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Gumout 5072866 Starting Fluid - starter fluid spray for gasoline engines and lawn mowers to inhibit corrosion and lubricate upper cylinders - Extreme weather, carb, air cleaner, or intake, 11 oz.

TLDR Review: Gumout Starting Fluid 11 oz.

By ShopSavvy Team

Published: September 1st, 2025

Pros

•Trusted brand with a long history of reliability.
•Excellent value for purchase.
•Effective for use with new carburetors, particularly on Briggs and Stratton gas push mowers.
•Highly praised quality and performance.
•Less flammable compared to competitors, particularly the Walmart store brand.
•Safe for both ycle and 4-cycle engines.
•Works effectively to clear flooded engines and start motors unused for months.
•Does not cause knocking noises, unlike some other starting fluids.

Cons

•Sprays with less force than anticipated, which might affect performance.
•Higher price point compared to similar options.

Bottom Line

Gumout 5072866 Starting Fluid is a reliable and effective option for starting gasoline engines, especially in adverse conditions. Its trusted brand and excellent performance make it a worthwhile investment despite a slightly higher price. It’s especially beneficial for clearing flooded engines and preventing knocking noises, making it ideal for both 2-cycle and 4-cycle engines.

Lowest at Amazon

$6.79 at Amazon

How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 1 retailers to give you the short version.

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