Section 5 - Propulsion; Fuel System - Marquis 690 Owner's Manual

P
roPulsion
Propulsion

Fuel System

Fuel Tanks
Over time, water can condense inside the fuel tanks, especially in areas with high
humidity. This water can then react with the fuel in the tanks to create a mixture that
can corrode the tanks from the inside.
6527 • V2 1/08
Your boat can be equipped with several types of inboard engine packages.
This section gives a general overview of your propulsion system and how
it works. For a detailed explanation of the engines installed in your boat,
Including how to operate and maintain them, refer to the OEM information.
Each diesel propulsion engine in your boat is plumbed to the fuel tank
located on the same side of the boat as the engine. The diesel propulsion
system uses fuel supply and return lines. The supply lines feed fuel to the
engine; the return lines transfer fuel not burned by the engine back to the
fuel tank. The generator draws fuel from the starboard fuel tank. When the
optional auxiliary fuel tank is present, the generator draws fuel from that
tank.
Your yacht has two standard fuel tanks that hold a combined maximum
1200 gallons of fuel. These fuel tanks are located on the starboard and port
sides of the engine room, outboard of the engines. There is also an
optional auxiliary fuel tank, located in the port bilge compartment, that
holds an additional 200 gallons of fuel.
The fuel system meets or exceeds the standards set by the U.S. Coast
Guard, the Boating Industry Association, and the American Boat and Yacht
Council that were in effect when your boat was constructed. Each fuel
tank has passed a rigorous test conducted by the tank manufacturer.
Additionally, the entire fuel system passed Marquis's own pressure testing
and inspection.
Before your boat is delivered, your Marquis Dealer also makes a full
inspection of the fuel system. An entry on the Marquis Pre-Delivery Service
Record verifies the dealer's completion of this inspection.
To avoid this:
• Use the fuel in the fuel tanks as often and as completely as
possible.
• Keep the tanks full of fuel when the boat is stored and when it
is used infrequently.
• Do not put alcohol-based fuels in the tanks.
• Check the fuel filter bowls for water accumulation prior to each
cruise.
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