1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your ACTIVLIFE Carburetor Kit. This kit is specifically designed to be compatible with Briggs & Stratton small engines, including models 10H902-0246-E1 and 10H902-0285-E1. It aims to restore optimal fuel performance, addressing common issues such as rough starts, poor idling, or inconsistent engine operation caused by worn or aging carburetor components.
2. Safety Information
Always prioritize safety when working with engine components. Failure to follow safety precautions can result in serious injury or damage to equipment.
- Disconnect Spark Plug: Before performing any service or maintenance, always disconnect the spark plug wire to prevent accidental engine starting.
- Fuel Handling: Gasoline is highly flammable. Handle fuel in a well-ventilated area, away from open flames or sparks. Store fuel in approved containers.
- Personal Protective Equipment (PPE): Wear appropriate safety glasses, gloves, and other protective gear as needed.
- Hot Surfaces: Engine components can be hot. Allow the engine to cool completely before servicing.
- Ventilation: Ensure adequate ventilation when working with fuel or cleaning agents.
3. Package Contents
Your ACTIVLIFE Carburetor Kit typically includes the following components:
- Carburetor Assembly
- Mounting Gaskets
- Fuel Line (if applicable)
- Fuel Filter (if applicable)
Note: Specific contents may vary slightly. Please inspect your package upon receipt.
4. Setup and Installation
This section outlines the general steps for replacing your engine's carburetor. If you are unsure about any step, it is recommended to consult a qualified service technician.
4.1 Preparation
- Ensure the engine is cool and the spark plug wire is disconnected.
- Drain the fuel tank or clamp the fuel line to prevent fuel leakage.
- Gather necessary tools (wrenches, screwdrivers, pliers, etc.).
4.2 Removing the Old Carburetor
- Carefully remove the air filter assembly.
- Disconnect the fuel line from the carburetor. Be prepared for minor fuel spills.
- Disconnect any throttle linkage, choke linkage, or governor springs attached to the carburetor. Note their positions for reassembly.
- Unbolt the carburetor from the engine intake manifold. Remove any old gaskets.

Figure 1: Top view of the carburetor kit component, highlighting the various ports and mounting points.
4.3 Installing the New Carburetor
- Ensure all mating surfaces are clean and free of debris.
- Place new gaskets in their correct positions between the carburetor and the engine intake manifold.
- Mount the new carburetor, ensuring all bolts are tightened securely but do not overtighten.
- Reconnect the throttle linkage, choke linkage, and governor springs to their original positions. Refer to any notes or photos taken during disassembly.
- Reconnect the fuel line to the carburetor. Ensure a secure connection to prevent leaks.
- Reinstall the air filter assembly.

Figure 2: Side view of the carburetor, showing the lever mechanism for throttle or choke control.

Figure 3: Alternate view of the carburetor, detailing additional connection points and the fuel inlet.
5. Operating Instructions
After installation, perform the following steps to ensure proper operation:
- Refill the fuel tank with fresh, clean fuel.
- Reconnect the spark plug wire.
- Start the engine according to the manufacturer's instructions for your specific equipment.
- Allow the engine to warm up and check for smooth idling and proper throttle response.
- Inspect for any fuel leaks around the carburetor and fuel lines. Address any leaks immediately.
6. Maintenance
Regular maintenance helps prolong the life of your carburetor and ensures consistent engine performance.
- Fuel Quality: Always use fresh, clean gasoline. Stale or contaminated fuel is a primary cause of carburetor issues. Consider using a fuel stabilizer if the equipment is stored for extended periods.
- Fuel Filter: Regularly check and replace the fuel filter (if equipped) to prevent debris from reaching the carburetor.
- Air Filter: A clean air filter is crucial for proper air-fuel mixture. Clean or replace the air filter as recommended by your engine manufacturer.
- Carburetor Cleaning: If performance issues arise, a carburetor cleaning may be necessary. This typically involves disassembling the carburetor and cleaning jets and passages with carburetor cleaner. This should only be performed by individuals familiar with carburetor servicing.
7. Troubleshooting
If your engine experiences issues after carburetor installation, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start or starts hard | No fuel reaching carburetor, incorrect choke setting, clogged fuel filter, spark plug issue. | Check fuel level, ensure fuel valve is open, verify choke operation, replace fuel filter, check spark plug. |
| Engine runs rough or idles poorly | Improper air-fuel mixture, vacuum leak, dirty carburetor jets, old fuel. | Check for loose connections/gaskets, clean carburetor, use fresh fuel. |
| Engine stalls frequently | Fuel starvation, clogged fuel filter, carburetor adjustment needed. | Ensure adequate fuel flow, replace fuel filter, consider professional carburetor adjustment. |
| Fuel leaks from carburetor | Loose connections, damaged gaskets, stuck float. | Tighten connections, replace gaskets, inspect float mechanism (requires disassembly). |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | ACTIVLIFE |
| Compatible Engine Models | Briggs & Stratton 10H902-0246-E1, 10H902-0285-E1 |
| Product Dimensions | 2 x 2 x 2 inches |
| Item Weight | 5 pounds |
| Manufacturer | ACTIVLIFE |
9. Warranty and Support
For information regarding warranty coverage or technical support, please refer to the product packaging or contact ACTIVLIFE customer service directly. Keep your purchase receipt as proof of purchase.
For further assistance, you may visit the ACTIVLIFE website or contact the seller from whom you purchased this product.