10
HOW TO USE THIS MANUAL
This Marine Operator’s Manual covers the
LT4
6.2L Supercharged Direct Fuel Injection Marine
Engine. This manual is designed to help you get to know your engine and become familiar with
its various controls. This manual contains information to help you take care of your engine as well
as what services need to be performed to keep it in excellent running condition. The table of
contents will assist you in locating a specific subject.
Please contact a service dealer if you have reached a point of needing further instruction. Any
un-authorized work can void any potential warranties. We urge you to read this manual prior to
startup of the engine.
KEM Equipment, Inc. engines are built with a variety of standard and/or optional components to
suit a broad range of customer requirements. This manual
does not
identify equipment as
standard or optional. All the equipment described in this manual may or may not be found on
your engine. The description and specifications contained in this manual were in effect at the time
of publication.
SIDI FUEL INJECTION
SIDI stands for Spark Ignited Direct Injection. Direct injection moves the location of fuel entering
the combustion chamber closer to the point of ignition creating more combustion efficiency. This
causes a cleaner burn of fuel within the air fuel ratio mixture during the combustion cycle. The
results of this cleaner burn are lower exhaust port temperatures and a leaner mixture, meaning
considerably less fuel is required to produce the same horsepower as a conventional port fuel
injection system.