Strong fuel or exhaust odor is noticeable around the generator during or after operation.

Safety first: Carbon monoxide is deadly. Never work in an enclosed space with a running generator. Turn OFF the unit and allow it to cool.

• Inspect exhaust joints: Check the exhaust manifold, flex pipe, and muffler joints for soot marks indicating leaks. Tighten fasteners and replace gaskets as needed.
• Check for fuel seepage: Look for dampness or staining around fuel fittings, carburetor, and injectors. Repair leaks immediately.
• Evaluate combustion: If exhaust is very dark or smells strongly of unburned fuel, inspect air filter and carburetor settings. Replace clogged air filter and correct rich mixture issues.
• Verify exhaust routing: Ensure the Firman exhaust outlet meets clearance requirements from windows, doors, and vents per installation manual.

If odors persist or CO alarms activate, stop using the generator and consult a professional installer.