27
6.4 Ethanol-blended Fuel
Ethanol is an oxygenated hydrocarbon compound that has a high octane rating, therefore it is useful in
increasing the octane level of unleaded gasoline.
6.4.1 Additives
Phase separation occurs when water enters a tank that contains an ethanol / gasoline blended fuel. When
gasoline becomes saturated, a mixture of ethanol and water, known as phase separation, can form in the
tank, in the form of two layers: an upper ethanol-deficit gasoline layer and a lower ethanol-rich water layer.
This may cause knocking in an engine running on the gasoline layer, while the engine will not run at all on
the ethanol / water layer.
While it is impossible to absolutely guarantee avoidance of phase separation, there are a few preventative
steps that could help. Installing a 10-micron fuel / water separating filter in the fuel line between your fuel
tank and your outboard filters the gas and allows any water (which is heavier than gas) to safely sink to the
bottom of the filter and out of the fuel.
Adding a quality marine-specific non-alcohol-based fuel stabilizer and conditioner (like Yamalube
®
Fuel
Stabilizer & Conditioner PLUS) to each tank can also help. Before proceeding with any steps, please first
consult with an authorized servicer of your brand of outboard.
If phase separation does occur, your only remedy is to drain your fuel tanks, clean and dry the tank
completely and refill with fresh fuel.
6.5 Electrical System
The electrical system on your catamaran consists of three major components: the battery wiring system, the
component wiring system with circuit protection, and accessories. It is important that you understand the principles
of the electrical system, so that you can protect the components and troubleshoot any problems you experience.
6.6 Battery System
Your World Cat is equipped with three standard batteries. Two additional batteries are optional, depending
on accessories. Two of the batteries are Type 27 “cranking batteries”; the third is a Type 31 “house” battery.
The two cranking batteries each control one engine and provide the initial current to start the engines. The
house battery controls all other electrical components on the boat. The two optional batteries are Type 31
house batteries and control only those options.
To help maintain your batteries, a management system is installed on your boat, beneath the helm seat.
This system, controlled by a panel similar to the one shown below, enables you to engage or disengage
the batteries, distribute electrical current, and parallel batteries in the event of a failure. Chapter 10 of this
manual will provide details regarding the location and wiring of your batteries and management panel.
6.6.1 Battery Distribution
The distribution panel controls the flow of current from the batteries to the
engines and on-board functions through three main switches. Each switch is red
and labeled ‘Port Start’, ‘STBD Start’, and ‘House’.There are two yellow parallel
switches labeled ‘Emerg Parallel’.The house components are protected by an
80 amp breaker labeled ‘DC Main 1’. When leaving the boat, all switches should
be turned to the “OFF” position, while the DC Main breaker can remain on.
NOTICE
The use of improper gasoline or additives can damage your fuel system and is considered mis-use of
the system. Damage caused by improper gasoline or additives WILL NOT be covered under warranty.
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