Chapter 3
Catalytic Converter
e catalytic converter is now required on modern engines. ese
catalytic converters sit at the top of the exhaust manifolds on either
side of the engine. ese boxes grow very warm and burn excess
hydrocarbons emitted by the engine, resulting in cleaner emissions.
ese converters require oxygen to fuel the burning process of these
hydrocarbons, and will o en times have an upstream oxygen sensor
that will adjust the fuel injection process to add more oxygen in the
fuel ratio. Bottom line these converters have been implemented to
provide cleaner emissions.
Typical Catalytic Converter Diagram
ENGINE FUEL SYSTEM
All engines require a source of fuel in order to run. e fuel that
an engine uses, is not only comprised of gasoline (in some cases
diesel), but also air. is mixture of gas and air are combined into
a ratio, best suited for your engine and boat. If this system fails, the
engine will have no fuel to compress and ignite. It is important to
make sure your fuel system is functioning properly.
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