1. Introducció
This manual provides detailed instructions for the installation, operation, and maintenance of your WFLNHB 799866 carburetor. This replacement carburetor is designed to restore optimal fuel delivery to your lawn mower engine, ensuring efficient performance. Please read this manual thoroughly before attempting any installation or maintenance procedures.

Image: Key features of the WFLNHB carburetor, highlighting convenience, durability, and quality.
2. Compatibilitat i ajust
The WFLNHB 799866 carburetor is a direct replacement for various lawn mower models and part numbers. Verify your engine's part number or model to ensure proper fitment.
Números de peça compatibles:
- 790845
- 799871
- 799866
- 796707
- 794304
Compatible Engine Models (Toro, Craftsman, and others):
- Toro 6.5, 6.75, 7.0, 7.25, 7.5HP Recycle Mower 190cc (22" models)
- Craftsman 6.5hp engines
- 124T02, 124T05, 124T07, 126M02
- 129700, 129800, 123H00, 123J00, 124H00, 125H00
- 12G700, 12G800, 12J700, 12J800, 12J900
- 12L800, 12U800, 12V800, 12C700, 12C800, 12D800 4 Cycle Small Engines
- Toro Mower models: 16401, 20716, 20712, 20713, 20714 Walk Behind Mower
- Stens part numbers: 50-657, 520-966

Image: A lawn mower illustrating the application of the WFLNHB carburetor, with fitment information.
3. Contingut del paquet
Your WFLNHB 799866 carburetor package typically includes the following components:
- 1 x WFLNHB 799866 Carburetor
- 1 x Mounting Gasket
- 1 x junta tòrica

