Re: Found ethanol free gas...
My Mercruiser engine manual states "....it is recommended that ONLY alcohol-free gasoline be used where possible."
Unfortunately, in NY, our government has eliminated the possibility of obtaining alcohol-free gas.
Mercury changes their tune every now and then.
Mine (1997 Operation and Maintenance Manual) says:
The fuel systems components on your Mercruiser engine will withstand up to 10% alcohol content in the gasoline
Here's what Mercury says TODAY on their own website.
Are Mercury engines compatible with ethanol fuels?
The fuel-system components of Mercury engines will withstand up to 10 percent ethanol in gasoline - the maximum level currently allowed by the EPA in the U.S. There are some efforts to establish E-20 (20 percent ethanol mixed with 80 percent gasoline) for use in some areas, but that will require agreement from EPA to grant a waiver. Part of the EPA waiver process will require verification from studies that demonstrate that higher levels of ethanol do not create problems with fuel-system materials or operation of hardware. E-20 has not been extensively studied by Mercury and is not acceptable for use in Mercury products. E-85 fuels must not be used in any Mercury engines and could seriously damage current Mercury products. It is not legal in the U.S. to market any ethanol fuel as gasoline if it contains more than 10 percent ethanol.
So.
If you just run E10 as I have, (and not had any problems AT ALL) you probably won't have problems...........
Too many people have old boats with old engines that are not well maintained. All too often, a lot of people are way too quick to blame the fuel.
ymmv,
Rick