GPS Tune-Up Kit for Cummins Onan QG4000 (4KY) — ONAMAX 10W30, OEM Parts, 2 Bottles

Complete OEM tune-up kit for the Cummins Onan QG4000 (4KY) that includes ONAMAX 10W30 oil and all required Onan replacement parts for a proper maintenance service.

This GPS Generator Parts Specialist tune-up kit is curated for the Cummins Onan QG4000 (model 4KY) and contains only genuine Onan components plus GPS extras to simplify routine service. The set includes ONAMAX oil blended for Spec P through Spec R engines, factory air, fuel and spark plug parts, plus a spark plug gap tool and documentation so you can choose the right oil and set the plug gap correctly. Everything ships together to reduce ordering errors and ensure fit and performance.

Which parts are included and why do they matter?

The kit bundles the exact Onan OEM parts required for a standard maintenance interval, eliminating uncertainty about compatibility. Using the specified parts helps maintain the generator’s designed tolerances and filtration, and the ONAMAX oil supplied matches Cummins Onan specifications for this model range.

• ONAMAX Oil 10W30 (Qty: 2) PN: A063E183 — correct viscosity for Spec P–R
• Spark Plug PN: 167-0275 — factory electrode and heat range
• Air Filter PN: 140-3280 — restores proper intake filtration
• Fuel Filter PN: 149-2457 — protects carburetor and fuel system
• GPS Spark Plug Gap Tool PN: 627-0560 — sets OEM gap accurately
• Printed guidance — oil selection and spark plug gap specs

How does this kit simplify maintenance for the QG4000?

Instead of sourcing multiple parts from different vendors, the kit delivers a single matched package that follows Onan’s maintenance recommendations. The included documentation explains oil spec choices and provides the correct spark plug gap, which reduces service time and guesswork.

• All parts ship together to avoid missing components
• OEM numbers ensure direct fit and compatibility
• Instructions and gap tool make DIY servicing straightforward

Will the provided ONAMAX 10W30 work for my engine spec?

The kit’s ONAMAX 10W30 is selected to cover Cummins Onan service specs P through R for the QG4000 family. The documentation included explains when this viscosity is appropriate and how it aligns with the manufacturer’s recommendations so you can confirm correct use for your specific serial range.

• ONAMAX PN: A063E183 labeled for Spec P–R engines
• Two bottles included to meet typical oil-change volume
• Documentation helps verify oil choice against serial/model

Can I perform the service myself, or should a technician do it?

The kit is designed for both competent DIYers and professional technicians. It provides OEM parts and tools needed for a standard tune-up; however, if you’re unfamiliar with generator servicing or safety procedures, a qualified service technician is recommended.

• Includes spark plug gap tool and clear part numbers
• Factory parts reduce risk of fitment issues
• Professional installation ensures warranty and safety compliance

Who this is for: RV owners, fleet operators, and service shops that maintain Cummins Onan QG4000 (4KY) generators and want a single, factory-correct package to perform routine maintenance. If you prefer genuine Onan components, need the correct oil for Spec P–R engines, and value clear documentation plus a gap tool, this GPS tune-up kit gives you the parts and guidance to complete the job confidently.