Pro Chaser 697978 Carburetor Instruction Manual

1. Introduction

This manual provides essential information for the installation, operation, and maintenance of your Pro Chaser 697978 Carburetor. This carburetor is designed as a replacement part for various Briggs & Stratton and compatible engines. Please read these instructions thoroughly before proceeding with installation or use to ensure proper function and safety.

Important Note: Carburetor designs can vary slightly. Always compare the provided images and specifications with your existing carburetor to confirm compatibility before installation. If you are uncertain, consult a qualified technician or contact Pro Chaser support with clear images of your current carburetor.

Image 1.1: The Pro Chaser 697978 Carburetor, main product view.

2. Package Contents

Verify that all components listed below are present in your package:

• 1 x Carburetor
• 2 x Gaskets
• 1 x Fuel Filter
• 1 x Spark Plug
• 1 x Fuel Hose
• 2 x Clamps
• 1 x Insulator
• 1 x Safety Switch (Low Oil Alert)
• 1 x Shut Off Valve
• 1 x Air Filter
• 1 x Accessory Kit (as pictured)

Image 2.1: The Pro Chaser 697978 Carburetor and its accompanying accessory kit.

3. Compatibility

This Pro Chaser carburetor is compatible with the following engine models and equipment:

• Briggs & Stratton Nikki Carburetors: 695115, 697978, 697798, 695114, 694615
• Briggs & Stratton 5500 Storm Responder
• Generac Power Boss Wheelhouse 5500
• Generac Power Boss Wheelhouse 5600 Storm Plus
• Engines with 10hp 305cc specifications

4. Installation and Setup

Safety First: Before beginning any installation, ensure the engine is turned off, cooled, and the spark plug wire is disconnected to prevent accidental starting. Wear appropriate safety gear, including gloves and eye protection.

1. Preparation: Gather necessary tools (wrenches, screwdrivers, pliers). Ensure you have a clean workspace.
2. Fuel System Drainage: Drain the fuel tank and carburetor bowl to prevent spills.
3. Disconnect Components: Carefully disconnect the fuel line, throttle linkage, choke linkage, and any electrical connections from the old carburetor.
4. Remove Old Carburetor: Unbolt and remove the old carburetor, taking note of the orientation and any spacers or gaskets.
5. Install New Gaskets and Insulator: Place the new gaskets and insulator in their correct positions between the engine and the new carburetor. Ensure they are properly seated to prevent air leaks.
6. Mount New Carburetor: Position the new Pro Chaser carburetor and secure it with the bolts. Do not overtighten.
7. Reconnect Components: Reattach the fuel line, throttle linkage, choke linkage, and electrical connections. Ensure all connections are secure and move freely.
8. Install Fuel Filter and Hose: If replacing, install the new fuel filter in the fuel line and secure the new fuel hose with clamps.
9. Install Spark Plug and Air Filter: Replace the old spark plug with the new one provided. Install the new air filter.
10. Refill Fuel: Refill the fuel tank with fresh, appropriate fuel.
11. Initial Start-up: Reconnect the spark plug wire. Follow your engine manufacturer's instructions for initial start-up after carburetor replacement. Be prepared to make minor adjustments to the idle speed if necessary.

Image 4.1: Side view of the carburetor, showing key dimensions for reference during installation.

Image 4.2: Front view of the carburetor, illustrating the air intake and mounting points.

5. Operation

Once installed, the carburetor regulates the air-fuel mixture for your engine. Proper operation relies on correct installation and regular maintenance.

• Choke Operation: Use the choke for cold starts as per your engine's specific instructions.
• Throttle Control: The throttle lever controls engine speed by adjusting the carburetor's butterfly valve.
• Fuel Quality: Always use fresh, clean fuel of the recommended octane for your engine. Stale or contaminated fuel can cause carburetor issues.

6. Maintenance

Regular maintenance extends the life of your carburetor and ensures optimal engine performance.

• Fuel Filter Replacement: Replace the fuel filter annually or more frequently if operating in dusty conditions or with questionable fuel quality.
• Air Filter Cleaning/Replacement: Regularly inspect and clean or replace the air filter to ensure proper airflow to the carburetor. A clogged air filter can lead to a rich fuel mixture and poor performance.
• Fuel System Stabilizer: Use a fuel stabilizer if the engine will be stored for an extended period (e.g., over winter) to prevent fuel degradation and carburetor clogging.
• Carburetor Cleaning: If performance issues arise, the carburetor may require cleaning. This typically involves disassembling the carburetor, cleaning jets and passages with carburetor cleaner, and replacing gaskets. This procedure should be performed by individuals with mechanical experience.

Image 6.1: Top view of the carburetor, showing the choke mechanism and linkages.

7. Troubleshooting

If you encounter issues after installing the carburetor, consider the following common problems and solutions:

• Engine Not Starting:
  • Check fuel level and ensure the fuel shut-off valve is open.
  • Verify spark plug is clean and gapped correctly.
  • Ensure choke is set correctly for starting.
  • Check for proper fuel flow to the carburetor.
• Rough Idling or Stalling:
  • Inspect for air leaks around carburetor gaskets.
  • Check idle speed adjustment.
  • Ensure fuel is fresh and not contaminated.
• Loss of Power or Poor Performance:
  • Check air filter for clogs.
  • Inspect fuel filter for blockages.
  • Ensure throttle linkage operates smoothly and fully.

For persistent issues, it is recommended to consult a qualified small engine mechanic.

Image 7.1: Angled view of the carburetor, showing various ports and connections.

8. Specifications

Image 8.1: Additional angled view of the carburetor, highlighting its construction.

9. Warranty Information

The Pro Chaser 697978 Carburetor comes with a 90-day manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, misuse, neglect, accident, or unauthorized modifications. Please retain your proof of purchase for warranty claims.

10. Support and Contact

If you have any questions regarding the installation, operation, or maintenance of your Pro Chaser carburetor, or if you require technical assistance, please contact Pro Chaser customer support. Refer to your purchase documentation for specific contact details or visit the official Pro Chaser website.