ZJTBLL Onan RV QG Generator Tune-Up Kit for 5500/7000 - Filters, Plugs & Wrench

Keep your Onan RV QG generator running dependably with a single maintenance kit that contains the parts most frequently replaced during routine service. This ZJTBLL kit brings together OEM-compatible filters, spark plugs, a specialized oil-filter wrench and essential small parts so you can perform a thorough tune-up before a season of travel or extended storage.

How does this kit improve generator reliability?

Replacing worn filters and spark plugs reduces strain on the engine and helps maintain consistent starting and running. Clean oil and air passages plus fresh fuel filtration minimize contaminant-related wear so the generator operates closer to factory spec.

• Oil filter 122-0836 removes carbon, metal debris and dirt for smoother oil flow.
• Air filter 140-3116 blocks dust and particulates from the intake stream.
• Fuel filter 149-2341-01 prevents clogging of injectors and fuel pump wear.
• New spark plugs 167-1638 ensure reliable ignition and efficient combustion.

What parts are included and why they matter?

The kit contains the core consumables plus a few useful tools to simplify installation. Each item targets a specific failure mode so addressing them together produces the most noticeable improvement in performance and longevity.

• 1 x Oil filter (122-0836) — replaces degraded media that traps oil contaminants.
• 1 x Air filter (140-3116) — restores proper airflow and filtration capacity.
• 1 x Fuel filter (149-2341-01) — keeps debris out of the fuel system and pump.
• 2 x Spark plugs (167-1638), oil-filter wrench (420-0577), gap tool (627-0560) and clamps for installation.

Which generators and models will this kit fit?

This tune-up set is crafted for Onan RV QG generator families and is compatible with several common model codes. Double-check your generator model number to confirm fit before ordering.

• Compatible with Onan RV QG 5500 and 7000 series generators.
• Fits model codes HGJAA, HGJAB, HGJAC and Marquis Platinum QG EFI.
• Suitable for Marquis Gold / RV QG units that list the referenced part numbers.

When should you replace these components?

Replace the kit whenever routine service intervals call for it or when symptoms of wear appear. Early replacement prevents more expensive repairs caused by contaminated oil, clogged filters or fouled plugs.

• Change at manufacturer-recommended service intervals or annually for heavy use.
• Replace sooner if you notice hard starting, loss of power, or noisy fuel pump operation.
• Install fresh filters and plugs after dusty operation or extended storage periods.

Who is this for: RV owners, fleet technicians and mobile service professionals who maintain Onan RV QG 5500 and 7000 generators will find this ZJTBLL tune-up kit convenient and cost-effective. It’s designed for anyone performing scheduled maintenance who wants OEM-compatible parts and the small tools needed to complete a standard generator tune-up without multiple separate purchases. If you do your own maintenance or run a maintenance shop servicing RV generators, this kit assembles the frequently replaced items into one ready-to-use package.