The Biggest Problem With E10 Fuel And Lawnmowers

Hi and welcome to Micks Mowers
In this Video Using E10 fuel (which contains 10% ethanol and 90% gasoline) in a lawnmower can present several problems, especially if the equipment wasn't designed for ethanol-blended fuels.

Firstly, ethanol is hygroscopic, meaning it absorbs moisture from the air. In small engines like those in lawnmowers, this can lead to phase separation—where water and ethanol settle at the bottom of the fuel tank—causing starting issues, poor performance, or engine stalling. Over time, the moisture and ethanol mix can corrode metal parts, damage rubber seals, and degrade plastic components in the fuel system.

Secondly, ethanol burns hotter and cleaner than gasoline, which can affect engine temperature and increase wear if the mower isn't adjusted for it. Ethanol also deteriorates faster than pure gasoline, leading to stale fuel that gums up carburetors and fuel lines, especially in equipment that sits unused for long periods.

Manufacturers often recommend using fuel with no more than 10% ethanol, but even at this level, E10 can reduce engine life and reliability if proper storage and maintenance steps aren't followed. For best results, many users opt for ethanol-free fuel or add stabilizers to E10 when storing lawn equipment long-term.

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Disclaimer: My Videos are for information only- i am not a professional or repair shop im just someone in a shed enjoying a hobby- If you choose to try one of the suggestions made in my videos, you do so at your own risk. No information contained in this video shall create any express or implied warranty or guarantee of any kind. Any injury, damage or loss that may result from the improper use of tools, equipment or information contained in this video is the sole responsibility of the viewer and not Micks Mowers The Mower Man.THE SIGNS IN THE BACKGROUND ARE FOR DISPLAY PURPOSES ONLY.I HAVE NO AFFILIATION WITH THEM AND I CONFIRM I AM NOT A MAIN DEALER OF SAID COMPANIES I HAVE PERMISSION TO USE THEM