Premium replacement carburetor for Cummins Onan Microquiet 4000-Watt generators. Fits KY series including 4KYFA26100, 4KYFA26100P, and 4KYFA26100K. Direct replacement for part numbers 146-0785, 146-0803, 146-0635, 146-0703, 146-0742, 146-0743, 146-0759, and A042P619. This high-performance carburetor assembly resolves common generator surging, stalling, and rough idle issues caused by clogged fuel jets or stale gasoline. Engineered to exact OEM specifications for a direct drop-in fit. Pre-adjusted for optimal air-fuel mixture to restore peak power output to your RV generator. Includes necessary mounting accessories as pictured. Professional installation and complete fuel line flush recommended prior to installation for optimal performance. New. Heavy-Duty Generator Carburetor
For Cummins Onan Microquiet 4000 (KY Series) | PN: 146-0785 / 146-0803
⚠️ Verify Your Generator Model
Please confirm your part number or generator model before purchasing to ensure a perfect fit:
Replaces OE Part Numbers: 146-0785, 146-0803, 146-0635, 146-0703, 146-0742, 146-0743, 146-0759, A042P619, A041D736. - Fits Generator Models: Microquiet 4000-Watt (4KYFA26100, 4KYFA26100P, 4KYFA26100K).
🔧 Pro-Tips: Installation & Troubleshooting
RV generators are highly sensitive to fuel quality. Follow these steps to prevent your new carburetor from clogging instantly:
Step 1: Flush the Fuel Lines (CRITICAL)
Old, varnished fuel is the #1 killer of new carburetors. Drain the old fuel from the tank and flush the lines completely before connecting this new unit. We highly recommend replacing the inline fuel filter as well.
Troubleshooting: Still Surging or Hunting?
If your generator RPM still fluctuates (surges) after installing this new carburetor, check your fuel pump. A weak fuel pump cannot maintain the correct float bowl level, which perfectly mimics a clogged carburetor symptom.
Technical Specifications Application for Cummins Onan KY Series Generators Condition 100% Brand New Aftermarket Replacement Material Heavy-Duty Corrosion Resistant Alloy Fitment Type Direct Bolt-On Replacement Key Features
Restore Peak Power: Eliminates rough idling and stalling caused by degraded factory carburetors. - Precision Engineered: Machined to exact OEM tolerances for perfect air-fuel mixture delivery.
- Ready to Run: Factory preset and ready to install. Minor idle adjustments may be required depending on your altitude.
📦 What's in the Box
🤝 Dedicated Customer Support
We stand behind the quality of our generator parts. If you experience any issues with shipping, quality, or fitment, please do not open a case immediately.
Contact Us First: Send us an message. Our dedicated tech support team will guide you on how to resolve the issue correctly and efficiently, saving you time and frustration.
