is it regular gas that's making it run weird
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    is it regular gas that's making it run weird

    A couple of weeks ago, back when gas was affordable, I filled the ol Ferd up, and got some gas for the John Deere while I was at it. I've been running premium since I got it, but this time I put in regular and it's been giving me attitude ever since.

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Probably has some water in it. Have you checked your cans?
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    Haven't checked but they're rarely outside for very long

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    I've been running regular grade gas since '83 without any fuel related problems. This is "ethanol" fuel, but I also add Sta-Bil each time I fill my fuel can.

    You could have water in your fuel can, whether stored outdoors or indoors. Temperature changes create condensation on the inside of the can...fuel tanks also! The lesser the amount of fuel in the tank, the greater amount of condensation that can form.

    As far as regular or premium grade fuel, check your owners manual. Bob
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    Regular gas isn't going to burn as well as premium. Never mind the ethanol, think 87 octane vs 93 octane. I bought some non-ethanol 89octane once and didn't say anything. The boys could tell the difference in the machinery.
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    Quote Originally Posted by MDrew View Post
    Regular gas isn't going to burn as well as premium. Never mind the ethanol, think 87 octane vs 93 octane. I bought some non-ethanol 89octane once and didn't say anything. The boys could tell the difference in the machinery.
    very common misconception but its all about the fuel blend and the configuration of the engine burning it .....but lower octane by definition more explosive (volitile) than higher octane (less volitile) ......just a clarification
    Last edited by ttazzman; 07-16-2019 at 04:48 PM.
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    I don't run regular fuel in any of my small engines. It's premium only and I'll put Sta-bil, or Sea Foam, in as well. I agree that it could be condensation, or the scum left over from ethanol added fuel, or a combination of both. The cheapest and easiest solution is to put a full dose (enough for 5 gallons of gas) of Sea Foam in the tank and run it to see if it clears up. I've tried this a couple of times with small engines that have had ethanol fuel left in them for over a week or two, with great success. Then fill it with premium. Good Luck.
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    If your timing isnít just right then 87 can cause running issues. I think itís high octane allows slightly more timing advance then regular.

    My old turners was way overdue for a valve adjustment. If I ran regular it would misfire, it was fine with super.

    Should it effect running? No.

    Can it? Yes.
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    Quote Originally Posted by TOPHER5150 View Post
    A couple of weeks ago, back when gas was affordable, I filled the ol Ferd up, and got some gas for the John Deere while I was at it. I've been running premium since I got it, but this time I put in regular and it's been giving me attitude ever since.
    What model we talking about?

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    Its a John Deere 260 with a Kawasaki FC540V
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