What does ethanol do to small engines?

Discussion in 'Mechanic and Repair' started by exmarkking, Nov 2, 2013.

  1. DXN1EL

    DXN1EL LawnSite Senior Member
    from TEXAS
    Messages: 751

    As far as I know ethanol eats the rubber hoses, the problem can be fix with the cheap clear plastic hoses.
  2. Patriot Services

    Patriot Services LawnSite Fanatic
    Messages: 14,505

    Tygon hose (yellow green) is supposedly the most resistant fuel line available.
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    ericg likes this.
  3. exmarkking

    exmarkking LawnSite Bronze Member
    Messages: 1,012

    Where can you get it?
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  4. Patriot Services

    Patriot Services LawnSite Fanatic
    Messages: 14,505

    Most shops carry it or google small engine fuel line.
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    ericg likes this.
  5. Breezmeister

    Breezmeister LawnSite Bronze Member
    Male, from South Jersey
    Messages: 1,796

    You can get it online if you search for it, I believe that both Stens and Thomas both sell it. Just make sure that you get the one for gas.


    Attached Files:

    ericg likes this.
  6. XYZLawnPros

    XYZLawnPros LawnSite Senior Member
    Messages: 395

    We have a friend that tests the crap out of ethanol fuels.
    When you re-still 91 octane (which came out of the pump
    at a busy gas station and was found to be 17 ish % ethanol),
    and has only sat 3 weeks, you would sh!t yourself at the
    crazed black yellow slime varnish that is left over from all
    the additives and ethanol.
    Same test with 91 octane non-ethanol(unleaded gas) sitting
    for the same 3 week test, re-stilled got him no slime
    but just a tad yellow and very very faint varnish smell.

    I know what I'll be putting in all my engines.
  7. 04cubcadet3235

    04cubcadet3235 LawnSite Member
    Messages: 61

    They actually seem cleaner inside, most engines after year 2000 are all made to run on ethanol fuel. As long as its only 10% ethanol and the motor is after 2000, its fine. Some even as far back as 1995. There is a bunch of marketing crap given out by "ethanol treatment" manufactures though. One is that the ethonal holds water, its actually the gas that does. Don't believe everything they say about the ethanol fuel, the ethanol fuel treatment companies will say anything to get you to spend money and buy their product which is mostly alcohol. In some cases that fuel treatment alone can gum up the carb. Ive seen it happen...
  8. 04cubcadet3235

    04cubcadet3235 LawnSite Member
    Messages: 61

    Its the additive, not the ethanol. Try a test with an additive and non ethanol gas and see what you get, and ethanol gas alone with no additive. Also make sure it is only 10% ethanol for each test, not 17%.
  9. ZX12R

    ZX12R LawnSite Senior Member
    Messages: 795

    Interesting,this is why I feel addatives are a must(for me personally) if you plan on keep mowers and trucks for years with little to no sludge,varnish,valve train,and/or injector issues.

    Every mechanic that I have spoken to in this area speaks of ethanol and its negative effects.Maybe other parts of the country are different,I do not know,but around here,it is not good.
  10. Will P.C.

    Will P.C. LawnSite Senior Member
    Messages: 966

    Fueltesters and pure-gas have some great info on additives. They break down the main ingredients in each product. Sea Foam, Sta Bil, Starbrite, Lucas, etc and all of them contain some type of alcohol, harsh solvent or even ethanol.

    I used to be one of the guys that would put Stabil and Sea Foam into every gas can. I did not do any research and was being stupid. Gas companies spend millions in research and add their own additives to the fuel. If there was something so amazing on the market, the gas companies would already put it in the fuel.

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