In response to a recent misleading piece in BoatUS, which warned of marine engine damage due to ethanol, Keith Holmes, President and Owner of CK Motorsports, a certified Mercury Marine Engine & Racing service dealer, wrote a response that we thought worth sharing with our readers.
The Truth Behind Marine Engines and Ethanol
by Keith Holmes, President & Owner of CK Motorsports
The gasoline used by more than 95 percent of Americans, E10, contains 10 percent ethanol and is safe to use in marine engines. All current boat engines are warrantied for E10 and have been for nearly two decades. Yet for some reason, BoatUS has chosen to ignore this information and the countless owner’s manuals expressly approving the use of E10. They are preying on people’s fears instead of looking at the facts.
Proper care and maintenance are the best and easiest ways to protect boat engines. While E10 is a safe, reliable fueling option for both marine engines and automobiles, higher ethanol blends, such as E15, are not approved for use in marine engines.
Furthermore, no consumer is required to fill up with an ethanol blend, but E10, E15 and other fuels do give consumers the sorely needed ability to choose a fuel that meets their price and performance needs.
As the owner of CK Motorsports, a premier certified Mercury Marine Engine & Racing service dealer that services 400-500 boats annually, and has for over 20 years in Nunica, Mich., I believe it is important to set the record straight when it comes to ethanol and marine engines.
Here are just a few facts and observations I have made over my 20 years servicing marine engines:Read More










