AUTOKAY PZ20 Carburetor Instruction Manual

Product Overview

The AUTOKAY PZ20 Carburetor is an aftermarket replacement part designed to optimize fuel-air mixture for various small engines. It is suitable for a wide range of 4-stroke ATVs, quads, and go-karts, ensuring reliable engine performance.

Figure 1: Main view of the AUTOKAY PZ20 Carburetor.

What's Included

The package typically includes the following components:

• 1 x PZ20 Carburetor
• 1 x Gasket
• 1 x O-ring
• 1 x Fuel Filter
• 1 x Air Filter

Figure 2: All components included in the package.

Compatibility

This PZ20 Carburetor is compatible with a range of vehicles and engine sizes. Please verify your vehicle's specifications before installation.

• Most Chinese brand 4-stroke ATVs, Go-karts, and UTVs (49cc, 50cc, 70cc, 90cc, 100cc, 110cc, 125cc, 135cc). This includes brands such as TaoTao, Buyang, Coolsport, Lifan, Kazuma, SUNL, Redcat, and Eagle.
• 49CC-125CC SSR SDG Lifan Pister Pro Dirt Bikes.
• Honda CRF50F models from 2004-2009 and 2011-2012.
• Honda CRF80F models from 2004-2009 and 2011-2013.

Setup and Installation

Proper installation is crucial for optimal performance and safety. If you are unsure about any steps, it is recommended to seek professional assistance.

1. Safety First: Ensure the engine is cool and the vehicle is stable. Disconnect the battery if necessary.
2. Remove Old Carburetor: Carefully disconnect the fuel line, throttle cable, and any vacuum lines from the old carburetor. Remove mounting bolts and detach the old unit.
3. Install New Gaskets: Clean the mounting surfaces. Place the new gaskets and O-ring (if applicable) between the engine intake manifold and the new carburetor to ensure a proper seal.
4. Mount New Carburetor: Position the new PZ20 carburetor and secure it with the mounting bolts. Do not overtighten.
5. Connect Lines: Reattach the fuel line, throttle cable, and any vacuum lines to their respective ports on the new carburetor. Ensure all connections are secure and free of leaks.
6. Install Air Filter: Attach the new air filter to the carburetor intake. Use the provided clamp to secure it tightly.
7. Install Fuel Filter: If replacing, install the new fuel filter in the fuel line between the fuel tank and the carburetor, ensuring correct flow direction.
8. Initial Checks: Before starting, check all connections, ensure no tools are left in the engine bay, and verify fuel flow.

Figure 3: Carburetor showing intake measurement for fitment verification.

Operating Instructions

After installation, follow these general steps for operating your vehicle with the new carburetor:

1. Fuel Supply: Ensure there is sufficient fuel in the tank and the fuel petcock (if present) is in the 'ON' position.
2. Choke Operation: For cold starts, engage the choke lever (typically by pulling it out or moving it to the 'ON' position).
3. Starting the Engine: Start the engine using the electric starter or kick-start.
4. Warm-up: Allow the engine to warm up for a few minutes. Gradually disengage the choke as the engine warms and idles smoothly.
5. Throttle Control: Test throttle response gently. The engine should rev smoothly without hesitation or bogging.
6. Idle Adjustment: If the idle is too high or too low, adjust the idle screw on the carburetor until a stable idle speed is achieved.

Figure 4: Side view of the carburetor showing the choke lever.

Maintenance

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

• Air Filter: Regularly inspect and clean or replace the air filter. A dirty air filter can restrict airflow and affect engine performance.
• Fuel Filter: Check the fuel filter periodically for debris. Replace it if it appears clogged or dirty to prevent contaminants from reaching the carburetor.
• Fuel Quality: Use clean, fresh fuel. Stale or contaminated fuel can cause carburetor issues.
• Carburetor Cleaning: If performance issues arise, the carburetor may need cleaning. This typically involves disassembling the carburetor, cleaning jets and passages with carburetor cleaner, and reassembling with new gaskets if necessary.
• Idle and Mixture Adjustment: Periodically check and adjust the idle speed and air-fuel mixture screw as needed to maintain optimal engine operation.

Troubleshooting

Here are some common issues and potential solutions:

If these steps do not resolve the issue, it is recommended to consult a qualified mechanic.

Specifications

Product Media

Warranty and Support

For warranty information, technical support, or any product-related inquiries, please contact AUTOKAY customer service directly. Refer to your purchase documentation for specific warranty terms and contact details.