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azrving's avatar
azrving
Explorer
Sep 05, 2014

Ethanol in small engines

I ran across this guys comments in a zero turn mower review and a guide to ethanol free stations

"David S Boyd Duffys Outdoor Power Equipment August 25, 2014

Gary, I am a Hustler dealer as well as a warranty center for Kawasaki engines. The problem that you are experiencing is not the Kawasaki engine or the Hustler mower. The problem is today’s gasoline with the Ethanol blend. TODAY’S engines are made to tighter tolerances for emissions and power. Like the cars of today, we are getting more power out of smaller engine sizes and as a result will act differently than the small engines of even 5 years ago. Ethanol is supposed to be at a max of 10% and the fuel cap on the Hustler states the same thing, but it has been our experience that the fuel companies has Ethanol up to 20%. Fuel that is left in a can for as little as 5 days will start to separate and the Ethanol will become concentrated. Ethanol has a lower boiling point, 173 degrees at sea level, and will cause vapor lock in a hot engine. Our suggestion is simple, use Ethanol free gasoline and your outdoor power equipment will last longer, run better and give you less headaches. Download the free app from pure-gas.org and you can find who is selling Ethanol free gas in your area."

Stations

56 Replies

  • My eu1000, my 2 stroke tiller, and my 4 stroke Honda outboard set for 4 months every year, not ever 1 problem. I believe its a mental thing. Go buy your eth free gas, its your money. But soon it will be outlawed, only then will you face the true reality.
  • mena661 wrote:
    No problem letting ethanol added gas sit in my MH's tank. Onboard generator fires right up everytime.


    Water is heavier than gas so is at the bottom of the tank. Generator pickups are often raised up to the quarter full level so you can't run the main tank dry using the generator.
  • No problem letting ethanol added gas sit in my MH's tank. Onboard generator fires right up everytime.
  • I deal a lot with small engine and ATV repair shops locally. The guys at the shops state they see lots of problems related to the ethanol gas. I am sure most is related to gas setting to long in the tank but who hasn't left there chainsaw or snow blower setting around for a few months with gas in the tank. I have had problems in a generator, ATV and chainsaw from ethanol gas.

    I just purchased a Toy Hauler with a 35 gallon gas tank which also fuels the on board genny, my first stop was the 10 miles out of the way gas station that has a ethanol free pump. I will continure to pay $.20 more a gallon for ethanol free fuel to fill the fuel tank as I don't know how long the gas will set in the tank and its cheaper then dealing with genny problems.
  • "Your average small horse power lawn mower engines will perform normally as long as the gas is not allowed to sit in storage for longer than a month."

    Bingo

    Some may want ethanol free stations. If you dont, just move on.
  • I would say that the guy quoted is covering a defect in the fuel delivery of Kawasaki engines and is incorrect about most things in that quote. Yes, ethanol added gasoline stores with more problems than a gasoline blended without but he is totally incorrect about blend rate, vapor locking, and engine build tolerances.

    This topic has been covered on this Forum and other places and there is a lot of misinformation about ethanol blended gas. The only tested and confirmed engine problems in the combustion of E-10, AFAIK, is in high power outboard marine engines. Your average small horse power lawn mower engines will perform normally as long as the gas is not allowed to sit in storage for longer than a month.

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