Generator starts but immediately stalls when load is applied; no code shown.

Safety first: Disconnect the generator from the building load at the transfer switch before testing.

• Run with no load: Start the generator and let it warm up without load. If it runs smoothly, the basic engine is likely OK.
• Inspect air filter: Remove the Hyundai Power air filter element. If it is dirty or oil-soaked, replace it. A quick test run with the filter temporarily removed (in a clean environment) can confirm restriction.
• Check fuel flow at higher demand: Replace the fuel filter and inspect the fuel pump output. A weak pump may supply enough fuel at idle but not under load.
• Clean carburetor (gas): Remove the carburetor bowl and clean jets with carb cleaner. Reassemble with new gaskets if needed.
• Gradual load application: Apply loads in stages rather than all at once to avoid sudden engine bogging.