This May Be In The Wrong Place,but

[garyw]

what year did outboards become ok to use ethanol?

can the older ones be retrofitted to use it?

thanks.

almost ready to buy, and don't want to get a surprise...

[Diamond City Fisher]

My 2007 Mercury outboard manual says it's ok to burn ethanol, but a Mercury dealer and repair shop owner down the street from me says to burn 92 octane...so I am still confused. I am taking the dealers advice and using 92 octane with Mercury brand booster and additives hoping that an ounce of prevention still works.

[nobutt56]

i always add ethanol treatment to any gas i put in my boats tank. i was also told to not use any octane above 87 when i bought my boat with a 150 merc...i have not violated that instruction. my motor is now nine years old and runs great. do these precautions make a diff. dont know? but will not change what works.....unless i hear reliable info diff..

[KC Bass Fanatic]

When most gas went to using some degree of ethanol in their products, I started asking around. My Evinrude mechanic told me to put ethanol treatment in every tank and use 87 octane. Been running flawlessly for years in my '96 Intruder.

[Topwater TRL]

I use the Sta-Bil for marine (colored blue instead of red) which stabilizes the gas and treats the ethanol in my 09 merc 225. I use it at every fill up. I've also been told by my merc mechanic to not use 90+ octane. 87 oct is just fine. The ethanol, just as in your car, does hurt your mpg. But we got to keep those Iowa corn growers in business

[garyw]

well, looks like 96 is the oldest so far. that helps. thanks.