Generator Noise and Muffler Information

DuroMax generators are equipped with oversized automotive-style mufflers designed to reduce engine noise as much as possible while maintaining proper engine performance.

The majority of the sound produced by a generator comes from the engine operation itself, not the muffler.

Use of Third-Party Muffler Silencers

DuroMax does not recommend installing third-party muffler silencers or exhaust modifications in an attempt to reduce generator noise.

Modifying the exhaust system can cause:

• Reduced engine performance

• Increased engine backpressure

• Potential engine damage

Warranty and Emissions Notice

⚠ Important:
Any modifications made to the factory exhaust system may:

• Void the generator warranty

• Violate emissions regulations

For this reason, the generator should be operated with the original exhaust system installed by the manufacturer.

Common Questions

Why is my generator loud?

Portable generators use combustion engines, which naturally produce noise during operation. The engine itself is the primary source of sound.

Can I install a muffler silencer to make the generator quieter?

No. DuroMax does not recommend using aftermarket muffler silencers or modifying the exhaust system.

Will modifying the exhaust affect my warranty?

Yes. Modifying the exhaust system or installing third-party silencers may void the generator warranty.

How can I reduce generator noise safely?

Instead of modifying the muffler, you may consider:

• Placing the generator farther away from living spaces

• Positioning it on a soft surface such as grass or dirt

• Using sound barriers that do not restrict airflow

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