C·T·S Carburetor Repair/Rebuild Kit for Tillotson RK-23HS Carburetors

1. Introduction

This manual provides comprehensive instructions for the installation, operation, and maintenance of your C·T·S Carburetor Repair/Rebuild Kit. This kit is designed to replace components in Tillotson RK-23HS carburetors, restoring optimal performance to your equipment. Please read this manual thoroughly before beginning any work to ensure proper procedure and safety.

2. Product Overview

2.1 Kit Contents

The C·T·S Carburetor Repair/Rebuild Kit includes all necessary gaskets, diaphragms, and small components required to overhaul a compatible Tillotson RK-23HS carburetor. The exact components may vary slightly but typically include:

• Metering diaphragm
• Pump diaphragm
• Various gaskets
• Metering needle
• Pivot arm
• Inlet screen
• Small metal balls/check valves

Figure 1: Components of the C·T·S Carburetor Repair/Rebuild Kit. This image displays all the individual components included in the kit, featuring various gaskets, diaphragms, a metering needle, a pivot arm, and small metal balls, essential for a complete carburetor overhaul.

2.2 Compatibility

This repair kit is designed for Tillotson RK-23HS carburetors found in various equipment models, including but not limited to:

• Pioneer-Partner: P40, P41, P60, P61, P70, P85, K1200
• Husqvarna: 61 (new model), 162, 165R, 265RX, 266, 268, 181, 281, 272XP, 2100
• Poulan: 201, 223, 245, 360, 400, 450, 451, 4200, 5200, 36
• Homelite: SuperXL, SXL915
• Oleomac: 261, 251, 254, 350, 481, 482
• Stihl: 051
• Echo: CS60, CS900, CS1200
• Jonsered: 625, 630, 670, 920, 930, 2094
• Alpina: 40, P70
• Dolmar: Powercut, P6001i, P6800i
• Solo: 650, 660

Always verify compatibility by comparing the components in this kit with the parts being replaced in your specific carburetor model before installation.

3. Safety Information

Working with fuel systems and small engines requires caution. Please observe the following safety guidelines:

• Ventilation: Work in a well-ventilated area to avoid inhaling fuel fumes.
• Fire Hazard: Keep open flames, sparks, and other ignition sources away from the work area. Fuel is highly flammable.
• Eye Protection: Always wear safety glasses to protect your eyes from fuel splashes or debris.
• Gloves: Wear fuel-resistant gloves to protect your skin from fuel and cleaning solvents.
• Fuel Drainage: Drain all fuel from the equipment's tank and carburetor before beginning work.
• Disposal: Dispose of old fuel and carburetor components according to local environmental regulations.
• Tools: Use appropriate tools for disassembly and reassembly to prevent damage to components.

4. Installation (Carburetor Rebuild)

This section outlines the general steps for rebuilding a Tillotson RK-23HS carburetor using the C·T·S repair kit. Specific carburetor designs may vary, so refer to your equipment's service manual for detailed disassembly and assembly procedures.

4.1 Disassembly

1. Remove Carburetor: Carefully remove the carburetor from the engine, noting the connections for fuel lines, throttle linkage, and choke.
2. Clean Exterior: Clean the exterior of the carburetor to prevent dirt from entering internal passages during disassembly.
3. Disassemble Covers: Remove the fuel pump cover and metering diaphragm cover.
4. Remove Diaphragms and Gaskets: Carefully remove the old fuel pump diaphragm, metering diaphragm, and all associated gaskets. Note their orientation.
5. Remove Metering Lever and Needle: Remove the pivot pin, metering lever, and metering needle.
6. Remove Inlet Screen: If present, carefully remove the inlet screen.
7. Inspect Components: Inspect all removed parts for wear or damage. Pay close attention to the condition of the carburetor body for cracks or corrosion.

4.2 Cleaning

1. Carburetor Cleaner: Use a specialized carburetor cleaner to thoroughly clean all internal passages and components. Ensure all orifices are clear.
2. Air Dry: Allow all parts to air dry completely or use compressed air to blow out passages. Do not use rags or paper towels that can leave fibers.

4.3 Reassembly

Replace old components with new ones from the C·T·S repair kit. Refer to the original carburetor's configuration or a service manual for correct order and orientation.

1. Install Inlet Screen: Install the new inlet screen, if applicable.
2. Install Metering Needle and Lever: Install the new metering needle, pivot arm, and pivot pin. Ensure the metering lever is flush with the carburetor body.
3. Install Metering Diaphragm: Place the new metering diaphragm and gasket in their correct positions, then secure the cover.
4. Install Fuel Pump Diaphragm: Place the new fuel pump diaphragm and gasket in their correct positions, then secure the cover.
5. Final Checks: Ensure all screws are tightened securely and all components move freely.
6. Reinstall Carburetor: Reinstall the rebuilt carburetor onto the engine, reconnecting all fuel lines, throttle linkage, and choke.

5. Operation (Post-Rebuild Adjustment)

After rebuilding and reinstalling the carburetor, it may require adjustment to ensure proper engine operation. Refer to your equipment's service manual for specific adjustment procedures for high-speed (H) and low-speed (L) mixture screws, and idle speed (T) screw.

5.1 Initial Settings (General Guidelines)

• High-Speed (H) Screw: Turn clockwise until lightly seated, then back out 1 to 1.5 turns.
• Low-Speed (L) Screw: Turn clockwise until lightly seated, then back out 1 to 1.5 turns.
• Idle Speed (T) Screw: Adjust as needed to prevent the engine from stalling at idle.

5.2 Fine-Tuning

Start the engine and allow it to warm up. Adjust the H and L screws incrementally (typically 1/8 turn at a time) to achieve smooth acceleration, stable idle, and maximum power without bogging or excessive smoke. Always prioritize engine health and follow manufacturer recommendations.

6. Maintenance

Regular maintenance helps prolong the life of your carburetor and ensures reliable engine performance.

• Fuel Quality: Always use fresh, clean fuel mixed to the correct ratio for 2-stroke engines. Stale or contaminated fuel is a primary cause of carburetor issues.
• Fuel Filter: Regularly inspect and replace the fuel filter to prevent debris from reaching the carburetor.
• Air Filter: Keep the air filter clean to ensure proper air-fuel mixture.
• Storage: For long-term storage, drain the fuel system or use a fuel stabilizer to prevent gum and varnish buildup in the carburetor.
• Inspection: Periodically inspect fuel lines and connections for leaks or cracks.

7. Troubleshooting

If your engine experiences issues after rebuilding the carburetor, consider the following common problems and solutions:

If problems persist, consult a qualified service technician or your equipment's service manual.

8. Specifications

• Model: Tillotson RK-23HS (Replacement Kit)
• Brand: C·T·S
• Manufacturer: C·T·S
• Item Weight: 0.352 ounces
• Package Dimensions: 5.87 x 5.12 x 0.35 inches
• UPC: 680044136967
• Date First Available: March 2, 2019

9. Warranty and Support

For questions regarding this product or for technical assistance, please contact the seller or refer to the C·T·S brand store on Amazon. Specific warranty details may be provided at the point of purchase or on the product packaging.

C·T·S Store: Visit the C·T·S Store on Amazon