Cummins Onan air filter replacement 140-3116 for Marquis Gold/Platinum QG, compact universal fit

The Cummins NW 1403116 Onan air filter is a direct-fit replacement designed to protect Onan Marquis Gold and Platinum QG engines by trapping dirt and debris before it reaches the engine.

This Cummins replacement air filter (140-3116) is specified for Onan Marquis Gold and Marquis Platinum QG EFI generators used in RVs and light commercial applications. It provides a universal-fit solution sized to match common Onan housings, helping maintain airflow quality and engine performance between service intervals. The compact packaged dimensions make it easy to store a spare in your onboard parts kit.

Which engines and models does this filter fit?

This filter is made for Onan Marquis Gold and Marquis Platinum QG EFI generator models. It is a universal-fit design intended to work with the related intake housings used on those generator families.

• Compatible with Onan Marquis Gold / RV QG series
• Compatible with Marquis Platinum QG EFI models
• Universal fit intended for common Onan housing configurations
• Part number reference: Cummins / Onan 140-3116

How does the 140-3116 filter help engine performance?

By capturing airborne particles before they enter the intake, this air filter reduces abrasive contaminants that accelerate wear. Cleaner intake air supports steady combustion and helps sustain generator efficiency over time.

• Removes dust, dirt and particulates from intake air
• Helps preserve internal engine components and seals
• Contributes to consistent power output under load
• Simple replacement lowers maintenance complexity

What are the physical dimensions and packaging details?

The filter ships in a compact package convenient for storage or on-board spares. The listed package dimensions indicate a slim footprint, making it easy to keep an extra unit with your RV parts without consuming much space.

• Package size: approximately 4.191 cm L × 26.593 cm H × 17.399 cm W
• Lightweight, compact packaging for convenient storage
• Universally sized to fit common Onan intake housings
• Part number printed for quick identification during service

How do I install and when should I replace it?

Installation is straightforward: remove the old filter from the intake housing and seat the new filter according to the generator’s access orientation. Replace the filter on a regular schedule based on hours of operation and operating environment—more frequently in dusty conditions.

• Swap using standard Onan intake access procedures
• Inspect at every scheduled generator service interval
• Replace sooner if operating in dusty or polluted environments
• Keep a spare aboard for emergency or remote servicing

Who is this for? The Cummins NW 1403116 Onan air filter is ideal for RV owners, fleet operators, and service technicians who maintain Onan Marquis Gold and Marquis Platinum QG generators. If you need a reliable, OEM-referenced replacement that’s easy to store and quick to install, this filter is designed to meet routine maintenance needs and help keep your generator running cleanly between services.