New rotax owner here!! Quick ethonal vs nonethonal questions

Discussion in 'Home Builders and Sport Pilots' started by Aaron H, Feb 21, 2019.

  1. Aaron H

    Aaron H Pre-takeoff checklist

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    Hi all,

    Picked up my first plane, an eagle ea 100.
    They only made a couple and went out of business.
    Also called an ibis magic 700 in columbia.

    I know the rotax doesn't like 100ll and nonethonal fuel is ideal.
    poh says auto fuel up to 10% ethonal is fine.

    I have access to non ethonal 91 octane at a gas station about .5 hr from the airport and the opposite way home from my house.

    If the aircraft is set up to handle ethonal, should I save the buck a gallon and time and just use the ethonal fuel?

    My other issue with the non ethonal fuel is that I don't know how often it's refilled, but the cashier said they go through alot of it and i know the octane degrades faster in the ethonal stuff.

    Any thoughts would be appreciated!
     
  2. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Touchdown! Greaser! PoA Supporter

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    I burn what I assume to be E-10 all the time. No problems.
    One potential issue would be things like the fuel tanks and fuel lines, but if the POH says E-10 is OK that's a good sign. But there have been some cases where composite fuel tanks have not turned out to be as ethanol resistant as the original manuf. thought they would be (Jabiru).
    I wouldn't go an hour out of my way to get ethanol free gas unless I had a specific worry about the tanks.
     
  3. Raymo

    Raymo Pre-takeoff checklist

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    Non-E has a much longer shelf life and won't clog your carb over time or hang onto water that may get into your fuel system. Vapor lock is also a greater concern.
     
    Last edited: Feb 25, 2019
  4. frfly172

    frfly172 Touchdown! Greaser! PoA Supporter

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    If your not flying often,the non E is a better choice,longer shelf life.
     
  5. JOhnH

    JOhnH Touchdown! Greaser! PoA Supporter

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    Ethanol. ;)
     
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  6. Bell206

    Bell206 Pattern Altitude

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    If you don't plan to fly a lot, take the ethanol challenge. Place a equal portion of ethanol gas and non-ethanol gas in separate mason jars. With lids off put on a shelf in a shed or someplace similar. Go back a week later and see which you prefer sitting in your airplane fuel tank.

    Another neat trick to determine if gasoline has ethanol in it, is to fill a mason jar half-full with the gas. Mark the gas level with a sharpie. Add some water at a 10 part fuel to 1 part water ratio. Shake not stir the jar. Let it settle out. Then see if the "gas" level is above the sharpie mark. With non-ethanol gasoline, the gas level will remain the same. With ethanol gas the "gas" level will be above the sharpie mark as some of the water will have combined with the ethanol in solution.

    If you use up the E10 in a months flight time you probably won't have a problem.
     
  7. Aaron H

    Aaron H Pre-takeoff checklist

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    Thanks all for the reply.

    If fuel line are safe for ethanol, would they still last longer with non ethanol fuel?

    Bell,
    What's the fuel look like after a week?
     
  8. C-1 PILOT

    C-1 PILOT Pre-takeoff checklist

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    Ive been using 91 octane, non ethanol fuel here in NY from a local Stewarts. Unfortunately, its not a dedicated pump, so I start out putting a few gallons or topping off my truck to purge any lower octane fuel from the pump, then fill my cans. Been doing this since July without a problem. My plane is and its 912 are new, so it has the seals that are supposedly enthanol compliant, however, as others have stated, why take a chance, if you can get non ethanol use it. It’s better in the long run, IMHO.
     
  9. Bell206

    Bell206 Pattern Altitude

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    The point is for you to see/learn using your fuel supply not mine. Anything short of that is only an opinion.
     
  10. Aaron H

    Aaron H Pre-takeoff checklist

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    Thx again fir the input.

    I will use non ethonal, even though it might non be ideal with my location.

    I bought an awesome gas can so at least fueling isn't hard. https://www.surecanusa.com
    Check it out, I put the can on the main spare, lower the nossle into tank, and press the button....presto!

    One more question.

    My egt is almost at reline for take off.
    Is this normal?
    Once I lower the nose, it's right in middle of green
     
  11. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Touchdown! Greaser! PoA Supporter

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    My ride often sits for a month or two. No big deal. (Other than the fact that I don't fly it nearly enough)

    If you have ethanol tolerant fuel lines, they will last for years - just like the ones in your car.
     
  12. James331

    James331 Touchdown! Greaser!

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    Leave the corn on the cobb.
     
  13. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Touchdown! Greaser! PoA Supporter

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    That would be the sensible thing. But...
     
  14. James331

    James331 Touchdown! Greaser!

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  15. Witmo

    Witmo Pattern Altitude

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    [QUOTE="Aaron H...

    One more question.

    My egt is almost at reline for take off.
    Is this normal?
    Once I lower the nose, it's right in middle of green[/QUOTE]
    The actual number for EGT is of little significance (unlike cylinder head temp). Egt relevance is when it peaks for leaning purposes. The number is highly variable due to lack of comformity with its exact placement in the exhaust stream from cylinder to cylinder. Many EGT gauges don't even have numeric markings.
     
  16. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    use anything that works in your snowmobile
     
  17. James331

    James331 Touchdown! Greaser!

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    Thought rotax was lawn mowers?
     
  18. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Touchdown! Greaser! PoA Supporter

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    No, snowmobiles and jetskis. It's Lycoming that makes sewing machine motors.
     
  19. Dav8or

    Dav8or Final Approach

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    Agreed. There is nothing wrong with using ethanol for fuel, but corn ethanol is really dumb. Switch Grass is the way to go.
     
  20. Dav8or

    Dav8or Final Approach

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    What cheesy journalism. :rolleyes:
     
  21. James331

    James331 Touchdown! Greaser!

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    Yet true.
     
  22. Aaron H

    Aaron H Pre-takeoff checklist

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    The actual number for EGT is of little significance (unlike cylinder head temp). Egt relevance is when it peaks for leaning purposes. The number is highly variable due to lack of comformity with its exact placement in the exhaust stream from cylinder to cylinder. Many EGT gauges don't even have numeric markings.[/QUOTE]

    Thx witmo,
    (Fyi, im a newer pilot) I just want to make sure I understand.
    Don't bother looking at egt for takeoff and pay more attention to cht.
    If cht is high then consider lowering the nose earler
     
  23. Palmpilot

    Palmpilot Touchdown! Greaser!

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    Last edited: Feb 25, 2019
  24. Kenny Phillips

    Kenny Phillips Pattern Altitude

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    I would think that for the small amount of water generally encountered it wouldn't be an issue (unless the fuel came pre-hydrated!) Saying that, the only emergency I ever had was when a bunch of melt water stopped the engine in the C-150 I was flying.
     
  25. Palmpilot

    Palmpilot Touchdown! Greaser!

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    I don't know why we were seeing so much water in the plane that I as flying. On one occasion, it was enough to prevent the engine starting.