DuroStar Rich Fuel Mixture / Incomplete Combustion

Black smoke from exhaust and engine runs rough or lacks power.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Choked or stuck choke plate, Carburetor float/needle issue, Dirty air filter, Incorrect gas regulator setting (LP/NG)

Safety first: Run the generator outdoors only. Turn OFF and cool before adjusting carburetor or regulator.

Check choke operation: Ensure the choke plate opens fully after warm‑up. Repair or adjust the choke linkage or automatic choke system.
Replace air filter: Install a new DuroStar air filter if the old one is dirty.
Service carburetor: Clean or replace the carburetor if flooding or rich running persists.
Verify regulator setting: Have a gas technician confirm correct outlet pressure from the LP/NG regulator.

Medium 3/5

Carburetor Assembly

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