Mainship 40 Trawler Single, Operator'S Manual

Page: 57 / 170

Fuel Systems
The fuel systems aboard your Mainship yacht consists of
the following components or sub-systems.
Fuel Tanks
Fuel Fills
Fuel Vents
Fuel
Lines, Crossover Lines, and Valves
Fuel Water Seperators (Fuel Filters)
5.1 Fuel Tank
Your boat is equipped with 2 fuel tanks, having a total
capacity of 300 gallons. The fuel tanks are located port
and stbd outboard of the engine in the engine compart-
ment.
The fuel tanks are equipped with a fuel level sending
unit; which provides an electrical signal to the fuel gauge
located at the helm, to indicate the fuel level.
The tank is filled through two fuel fills (5.2.1), on each
side of the boat.
The fuel tanks should be inspected for signs of leaks,
corrosion, and/or pitting at least once a year. Corrosion
normally appears as a white, chalky, or flaky substance
on the surface of the tank. Sometimes, it also appears
as pitting or small pockets of missing aluminum. Another
indication of corrosion is bubbles on the paint that coats
the tank. If any of these conditions are present, have an
authorized service technician inspect the tank immedi-
ately. If a leak is found, turn off battery switches and dis-
connect shore power (See Connecting & Disconnecting
Shore Power, AC Electrical System), which explains
the proper way to disconnect and disable any possible
source of ignition). Contact your dealer or Customer
Service immediately.
The engine room blower is installed to assist you in
removing heat and fuel vapors from your engine room
area. Check the DC Electrical system, and the Engines
and Transmissions chapters for more information about
the blower.
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Figure 5.1
5.1.1 Fuel Tank Grounding System
The fuel tanks and fuel fills on your boat are electrically
grounded (or bonded) to the ground buss bar of the bond-
ing system (see the DC Electrical chapter). This ground-
ing system is designed to prevent the discharge of static
electricity when fueling your boat. An authorized service
technician should inspect this system at least once each
year.
5.1.2 Fuel Gauge
The purpose of the fuel gauge (Fig. 5.1) is to allow you
to constantly monitor the fuel level in the fuel tanks. Your
boat has a fuel gauge on the helm.
DANGER
! !
Never enter the engine room without proper ventila-
tion first. A spark caused by power tools or lighting
equipment could result in fire or explosion which
could cause personal injury or death.
WARNING
! !
Fuel leaking from any part of the fuel system can
lead to fire and explosion that can cause serious
bodily injury or death. Inspect system before
fueling.
CAUTION
! !
Using the wrong type of fuel will result in severe
damage to the engines. Refer to your owner’s
manual for fuel recommendations.
Mainship 40 Trawler Single & Twin • Fuel System
5.3