ethenol gas

[Pas Bon]

Re: ethenol gas

FYI

Because of all the talk about bad gas and ethanol etc...

I just drained/siphoned about 35 gallons of gas outta my bayboat, it has been sitting under the carport for over 6 months and hasn't had any gas added to it in almost a year.


The gas looked and smelled fresh there was no, ZERO, none, not a drop of water in it. It was 10% ethanol gas and it is located in the humid environment of S Louisiana. I am running it (the drained gas) in my 95 t-100 with 220,000 miles

I have used stabil or seafoam either one or the other, sometimes both. So if this made the difference then great but I am sure that gas wasn't going bad anytime soon.

 

[j_martin]

Re: ethenol gas

2 problems with ethanol laced gas.
1. It's hard on past era rubber parts. Unfortunately some new rubber parts are still old formulas. That can/could be fixed.

2. Ethanol will lightly attach to the hydrocarbon fuel. It has a greater affinity for water. If some water gets introduced into the fuel, it will combine with the ethanol and separate from the hydrocarbon portion and go to the bottom of the tank. When that happens, 3 things happen.

a. The ethanol was used to improve octane among other things, so the remaining fuel has a lower octane.
b. The ethanol water mix don't burn for chit. A fuel water separator will fix this.
c. Something likes to live in the boundary area between the two liquids and form the stickiest snot you would have to deal with. Plugs up screens, filters, and even small jets easily.

For those reasons, alcohol laced fuel don't get anywhere near my boat. I run a RACOR separator because I sometimes get a little wild and get swamped over the fuel vent. The filter gets me home.

my .015
John

 

[ondarvr]

Re: ethenol gas

FYI

Because of all the talk about bad gas and ethanol etc...

I just drained/siphoned about 35 gallons of gas outta my bayboat, it has been sitting under the carport for over 6 months and hasn't had any gas added to it in almost a year.


The gas looked and smelled fresh there was no, ZERO, none, not a drop of water in it. It was 10% ethanol gas and it is located in the humid environment of S Louisiana. I am running it (the drained gas) in my 95 t-100 with 220,000 miles

I have used stabil or seafoam either one or the other, sometimes both. So if this made the difference then great but I am sure that gas wasn't going bad anytime soon.

The fuel stabilizers have no affect on water being absorbed into the fuel, they will keep it fresh longer though.

 

[rodbolt]

Re: ethenol gas

depending on the year and model of that yamaha thefiltercup could contain a 10 micron filter as well as a 10 micron filter between the fuel pump and VST.
dont trust that red ring to float if the ethanol brought in the watery goo.
odds are it wont.
seen it.
outboard and current marine water seperators simply cannot filter out all the water once its emulsified with alcohol and gasoline.
the gasoline hydrocarbons attache to the ethanol molecules which attach to water.
once the limit is reached the water and the alcohol fall out of solution and can somewhat be filtered.
couple that with the tendancy for that watery goo to turn acidic when sitting and you see fuel lines dissolve internally,fuel sender floats dissolve and even clear polypropalyne tanks dissove.
the carb guys get lucky cause the engine quits, the efi guys we usually change the powerhead while replacing the fuel system.
best I can tell you is treat the fuel and dispose of any fuel more than 4 months old for outboard use.