Electrical Wiring Diagrams
The electrical schematics shown in Figures 2.1, 2.2, and
2.3 are typical illustrations and are provided to explain how
electric components on your boat are connected to the DC
power source. These schematics are for general reference
only and are not model specific.
See your dealer for all electrical system service work or to
add any electrical equipment to your boat. Do not attempt
to work on your boat’s electrical system. All electrical sys-
tem work should only be performed by a qualified marine
technician.
Fuel System (Figure 2.4)
The internal fuel system on board your Larson boat is
designed to meet or exceed federal requirements, at the
time of manufacture, of the U.S. Coast Guard.
The fuel system has been factory inspected and pres-
sure tested in accordance with regulations in effect at
time of manufacture. Additionally, each fuel tank must
pass rigid tests and inspections performed by the fuel
tank manufacturer.
Before you take delivery of your boat, check that your deal-
er completes a full inspection of the entire fuel system. You
should also inspect the entire system at least once a year.
1. Fuel Fill Plate – All Larson boats having an internal
fuel tank are equipped with a fuel fill plate and are
labeled GAS or DIESEL. Be sure to utilize the proper
grade fuel as specified in your engine owner's manual.
2. Fuel Vent – The internal fuel tank is vented over-
board or back to the fuel tank. While the tank is being
filled, the air is expelled by the fuel and escapes
through the fuel vent. When the fuel tank is almost
FULL, fuel will be ejected from the fuel vent.
3. Anti-Siphon Valve – Engine fuel pick up lines on I/O
boats are equipped with an anti-siphon valve where the
line attaches to the internal fuel tank. The valve pre-
vents gasoline from siphoning out of the fuel tank in the
event of a fuel line separation. (This does not apply to
O/B boats.)
4. Fuel Filter – The fuel filter supplied by engine manu-
facturers is installed on or near the engine. The filter
should be replaced frequently to maintain an adequate
supply of clean, uncontaminated fuel to the engine.
5. Fuel Tank – The internal fuel tank is accessible
through the engine compartment or below a removable
cover board and is equipped with a fuel vent line, fuel
fill line, sending unit, and engine fuel pickup as shown
in Figure 2.4.
Engine Exhaust System
The engine exhaust system removes harmful gas created
by the engine during combustion. Inspect the system for
leaks before each use of the boat. Make sure all hose
clamps and connections are tight and there are no cracks
in any exhaust system component that would allow carbon
monoxide gases to escape.
2.7
FUEL TANK
FILL
VENT
ENGINE
FUEL
PICKUP
SENDING UNIT
ANTI-SIPHON VALVE
NOTE: Fill and Vent and Sender location varies by model. See dealer for location.
FIGURE 2.4 – FUEL SYSTEM
Electrical Wiring Diagrams
The electrical schematics shown in Figures 2.1, 2.2, and
2.3 are typical illustrations and are provided to explain how
electric components on your boat are connected to the DC
power source. These schematics are for general reference
only and are not model specific.
See your dealer for all electrical system service work or to
add any electrical equipment to your boat. Do not attempt
to work on your boat’s electrical system. All electrical sys-
tem work should only be performed by a qualified marine
technician.
Fuel System (Figure 2.4)
The internal fuel system on board your Larson boat is
designed to meet or exceed federal requirements, at the
time of manufacture, of the U.S. Coast Guard.
The fuel system has been factory inspected and pres-
sure tested in accordance with regulations in effect at
time of manufacture. Additionally, each fuel tank must
pass rigid tests and inspections performed by the fuel
tank manufacturer.
Before you take delivery of your boat, check that your deal-
er completes a full inspection of the entire fuel system. Y ou
should also inspect the entire system at least once a year.
1.
Fuel Fill Plate
–
All Larson boats having an internal
fuel tank are equipped with a fuel fill plate and are
labeled GAS or DIESEL. Be sure to utilize the proper
grade fuel as specified in your engine owner's manual.
2.
Fuel Vent
–
The internal fuel tank is vented over-
board or back to the fuel tank. While the tank is being
filled, the air is expelled by the fuel and escapes
through the fuel vent. When the fuel tank is almost
FULL, fuel will be ejected from the fuel vent.
3.
Anti-Siphon Valve
–
Engine fuel pick up lines on I/O
boats are equipped with an anti-siphon valve where the
line attaches to the internal fuel tank. The valve pre-
vents gasoline from siphoning out of the fuel tank in the
event of a fuel line separation. (This does not apply to
O/B boats.)
4.
Fuel Filter
–
The fuel filter supplied by engine manu-
facturers is installed on or near the engine. The filter
should be replaced frequently to maintain an adequate
supply of clean, uncontaminated fuel to the engine.
5.
Fuel Tank
–
The internal fuel tank is accessible
through the engine compartment or below a removable
cover board and is equipped with a fuel vent line, fuel
fill line, sending unit, and engine fuel pickup as shown
in Figure 2.4.
Engine Exhaust System
The engine exhaust system removes harmful gas created
by the engine during combustion. Inspect the system for
leaks before each use of the boat. Make sure all hose
clamps and connections are tight and there are no cracks
in any exhaust system component that would allow carbon
monoxide gases to escape.
2.7
FUEL T
ANK
FILL
VENT
ENGINE
FUEL
PICKUP
SENDING UNIT
ANTI-SIPHON VAL
VE
NOTE: Fill and Vent and Sender location varies by model. See dealer for location.
FIGURE 2.4
–
FUEL SYSTEM