1. Introduction
GM has been at the forefront of marine engine design for over 40 years, introducing new
technologies that have improved performance, fuel efficiency, emissions, and overall customer
satisfaction. Technologies like Variable Valve Timing (VVT), Active Fuel Management (AFM),
E85 FlexFuel capable, Returnless Fuel Injection, Electronic Throttle Control, Advanced Ignition
systems, Direct Injection (DI), and charged air systems have been introduced on our world-class
cars and trucks and could be considered for marine engine applications, as well.
Today, GM provides the most complete marine engine portfolio to all of the major marinizers in
North America, with a major share of the gasoline stern drive and inboard marine engine market.
The same engine that powers your GM truck or SUV is specialized to create the unparalleled
performance you can expect in a GM marine engine.
GM Powertrain has designed a number of important features into its marine engines, such as
corrosion-resistant alloys, engine oil sealing system, marine-specific camshaft designs for some
applications, and cooling systems that are compatible with both salt and fresh water
environments.
Because GM Powertrain knows the tremendous demand put on engines in the marine
environment, GM marine engines are "tested tough" by being run at extensive wide-open throttle
conditions, under load, when subject to the Marine GED Test Schedule (Global Engine
Durability).