Sta-bil 22303 Small Engine Fuel System Cleaner 4 Oz

Product Description

The STA-BIL 22303 is a small engine fuel system treatment formulated to dissolve gum and varnish deposits that cause rough starts or prevent engines from starting. It works throughout the entire fuel system, from the tank through the carburetor or fuel injectors, targeting deposits left behind by ethanol-blended fuels and old gasoline. The 4 oz bottle treats up to 10 gallons of gasoline. This additive is intended for service technicians, equipment operators, and knowledgeable DIYers who need a fast, non-disassembly solution for fuel system fouling in small gasoline-powered equipment.

This treatment is designed for use in all gasoline-powered small engine equipment, including lawn mowers, generators, trimmers, pressure washers, and similar units. It is especially useful during seasonal startup when fuel has been sitting and deposits have formed in the carburetor or fuel lines. The formula is compatible with ethanol-blended gasoline and does not require draining the tank or removing any components before application.

Key Features

• Dissolves gum and varnish deposits throughout the fuel system
• Compatible with all gasoline small engine equipment and ethanol-blended fuels
• Treats up to 10 gallons of gasoline per 4 oz bottle
• Works from the fuel tank through the carburetor or fuel injectors
• No engine disassembly required — pour directly into the fuel tank

Compatibility

Designed for use with all gasoline-powered small engine equipment where fuel system cleaning or gum and varnish removal is needed.

Installation Notes

This product is applied directly to the fuel tank by service technicians or equipment operators — no specialized tools or disassembly required. Ensure the engine is off before opening the fuel cap and adding the treatment. Follow all local regulations regarding fuel handling and disposal of treated fuel if draining is necessary. This product is not intended for diesel engines or two-stroke oil-injected systems unless the equipment manufacturer specifies gasoline additive compatibility.