Image: The WFLNHB 799866 carburetor shown with the accompanying mounting gasket and O-ring.
4. Informació de seguretat
Always prioritize safety when working with fuel systems and internal combustion engines. Failure to follow these safety guidelines may result in serious injury or property damage.
- Desconnecteu la bugia: Abans de començar qualsevol treball, desconnecteu sempre el cable de la bugia per evitar que el motor arrenqui accidentalment.
- Treballar en una zona ben ventilada: Gasoline fumes are flammable and hazardous. Ensure adequate ventilation.
- Sense flames obertes: Keep all ignition sources, such as sparks, open flames, and smoking materials, away from the work area.
- Utilitzeu equip de protecció: Use safety glasses, gloves, and appropriate clothing to protect yourself.
- Handle Fuel Carefully: Drain fuel into an approved container. Avoid spilling fuel. Clean up any spills immediately.
- Allow Engine to Cool: Never work on a hot engine. Allow it to cool completely before servicing.
- Assegureu la segadora: Ensure the lawn mower is stable and cannot move during the installation process.
5. Guia d'instal·lació
This section outlines the general steps for replacing a carburetor. Specific procedures may vary slightly depending on your lawn mower model. Refer to your mower's service manual for detailed instructions.
Eines necessàries:
- Joc de claus de sòcol
- Joc de tornavís
- Alicates
- Línia de combustible clamp
- Approved fuel container
Instal·lació pas a pas:
- Prepareu la segadora: Ensure the engine is cool. Disconnect the spark plug wire. Place the mower on a stable, level surface.
- Drenar combustible: Use a fuel line clamp to pinch off the fuel line. Disconnect the fuel line from the carburetor and drain any remaining fuel into an approved container.
- Treure el conjunt del filtre d'aire: Carefully remove the air filter cover and air filter. Disconnect any hoses or linkages attached to the air filter housing.
- Disconnect Linkages and Hoses: Note the position of all linkages (throttle, choke) and hoses connected to the old carburetor. Take photos if necessary for reassembly. Carefully disconnect them.
- Treure el carburador vell: Loosen and remove the mounting bolts that secure the carburetor to the engine. Carefully remove the old carburetor, ensuring any gaskets are also removed.
- Superfície de muntatge neta: Clean the engine's mounting surface to ensure a proper seal with the new gasket.
- Instal·leu juntes noves: Place the new gaskets in their correct positions. Ensure they are properly aligned.
- Instal·lar un carburador nou: Position the new WFLNHB 799866 carburetor onto the mounting studs. Secure it with the mounting bolts, tightening them evenly to the manufacturer's specifications (refer to your mower's manual).
- Reconnect Linkages and Hoses: Reattach all throttle and choke linkages, ensuring they move freely. Reconnect the fuel line and any other hoses. Remove the fuel line clamp.
- Torneu a instal·lar el conjunt del filtre d'aire: Reinstall the air filter and air filter housing.
- Refill Fuel Tank: Add fresh, clean gasoline to the fuel tank.
- Torneu a connectar la bugia: Torneu a connectar el cable de la bugia.
Vídeo: Un overview of the WFLNHB 799866 carburetor, demonstrating its components and providing key measurements for fitment verification.
6. Operation After Carburetor Replacement
After successful installation of the new carburetor, follow these steps to start your engine:
- Prime the Engine (if applicable): Some engines have a primer bulb. Press it several times until fuel is visible in the bulb or fuel line.
- Establir l'estrangulador: Move the choke lever to the 'Choke' or 'Start' position.
- Arrancar el motor: Pull the starter rope firmly or engage the electric starter. The engine should start within a few pulls.
- Ajustar l'estrangulador: Once the engine starts, gradually move the choke lever to the 'Run' position as the engine warms up.
- Comproveu si hi ha fuites: While the engine is running, carefully inspect for any fuel leaks around the carburetor and fuel lines. Address any leaks immediately.
Allow the engine to run for a few minutes to ensure proper operation and fuel flow through the new carburetor.
7. Manteniment
Proper maintenance extends the life of your carburetor and ensures consistent engine performance.
- Use Fresh Fuel: Always use fresh, clean gasoline. Stale fuel can cause deposits and clog carburetor passages. Consider using a fuel stabilizer if storing fuel for extended periods.
- Replace Fuel Filter: Regularly check and replace the fuel filter according to your mower's maintenance schedule. A clogged fuel filter can restrict fuel flow to the carburetor.
- Filtre d'aire net: A dirty air filter can restrict airflow, leading to a rich fuel mixture and poor engine performance. Clean or replace the air filter as recommended.
- Emmagatzematge estacional: Before long-term storage, drain the fuel system or run the engine until it runs out of fuel to prevent gum and varnish buildup in the carburetor.
8. Solució De Problemes
If you encounter issues after installing the new carburetor, consider these common troubleshooting steps:
| Problema | Causa possible | Solució |
|---|---|---|
| El motor no arrenca | No fuel, clogged fuel filter, incorrect choke setting, spark plug issue | Check fuel level, replace fuel filter, adjust choke, check/replace spark plug. |
| El motor funciona de manera irregular o s'atura | Dirty air filter, old fuel, vacuum leak, carburetor adjustment needed | Clean/replace air filter, use fresh fuel, check for loose connections/gaskets, consult a professional for carburetor adjustment. |
| Fuites de combustible | Loose connections, damaged gaskets, float bowl issue | Tighten fuel line connections, replace damaged gaskets, inspect float bowl for proper sealing. |
| El motor no té potència | Clogged fuel passages, dirty air filter, improper carburetor adjustment | Ensure fuel is clean, clean/replace air filter, professional carburetor tuning may be required. |
If these steps do not resolve the issue, it is recommended to consult a qualified small engine mechanic.
9. Especificacions
Key specifications for the WFLNHB 799866 Carburetor:
- Marca: WFLNHB
- Número de model: 799866 (Replacement for various models)
- Flange Type: Bolt On
- Tipus de combustible: Gasolina
- Usos recomanats: Segadora de gespa

Image: Detailed dimensions of the WFLNHB carburetor, including inlet and outlet measurements.
10. Garantia i Suport
For warranty information or technical support regarding your WFLNHB 799866 carburetor, please refer to the product packaging or contact WFLNHB customer service directly. Keep your purchase receipt as proof of purchase.
Informació de contacte: Please visit the official WFLNHB website or refer to your product documentation for the most current contact details.