partszen Onan/Cummins Generator Tune-Up Kit — 149-2311 Fuel Pump, 149-2457 Filter & 1403280 Air Filter for 3600/4000 Microlite/Mic

partszen tune-up kit replaces the fuel pump, fuel filter, and air filter in Onan/Cummins 3600–4000 series Microlite and MicroQuiet generators to restore reliable fuel and air delivery.

If your RV generator has been showing signs of rough running, hard starting, or reduced output after hours of service, swapping out worn consumables often brings performance back. This all-in-one kit from partszen includes the 149-2311 replacement fuel pump, the 149-2457 fuel filter, the 1403280 air filter, a molded fuel line, and clamps — everything needed for a standard tune-up on compatible Onan/Cummins Microlite and MicroQuiet models.

Which generator models will this kit work with?

The partszen kit is designed for Onan/Cummins MicroQuiet and MicroLite generators, specifically the 3600 and 4000 (4 kW) series and Camp Power/QG RV models. It fits units using OEM part numbers noted below and cross-references common aftermarket replacements.

• Compatible: MicroQuiet KY 3600 and KY 4000 series
• Also fits: MicroLite KY and Camp Power KYD/QG RV models
• Cross-reference: replaces Airtex 149-2311 and air filter 140-3280

What parts are included, and what do they replace?

The kit bundles the major fuel and air service items needed for a routine preventative maintenance session. Each component matches common OEM part numbers so replacements are straightforward during field service or shop maintenance.

• 1 × 149-2311 fuel pump — replaces Airtex 149-2311, E11007, A029F889 variants
• 1 × 149-2457 fuel filter — fits Ky-series generators and RV QG units
• 1 × 1403280 air filter — replaces 140-3280, 48-2017, 482017 for 3600–4000 models
• 1 × molded fuel line (6×12×630) and 4 clamps for installation

How will installing this kit affect generator operation?

Replacing old fuel pumps, clogged filters, and dirty air elements typically improves starting reliability and steadies engine idle under load. While results depend on overall engine condition, fresh components reduce fuel delivery restrictions and keep combustion air cleaner.

• Smoother starts due to restored fuel pressure and cleaner fuel flow
• More stable idle and fewer stalls under light loads
• Reduced risk of debris entering the carburetor or fuel system

What should I check before buying or installing the kit?

Confirm your generator's model and current part numbers to ensure fitment. Inspect mounting points, connector types, and hose diameters; the included fuel line and clamps suit typical installs but may need minor trimming or repositioning on some units.

• Verify generator model: MicroQuiet or MicroLite 3600/4000 series or Camp Power/QG RV
• Compare existing pump and filter part numbers with 149-2311, 149-2457, 140-3280
• Have basic hand tools and service manual or diagram for safe installation

Who is this for: This partszen tune-up kit is aimed at RV owners, fleet technicians, and do-it-yourselfers who maintain Onan/Cummins Microlite or MicroQuiet 3600–4000 generators. It’s useful for preventive maintenance or troubleshooting fuel/air issues on older units where original parts show wear. If you prefer a single-purchase solution that covers pump, fuel filter, air filter, hose, and clamps, this kit provides those essentials and reduces shopping around for individual components.