Winterizing Rules for Ethanol

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[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]The debate began innocently enough. Pierce Hoover, editor of Motor Boating, asked my opinion on winterizing procedures with ethanol-extended gasoline a fuel much more susceptible to deterioration during storage. [/FONT]

[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]Simple, right? Stabilize the fuel, top off the tank, run it through the fuel system, fog the cylinders, change the oil and coolant (on a closed-cooled engine) and cross your fingers until spring. [/FONT]

[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]To stir things up Pierce also asked Kevin Falvey, our senior technical editor, his advice. Kevin's procedure was markedly different. He runs the tank close to empty before storage. In the friendly wrestling match that ensued, Kevin sent me the Mercruiser maintenance manual straight from the shoulder. It supported his position of running the tank low for storage so that, if the gas is contaminated by condensation, there is less fuel to dispose of. And moisture contamination is always a risk as long as fuel tanks are open to the atmosphere. [/FONT]

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[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]So I fired off an e-mail to Evinrude, Yamaha and the makers of two popular fuel stabilizers, Sta-bil and Star brite Star-Tron. [/FONT]

[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]Yamaha's official position is to stabilize the fuel, said Martin Peters, spokesman for the company. [We] recommend our Fuel Stabilizer & Conditioner to be run through the entire fuel system, and then store the tank seven-eighths full to leave room for expansion of fuel from ambient temperatures.[/FONT]

[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]But Star brite and Sta-bil advise we go for full. In many places the local fire marshal requires full tanks because it minimizes the formation of volatile fumes in the tank and lowers risk of fire, said Star brite vice president Bill Lindsey. He cited statements made by Fort Lauderdale, Florida, area marshals. [/FONT]

[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]OK, so Evinrude can settle this question, can't it? Yeah, right. [/FONT]

[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]It's a debate that will never be settled, said Larry Koschak, Evinrude's product manager. The different regions and regulations do not allow a pat answer. Cold environments slow the deterioration process, while hotter climates accelerate the deterioration of fuel. Some storage facilities do not want full fuel tanks. For me, I store whatever fuel is left in the tank. This year it was one-half tank 12 gallons. I fill the tank before our first outing, so I have fresh fuel as much as the tank will allow. [/FONT][FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]I guess that settles it. Or not. [/FONT]

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[FONT=Trebuchet MS, Lucida Grande, Arial, sans-serif]Article courtesy of Boating Magazine. To subscribe or view additional news from Boating Magazine, go to (www.boatingmag.com)[/FONT]