Replacing Noisy Onboard Generator In Jayco Grewyhawk With Cummins Onan Quiet Series 4000w
Updated 08/15/2025 | Published 07/17/2025
Question:
I'm replacing a noisy aftermarket generator in my Jayco Greyhawk. Will the Onan QG 4000 be significantly quieter?
asked by: Curtis
Expert Reply:
Yes, the QG 4000w generator # CM42ZR is known for being ultra-quiet, making it a go-to option for national parks and campgrounds.
It's built-in sound-deadening design uses a sealed muffler and vibration isolation. It meets the 60 dB@50 ft standard, so you’ll get more “outdoor coffee and birdsong,” less “lawnmower at the lake.” If you're tired of yelling over your generator, this is your upgrade.
Product Page this Question was Asked From
Onan Generator - QG 4000i EVAP Onboard RV Generator w/ Inverter - 4,000 Watts - Gas - CARB Compliant
- Generators
- Inverter
- Gas
- 3001 - 4000 Watts
- Onboard Generator
- 12V Output
- Carbureted
- Electric Start
- Cummins Onan
more information >
Featured Help Information
Instructions
Continue Researching
- Q&A: What Is Needed To Replace A Onan QG 4000 With A QG 4000i In A Thor Freedom Elite FE27?
- Q&A: Parts Needed for Installation of Onan Generator QG 7000i
- Q&A: Which B&W Fifth Wheel to Gooseneck Adapter Is Best For Towing My Trailer?
- Q&A: Replacement Onan Generator for a Older Onan MicroLite 4000
- Q&A: Is Onan Cummins QG Generator 4000i Actually Better than Previous Generation
- Q&A: Replacement Onan QG-4000 Generator In A Jayco RedHawk 31XL
- Q&A: Which Cushioned Pin Box is Best MORryde Goosetec, B and W or Gen-Y Executive
- Article: 5 Products You Need For Your Next Camping Trip (2022)
- Article: Holiday 2025 | Best Gifts for RVing
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Article: Slipper Spring Trailer Suspension System Review
- Article: Brake Controller Installation: Starting from Scratch
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
Andrew N.
8/15/2025
Hey, did you end up going with the Onan QG 4000 for your Jayco Greyhawk? I'm curious if it made your camping trips more peaceful. Let me know how it worked out for you!