1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your Pro Chaser BL110 Carburetor. Please read these instructions carefully before attempting any installation or service to ensure proper function and safety. This carburetor is designed as a replacement part for specific Bolens 25cc and 27cc string trimmer models.
2. Package Contents
Verify that all components listed below are present in your package:
- 1 x Carburetor
- 2 x Gaskets
- 2 x Primer Bulbs
- 1 x Spark Plug
- 2 x Fuel Hoses
- 1 x Fuel Filter
- 1 x Adjustment Tool
- 1 x Air Filter
Image of the Pro Chaser BL110 Carburetor kit, including the carburetor, gaskets, primer bulbs, spark plug, fuel hoses, fuel filter, adjustment tool, and air filter.
3. Compatibility
This Pro Chaser BL110 Carburetor is compatible with the following Bolens 25cc and 27cc String Trimmer models:
- Bolens BL110
- Bolens BL160
- Bolens BL125
- Bolens BL425
- Bolens 41BD130G965
- Bolens 41AD110G965
- Bolens 41BD110G965
- Bolens 41BD160G965
- Bolens 41BD180G965
- Bolens 41CD160G965
- Bolens 41AD160G965
Always verify your specific trimmer model number before installation to ensure proper fitment.
4. Safety Information
Always observe the following safety precautions when working with small engines and fuel:
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Work in a well-ventilated area to avoid inhaling fuel fumes.
- Ensure the engine is cool before beginning any work to prevent burns.
- Disconnect the spark plug wire to prevent accidental starting.
- Handle fuel with extreme care. Store fuel in approved containers away from ignition sources.
- Keep children and pets away from the work area.
- Refer to your string trimmer's original owner's manual for specific safety guidelines and procedures.
5. Setup and Installation
The following steps provide a general guide for carburetor replacement. Specific procedures may vary slightly depending on your trimmer model. Always consult your trimmer's service manual for detailed instructions.
5.1 Pre-Installation
- Ensure the trimmer's fuel tank is empty or nearly empty.
- Disconnect the spark plug wire.
- Clean the area around the existing carburetor to prevent debris from entering the engine.
5.2 Removal of Old Carburetor
- Carefully disconnect the fuel lines from the old carburetor. Note their positions for reinstallation.
- Disconnect the throttle linkage and choke linkage.
- Unbolt the old carburetor from the engine. Remove and discard the old gaskets.
5.3 Installation of New Carburetor
- Place new gaskets on the engine mounting studs.
- Mount the new Pro Chaser BL110 Carburetor onto the engine, ensuring it aligns correctly with the mounting studs.
- Secure the carburetor with the original bolts, tightening them evenly.
- Reconnect the throttle and choke linkages. Ensure they operate smoothly without binding.
- Install the new fuel lines, primer bulbs, and fuel filter as needed. Ensure all connections are secure and free of leaks.
- Replace the old spark plug with the new one provided.
- Install the new air filter.
Side view of the Pro Chaser BL110 Carburetor, highlighting the 30.5mm (1.2 inch) mounting dimension.
6. Operating Instructions
After installation, perform the following steps for initial startup and operation:
6.1 Initial Startup
- Refill the fuel tank with the appropriate fuel mixture for your 2-stroke engine.
- Prime the carburetor by pressing the primer bulb several times until fuel is visible in the bulb and flows freely.
- Set the choke to the appropriate starting position (usually full choke).
- Pull the starter rope until the engine attempts to start or fires once.
- Move the choke to the half-choke or run position.
- Pull the starter rope again until the engine starts. Allow it to warm up for a few moments before engaging the throttle.
6.2 Carburetor Adjustment
Your new carburetor may require fine-tuning for optimal performance. Use the provided adjustment tool for this purpose. Typically, there are two adjustment screws: a High-speed (H) screw and a Low-speed (L) screw. Some carburetors may also have an idle speed screw.
- General Starting Point: Turn both H and L screws clockwise until they lightly seat, then turn them counter-clockwise 1 to 1.5 turns.
- Low-Speed Adjustment (L): With the engine running at idle, adjust the L screw to achieve a smooth, consistent idle without the engine stalling or racing.
- High-Speed Adjustment (H): With the engine running at full throttle (without load), adjust the H screw to achieve maximum RPMs without the engine sputtering or sounding lean. Avoid over-leaning the engine, which can cause damage.
- Idle Speed Adjustment: If present, adjust the idle speed screw to set the desired engine idle RPM.
Always make small adjustments (1/8 to 1/4 turn at a time) and observe the engine's response. If you are unsure, consult a qualified service technician.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your carburetor and trimmer.
- Fuel Filter: Inspect and replace the fuel filter periodically (e.g., annually or every 50 hours of operation) to prevent contaminants from reaching the carburetor.
- Air Filter: Clean or replace the air filter regularly. A dirty air filter can restrict airflow, causing the engine to run rich and lose power.
- Spark Plug: Inspect the spark plug for wear, carbon buildup, or damage. Replace it if necessary. Ensure the gap is set correctly according to your trimmer's specifications.
- Fuel Lines: Check fuel lines for cracks, hardening, or leaks. Replace any damaged lines promptly.
- Carburetor Cleaning: If the carburetor becomes clogged or dirty, it may require cleaning. This typically involves disassembling the carburetor, cleaning passages with carburetor cleaner, and replacing any worn diaphragms or gaskets. This procedure is recommended for experienced users or professional service.
8. Troubleshooting
If your trimmer experiences issues after carburetor installation, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel, clogged fuel filter, incorrect choke setting, faulty spark plug, improper carburetor adjustment. | Check fuel level, replace fuel filter, adjust choke, replace spark plug, adjust carburetor screws. |
| Engine runs rough or stalls at idle | Improper low-speed carburetor adjustment, dirty air filter, clogged fuel filter. | Adjust low-speed (L) screw, clean/replace air filter, replace fuel filter. |
| Loss of power at high RPM | Improper high-speed carburetor adjustment, dirty air filter, restricted exhaust. | Adjust high-speed (H) screw, clean/replace air filter, check exhaust for blockages. |
| Fuel leaks | Loose fuel lines, damaged gaskets, cracked primer bulb. | Tighten fuel line clamps, replace gaskets, replace primer bulb. |
If problems persist after attempting these solutions, it is recommended to seek assistance from a qualified service technician.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Pro Chaser |
| Model Number | PC727 |
| Item Weight | 8.1 ounces |
| Package Dimensions | 6.65 x 5.75 x 2.68 inches |
| Flange Type | Bolt On |
| Fuel Type | Clear (referring to fuel line color) |
| UPC | 736961620086 |
10. Warranty Information
For specific warranty details regarding your Pro Chaser BL110 Carburetor, please refer to the product listing at the time of purchase or contact the seller directly. Warranty terms typically cover manufacturing defects for a limited period.
11. Support
If you require further assistance or have questions not covered in this manual, please contact Pro Chaser customer support through the retailer's platform where the product was purchased. Provide your model number (PC727) and a detailed description of your issue for efficient support.