GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Cummins Onan QG4000

In this review of the GPS GENERATOR PARTS SPECIALIST Tune Up Kit for the Cummins Onan QG4000 (4KY), the bottom line is simple: this kit is designed for RV owners and technicians who prefer an OEM-based, all-in-one maintenance package. The reviewer found the kit valuable because it includes the specific Onan hard parts required for routine service plus oil matched to Spec P through R, saving time hunting for compatible items. For anyone maintaining a QG4000, the kit removes ambiguity about parts and oil selection.

Key Features

• Complete OEM parts: The kit includes Onan spark plug, air filter and fuel filter so users replace the factory-specified hard parts during routine maintenance.
• ONAMAX oil included: Two bottles of Onan ONAMAX 10W30 are provided to meet the oil spec requirements for Spec P through R engines so oil selection is correct for the generator.
• Spark plug gap tool and guidance: A dedicated spark plug gap tool and documentation are included to ensure the spark plug is set to the proper gap for reliable ignition.
• Packaged for the QG4000: Components are assembled specifically for the Cummins Onan QG4000 model 4KY, reducing the chance of buying incompatible items.
• OEM part numbers listed: The kit lists Onan part numbers for the spark plug, filters and oil which helps confirm authenticity when ordering replacement parts later.

Who It's For

This kit is best for RV owners, fleet managers or independent technicians who perform routine maintenance on the Cummins Onan QG4000 (4KY) generator and want to use genuine Onan parts and oil. It suits users who prefer having all required service parts and the correct oil grade in one shipment to avoid downtime on trips.

Those who should look elsewhere are owners of different Onan models or generators that require a different oil spec; this kit is tailored to the 4KY QG4000 and the included ONAMAX oil labeled for Spec P through R. Also, buyers who prefer aftermarket parts rather than OEM should compare options outside this package.

Pros & Cons

Pros

• Includes genuine Onan hard parts which match factory service requirements for consistent fit and function.
• Supplies ONAMAX 10W30 oil in the quantity needed, eliminating guesswork about correct lubricant for Spec P-R engines.
• Provides a spark plug gap tool and documentation to help ensure proper setup and longer service life.

Cons

• Some customers reported mixed experiences with smaller items like the oil filter or gap tool which suggests occasional missing or variable feedback on these components.

Specifications

Kit for model	Cummins Onan QG4000 (4KY)
Oil included	ONAMAX 10W30 (QTY 2) PN A063E183
Spark plug	Onan PN 167-0275
Air filter	Onan PN 140-3280
Fuel filter	Onan PN 149-2457
Spark plug gap tool	GPS PN 627-0560

Our Verdict

The GPS tune up kit is a practical, value-oriented choice for anyone servicing a Cummins Onan QG4000 who wants OEM parts and the correct ONAMAX oil without sourcing items individually. It removes uncertainty about compatible components and includes useful setup guidance, making it a time-saving option and good maintenance value for owners committed to factory-spec service.

Frequently Asked Questions

Does this kit include the correct oil for my QG4000?
Yes, the kit includes two bottles of Onan ONAMAX 10W30 labeled for use with Spec P through R, which matches the kit description.

Are all parts genuine Onan components?
Yes, the hard parts listed in the kit are OEM Onan parts with the part numbers provided for confirmation.

Will this kit work for other Onan generator models?
This kit is assembled specifically for the Cummins Onan QG4000 (4KY); owners of other models should verify compatibility before purchase.