PARTOL 22R Carburetor Instruction Manual

1. Introduction

This manual provides essential information for the installation, operation, and maintenance of your PARTOL 22R Carburetor. This carburetor is designed as a direct replacement for specific Toyota Pickup models, aiming to restore or improve engine performance.

1.1 Compatibility

This carburetor is compatible with the following Toyota Pickup models:

• Toyota Pickup 22R Engine, 2.4L (2366cc) from 1981-1987.
• Specifically replaces part numbers TOY-505, 35290, 2.4L 2366cc, and C4036.
• Features a 2-barrel design with a round plug connector.

Note: This unit does not fit 1987 Toyota models manufactured in the last six months of the year if they feature a 2-barrel 22R engine with a square end Super Jet carburetor.

Image 1.1: The PARTOL 22R Carburetor, designed for Toyota Pickup models.

Image 1.2: Detailed compatibility information for various Toyota Pickup 2.4L 2366cc L4 Manual models from 1983-1987.

2. Product Features

The PARTOL 22R Carburetor offers several features designed to enhance vehicle performance:

• Automatic Choke: Facilitates easier cold starts and consistent engine operation.
• Improved Throttle Response: Engineered to provide a more responsive acceleration.
• Enhanced Horsepower: May contribute to a 5-10% increase in horsepower.
• Fuel Efficiency: Designed to maintain fuel mileage close to original specifications.
• Durable Construction: Manufactured from heavy-duty zinc alloy for longevity.

Image 2.1: Key performance features of the carburetor.

Image 2.2: The carburetor's heavy-duty zinc alloy construction.

3. Components Included

The package typically includes the following items:

• 1 x Carburetor replacement unit.
• Necessary paper gaskets for installation.
• 1 x Screw (for specific assembly).

4. Setup and Installation

Installation of a carburetor requires mechanical knowledge and specialized tools. It is highly recommended that installation be performed by a qualified automotive technician.

4.1 Safety Precautions

• Always disconnect the vehicle's battery before beginning any work.
• Ensure the engine is cool to prevent burns.
• Work in a well-ventilated area.
• Wear appropriate personal protective equipment, including gloves and eye protection.
• Be aware of fuel lines and potential fuel spills; have a fire extinguisher nearby.

4.2 General Installation Steps (Consult a service manual for detailed vehicle-specific instructions)

1. Carefully remove the existing carburetor, noting the connections for fuel lines, vacuum hoses, and electrical wiring.
2. Clean the mounting surface on the intake manifold thoroughly.
3. Place the new gaskets onto the manifold.
4. Position the new PARTOL 22R Carburetor onto the manifold, ensuring proper alignment.
5. Secure the carburetor with the appropriate fasteners, tightening them evenly to prevent warping.
6. Reconnect all fuel lines, vacuum hoses, and electrical wiring to their correct positions. Pay close attention to the round green connector for the automatic choke.
7. Double-check all connections for security and proper routing.

Image 4.1: Detailed views of the carburetor's base, electrical connector, and choke assembly.

Image 4.2: Top view of the carburetor, illustrating the air horn and internal structure.

5. Operation

After successful installation, the carburetor is designed to operate with its automatic choke system. Initial engine startup may require minor adjustments to the idle speed screw to achieve the desired idle RPM.

• The automatic choke will engage during cold starts, providing a richer fuel mixture.
• As the engine warms up, the choke will gradually disengage.
• The carburetor is pre-tuned for optimal performance, but minor adjustments may be necessary based on specific vehicle conditions and environmental factors.

6. Maintenance

Regular maintenance helps ensure the longevity and optimal performance of your carburetor.

• Fuel Quality: Use clean, high-quality fuel. Consider using non-ethanol gasoline if available to prevent potential corrosion of carburetor components.
• Air Filter: Regularly inspect and replace the air filter to prevent debris from entering the carburetor.
• Linkages and Hoses: Periodically check all linkages, vacuum hoses, and fuel lines for wear, cracks, or loose connections.
• Cleaning: If performance issues arise, a professional carburetor cleaning may be necessary. Avoid disassembling the carburetor unless you have specific expertise.

7. Troubleshooting

If you encounter issues after installation, consider the following general troubleshooting steps. For complex problems, consult a certified mechanic.

• Rough Idle/Stalling: Check for vacuum leaks, ensure all hoses are securely connected. Adjust the idle speed screw if necessary.
• Poor Acceleration: Verify fuel delivery and ensure the throttle linkage operates smoothly.
• Hard Starting (Cold): Confirm the automatic choke is functioning correctly. Check electrical connections to the choke.
• Excessive Fuel Consumption/Rich Running: Inspect the float level (if adjustable) and ensure the choke is fully opening when the engine is warm.
• Wiring Issues: Some users have reported that the wire harness for the choke may be wired 180 degrees backward from the original. If experiencing choke issues, verify the pin orientation and re-route if necessary.

8. Specifications

Image 8.1: Key dimensions of the carburetor.

Image 8.2: Bottom view of the carburetor, highlighting the flange and throttle plates.

9. Warranty and Support

For information regarding warranty coverage, returns, or technical support, please refer to the product packaging or contact PARTOL customer service directly. Keep your purchase receipt as proof of purchase.