STA-BIL Fast Fix Small Engine Treatment, 4 oz

Name: STA-BIL Fast Fix Small Engine Treatment, 4 oz
Brand: STA-BIL
Rating: 4.6 (6909 reviews)

Fast Fix is the bottle you reach for after the third pull does nothing, or the mower runs like it is chewing gravel. It is a cleanup dose for carbs and injectors gummed by old fuel.

The four-ounce size is one rescue: pour it into a fresh tank, let the engine run it through, and give the machine a chance to clear its own throat before anybody reaches for a wrench.

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When the third pull does nothing at all.

The rescue dose

Concentrated cleaning aimed at varnish and gum from fuel that sat too long.

Wrench-free first aid

The treatment runs through the engine — no teardown, no carb kit, no afternoon lost.

Small-engine proportioned

Dosed for mower, blower, trimmer and snowblower tanks.

Proof in one tank

By the end of the treated tank you know whether the fix is chemistry or hardware.

From the label

Fixes rough running and hard-to-start engines: Breaks down gum and varnish that cause rough running, hard starts, sputtering, and no-start issues in small engines, helping restore performance quickly
Cleans carburetors and fuel system: Works through the fuel system to clean carburetors, fuel injectors, and internal components, functioning as a small engine carb cleaner without requiring disassembly
Removes water and combats ethanol fuel effects: Helps eliminate water in the fuel system and combats the effects of ethanol-blended fuels, including E15, which can contribute to rough running, stalling, and starting issues
Designed for lawn mowers and small engine equipment: Ideal for use in lawn mowers, trimmers, chainsaws, snow blowers, generators, and other 2-cycle and 4-cycle engines
Easy-to-use fuel treatment: Add to fresh gas and run the engine to circulate through the system, treating up to 10 gallons and helping restore smooth operation in small engines affected by fuel-related issues