Brake Cleaner for Gas Engine Starts: Safety and Effectiveness

Starting a gas engine with brake cleaner can be an effective solution, but it's important to understand the risks and alternatives. This article explores the benefits and dangers of using brake cleaner to start a gas engine, providing safety guidelines and recommendations for better alternatives.

Introduction to Brake Cleaners and Their Usage

Brake cleaners, commonly used in automotive repair shops, contain chemicals such as tetrachloroethylene, freon, and acetone. While these ingredients are highly effective for cleaning brake systems, they can be harmful if inhaled in high concentrations (no freon is used today; acetone and isopropyl alcohol are more common). While not ideal for starting engines, they can be used in an emergency if no other starting fluid is available. Microsprayers or nozzles that deliver a fine mist might be more effective when using brake cleaner.

Alternatives to Brake Cleaners for Starting Engines

For a safer and more effective option, carburetor cleaner and ether starter fluid are recommended. Carburetor cleaner contains solvents that remove dirt and carbon from the carburetor, while ether starter fluid is highly combustible and designed for this purpose. Using these alternatives ensures that your engine gets the proper fuel and lubrication needed for safe and efficient starting.

Dangers of Using Brake Cleaner on Gas Engines

Using brake cleaner to start a gas engine is not without risks. Brake cleaner is designed to be a drying solvent, and its lack of lubrication properties can cause significant damage to your engine if used in excess. For 2-stroke engines, which rely on fuel mixture with oil, using too much brake cleaner can lead to clogs and damage to engine components such as the carburetor or throttle body. This is due to the surfactants in brake cleaner, which are not designed for engine systems and can cause residue buildup.

Chemical Properties and Safety Concerns

Tetrachloroethylene, a key component in brake cleaners, is extremely effective as a quick-drying, non-flammable solvent. However, heating this chemical beyond 315 degrees Celsius can result in the formation of phosgene, a highly toxic gas. This underscores the importance of caution when using brake cleaner, particularly in hot environments such as during welding. Safety guidelines should always be followed when working with flammable or toxic substances.

Conclusion

While brake cleaner can be used to start a gas engine in an emergency, it is not recommended due to its lack of lubrication and the potential for residue buildup. For safer and more effective results, carburetor cleaner and ether starter fluid are superior alternatives. Using these fluids ensures that your engine receives the proper combination of fuel and lubrication, reducing the risk of damage and ensuring a smooth start. Always prioritize safety and follow the recommended practices to avoid potential hazards.