1. Introduction
This manual provides instructions for the installation, operation, and maintenance of the HUAYI OEM Carburetor, model 951-14423. This carburetor is designed as a replacement part for various outdoor power equipment models from Cub Cadet, Troy Bilt, and MTD. Please read this manual thoroughly before attempting any installation or maintenance procedures.
2. Product Overview
The HUAYI OEM Carburetor 951-14423 is a high-quality replacement component manufactured from durable materials, tested to meet or exceed OEM quality standards. It is designed to ensure optimal fuel delivery to your engine.

Image 2.1: Overview of the HUAYI OEM Carburetor with included gaskets.
2.1 Package Contents
- 1 x HUAYI OEM Carburetor (Model 951-14423)
- 3 x Gaskets
2.2 Key Features
- Direct OEM replacement for part numbers 751-14423, 951-14423, 5X65RU.
- Constructed from high-quality, durable materials.
- Tested for performance and reliability.
3. Compatibility
This carburetor is compatible with the following equipment models. Please verify your equipment's model number and existing carburetor part number before installation.
3.1 Cub Cadet Models
- LE100
- SC100
- SC300
- SC500
- ST100
3.2 MTD Models
- RM120
- RM210
- RM220
- RM2210
3.3 Troy-Bilt Models
- TB105
- TB120
- TB220
- TB115
- TB270
4. Safety Information
WARNING: Always disconnect the spark plug wire before performing any maintenance or installation on your equipment to prevent accidental starting.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Ensure the work area is well-ventilated and free from ignition sources when handling fuel.
- Refer to your equipment's original owner's manual for specific safety precautions and procedures.
- Fuel is highly flammable. Handle with extreme care.
5. Installation Instructions
The following steps outline the general procedure for replacing a carburetor. Specific steps may vary depending on your equipment model. Always consult your equipment's service manual for detailed instructions.
- Preparation:
- Ensure the engine is cool.
- Disconnect the spark plug wire.
- Drain the fuel tank or clamp the fuel line to prevent fuel leakage.
- Remove Air Filter Assembly:
Locate and remove the air filter housing and air filter to access the carburetor.
- Disconnect Linkages and Fuel Line:
Carefully disconnect the throttle and choke linkages from the old carburetor. Disconnect the fuel line, being prepared for any residual fuel.
- Remove Old Carburetor:
Unbolt the old carburetor from the engine. Note the position and orientation of any gaskets or spacers.

Image 5.1: Side view of the carburetor, showing fuel inlet and mounting points.
- Install New Carburetor:
Place the new gaskets (provided) in the correct positions. Mount the new HUAYI carburetor onto the engine, ensuring a snug fit. Tighten mounting bolts securely but do not overtighten.

Image 5.2: The carburetor assembly with the three included gaskets.
- Reconnect Linkages and Fuel Line:
Reconnect the throttle and choke linkages, ensuring they operate smoothly. Reattach the fuel line and secure it with a clamp if necessary.
- Reinstall Air Filter Assembly:
Reinstall the air filter and its housing.
- Final Checks:
Reconnect the spark plug wire. Refill the fuel tank if it was drained. Check for any fuel leaks before starting the engine.
Video 5.3: A brief overview of the HUAYI Carburetor, showing various angles and components. This video can assist in visual identification during installation.
6. Operating Instructions
After successful installation, follow your equipment's standard starting procedure. The carburetor is pre-tuned for general use. Fine-tuning may be required for optimal performance in specific conditions, though typically not necessary for this OEM replacement.
- Ensure the fuel tank contains fresh, clean fuel.
- Check oil levels before starting.
- Follow the manufacturer's instructions for choking and starting your specific equipment.
7. Maintenance
Proper maintenance ensures the longevity and performance of your carburetor and equipment.
- Fuel Quality: Always use fresh, clean fuel. Stale fuel can cause deposits that clog the carburetor. Consider using a fuel stabilizer if equipment is stored for extended periods.
- Fuel Filter: Regularly inspect and replace the fuel filter according to your equipment's maintenance schedule.
- Air Filter: A clean air filter is crucial for proper engine operation. Clean or replace the air filter as recommended by your equipment manufacturer.
- Storage: Before long-term storage, run the engine until it runs out of fuel, or drain the fuel system to prevent fuel degradation and carburetor clogging.
8. Troubleshooting
If your equipment experiences issues after carburetor replacement, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel, clogged fuel line/filter, spark plug issue, incorrect choke setting. | Check fuel level, inspect fuel line/filter, check spark plug, adjust choke. |
| Engine runs rough/stalls | Dirty air filter, stale fuel, minor carburetor adjustment needed. | Clean/replace air filter, use fresh fuel, consult service manual for idle adjustment. |
| Fuel leaks | Improperly seated gaskets, loose fuel line connection, damaged fuel line. | Inspect gasket seating, tighten fuel line clamps, replace damaged fuel line. |
If problems persist, it is recommended to consult a qualified service technician or your equipment's service manual.
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | 951-14423 |
| OEM Part Numbers | 751-14423, 951-14423, 5X65RU |
| Brand (as listed) | HUAYI (Manufactured by LIZAPUS) |
| Fuel Type | Gasoline |
| Product Dimensions (D x W x H) | 3" x 4" x 3" |
| Material | Aluminum (Exterior Finish) |
| GTIN / UPC | 708111961387 |
10. Warranty and Support
For information regarding warranty coverage or technical support, please refer to the seller's policies or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.