Gas-Powered Engine Will Not Start or Is Hard to Start

Gas-Powered engines may not start or is hard to start for several reasons. Common causes include:

• Flooded engine (most common with new engines): An engine may become flooded if the starter rope is pulled several times with the choke in the closed (cold start) position and the engine does not start. In some cases, the engine may briefly "pop" or attempt to start before stopping. This indicates the engine attempted to start but could not continue running because the choke remained closed, causing the engine to flood. To check if the engine is flooded, refer to Clearing a Flooded Engine for step-by-step instructions. 
• Fuel/Oil: Use fresh fuel that is less than 30 days old, rated 89–93 octane, and free of water or debris. Always use ECHO® Red Armor® 2-Stroke Engine Oil or an oil that meets ISO-L-EGD and JASO M345 FD performance standards. Mix fuel and oil at the ratio specified in your operator's manual. 
• Fuel Delivery System: Inspect the fuel lines for cracks, kinks, or blockages. Also check the fuel filter for restrictions and ensure the purge bulb is not cracked and fills properly with fuel. 
• Ignition System: Inspect the spark plug for fouling, damage, or an incorrect gap. Verify that the spark plug boot is securely attached and that the ignition wires are not loose, pinched, or damaged. 
• Air Intake System: Ensure the pre-filter, air filter, and filter base are clean and free of dirt and debris. 
• Exhaust System: Inspect the spark arrestor screen and exhaust port for excessive carbon buildup, which can restrict exhaust flow and affect engine performance.

If the engine still will not start after completing these troubleshooting steps above, one or more of the following components may require further diagnosis by an authorized ECHO® dealer. 

• Carburetor: If fuel was left in the unit for more than 60 days before storage, the carburetor may require cleaning, rebuilding, adjustment, or replacement. As fuel ages, it oxidizes and can leave varnish deposits that restrict fuel flow. Additionally, units operated above 5,000 feet (1,524 m) may require a carburetor adjustment for high-altitude operation.  
• Ignition Coil/Module: A failing ignition coil or module may cause the engine to lose spark, resulting in a no-start condition or causing the engine to shut off until it has cooled.
• Engine: Internal engine damage or overheating may also prevent the engine from starting. Overheating can result from operating with fuel below the recommended octane rating or from debris restricting airflow through the engine cooling fins.

If the issue persists, the product should be inspected by an authorized ECHO® dealer. Diagnosing and repairing these components requires specialized tools, testing equipment, and technical expertise. Use our Dealer Locator to find a dealer.