Generator starts but stalls or surges repeatedly, especially under light load; no error code shown.

Safety first: Turn OFF the generator, close the fuel shutoff valve, and disconnect the battery negative cable. Work in a well‑ventilated area away from flames.

• Drain old fuel: If the unit has sat for months, drain the fuel tank and carburetor bowl. Refill with fresh fuel of the type specified by WEN.
• Clean carburetor bowl: Remove the carburetor bowl drain plug or the bowl itself. Catch fuel in an approved container. Clean the bowl and main jet with carburetor cleaner and compressed air.
• Inspect jets and passages: Remove the main jet and emulsion tube if accessible. Soak in carb cleaner and blow out all holes. Do not enlarge jet orifices.
• Replace gaskets if needed: If the bowl gasket is brittle or damaged, install a new carburetor gasket kit.
• Reassemble and test: Reinstall the bowl, open the fuel valve, check for leaks, and start the generator. Allow it to warm up and verify stable operation under load.