump shutoff has activated. The
shutoff valves will not allow additional fuel to be
added after they close and could be damaged by
attempts to force additional fuel into the tank.
After fueling, close and latch the fill cap. Then
wash spilled fuel from the areas around the fuel
fill if necessary. Residual fuel left on the deck and
hull sides can be dangerous and will yellow the
fiberglass or damage the striping.
5.2 Outboard Engine Fuel System
The gasoline fuel system has one fuel tank. The
starboard engine is supplied by the starboard fuel
line and the port engine is supplied by the port
fuel line.
There is an on/off valve for each supply line
located on the fuel tank near each withdrawal
tube. The valves provide a means to turn off the
fuel supply to service the fuel system. The fuel
valves are accessed through an access plate in
the cockpit sole.
Fuel withdrawal lines are equipped with anti-
siphon valves where the lines attach to the fuel
tanks. These valves prevent gasoline from siphon-
ing out of the fuel tank should a line rupture.
WARNING
DO NOT REMOVE THE ANTI-SIPHON VALVES FROM THE
SYSTEM. SHOULD AN ANTI-SIPHON VALVE BECOME
CLOGGED, CLEAN AND REINSTALL OR REPLACE. IF A
FUEL LINE SHOULD LEAK, ANTI-SIPHON VALVES PREVENT
A SUBSTANTIAL AMOUNT OF FUEL FROM FLOWING INTO
THE BILGE. ANTI-SIPHON VALVES ARE REQUIRED TO BE
INSTALLED IN ALL BOATS EQUIPPED WITH GASOLINE
ENGINES BY THE U.S. COAST GUARD.
Yamaha Engine Fuel Filters
Engine Fuel Filters
On most engine installations, the fuel filter for
each engine is installed in the stern systems
compartment. The filters are accessed through
the hatch at the rear of the cockpit sole. The fuel
filters for Mercury Verado engines are mounted on
each engine. The filters are the water separator
type and should be serviced frequently to as-
sure an adequate supply of clean, dry fuel to the
engines. It is recommended that the filters are
inspected periodically and the elements changed
as needed.
There is a primer bulb in each fuel line located
near the rear of the hatch that is used to prime
the fuel system after service or as required. See
Fuel System Maintenance and the engine owner’s
manual for additional information regarding fuel
filters and the outboard engine fuel system.
Notice:
Clean fuel is especially important in fuel in-
jected engines. The engine manufacturer’s
recommendations for fuel filter maintenance
must be followed exactly.
Notice:
The procedure to prime the fuel system on
outboard engines is specific to the type
and model of engines on your boat. You
should refer to engine manufacturer owner’s
manual for the priming procedure for your
engines.
Summary of Contents for 340 DC
Page 1: ...OWNER S MANUAL 340 DC...
Page 2: ...2 Revision 0 11 07 2018...
Page 14: ...14 NOTES...
Page 22: ...22 NOTES...
Page 25: ...25 Operation...
Page 86: ...86 NOTES...
Page 102: ...102 NOTES...
Page 122: ...122 NOTES...
Page 130: ...130 NOTES...
Page 149: ...149 MAINTENANCE LOG Appendix B Hours Date Dealer Service Repairs...
Page 150: ...150 Maintenance Log Hours Date Dealer Service Repairs...
Page 151: ...151 Maintenance Log Hours Date Dealer Service Repairs...
Page 152: ...152 Maintenance Log Hours Date Dealer Service Repairs...
Page 153: ...153 Maintenance Log Hours Date Dealer Service Repairs...
Page 154: ...154 Maintenance Log Hours Date Dealer Service Repairs...
Page 155: ...155 Appendix C BOATING ACCIDENT REPORT...
Page 156: ...156 Boating Accident Report...
Page 157: ...157 Boating Accident Report...
Page 158: ...158 NOTES...
Page 160: ...160 NOTES...
Page 167: ...CAUSE AND SOLUTION...